EN： Indirect questions (embedded questions) are used when a question is placed inside another statement or question. Unlike direct questions, indirect questions follow statement word order (subject + verb) instead of question word order (verb + subject). Here, 'where the science lab is' is the noun clause acting as the object of 'know'.
中文： 间接问句（嵌入式问句）用于将一个疑问句放入另一个陈述句或问句中。与直接问句不同，间接问句必须使用陈述句语序（主语 + 动词），而非疑问句语序（动词 + 主语）。在此处，「where the science lab is」是一个名词从句，作为主要动词「know」的宾语。
Do you know what time the library closes?
你知道图书馆几点关门吗？
EN： In English-speaking schools, asking for directions with 'Do you know where... is?' or 'Could you tell me where... is?' is considered polite and natural when approaching peers or staff. Directly asking 'Where is the science lab?' can sometimes sound a bit too abrupt.
中文： 在英語系國家的學校中，使用「Do you know where... is?」或「Could you tell me where... is?」來問路，對同儕或教職員來說是非常禮貌且自然的表達方式。直接問「Where is the science lab?」有時會顯得有些過於唐突。
EN： This sentence uses an indirect question (noun clause) 'which grade you are in' as the direct object of the verb 'tell'. In indirect questions, the word order is subject + verb ('you are'), not the auxiliary/verb + subject order used in direct questions ('are you').
中文： 本句使用了间接问句（名词从句）「which grade you are in」作为动词「tell」的直接宾语。在间接问句中，语序必须是「主语 + 动词」（you are），而非直接问句中的「助动词/动词 + 主语」（are you）。
Can you tell me where the library is?
你能告诉我图书馆在哪里吗？
EN： The phrase 'which grade' acts as a determinative phrase introducing the noun clause. 'Which' is an interrogative determiner modifying the noun 'grade', asking for specific information from a limited set of options.
中文： 短语「which grade」作为引导名词从句的疑问限定词短语。「which」是疑问限定词，用来修饰名词「grade」，用于在有限的选项中询问特定的信息。
I don't know which color you prefer.
我不知道你比较喜欢哪一个颜色。
EN： In US and many international school systems, students are grouped by 'grades' (e.g., 9th grade, 10th grade) rather than 'years' (which is more common in the UK, e.g., Year 10). Asking 'which grade you are in' is a very common icebreaker for students meeting each other for the first time.
中文： 在美國及許多國際學校學制中，學生是以「grades」（年級，如 9th grade）來區分，而非英國常用的「years」（如 Year 10）。對於初次見面的學生來說，詢問「which grade you are in」是一個非常常見且自然的破冰話題。
EN： The verb 'wonder' is often followed by an indirect question starting with 'if' or 'whether' to express curiosity or polite inquiry about a factual situation. This structure functions as the noun clause (object) of the sentence.
中文： 动词「wonder」（想知道）后面经常接由「if」或「whether」（是否）引导的间接问句，用来表达好奇或礼貌地询问某个事实状况。此结构在句子中作为名词从句（宾语）。
I wonder if the museum is free on Mondays.
我想知道这家博物馆周一是否免费。
EN： The prepositional phrase 'at lunch' is used to describe the time period during the lunch break. Unlike 'for lunch' (which refers to the meal itself), 'at lunch' refers to the time of day when people typically eat lunch.
中文： 介词短语「at lunch」用来描述午休这段时间。与「for lunch」（指午餐这顿饭本身）不同，「at lunch」指的是人们通常吃午餐的一天中的那个时间段。
She usually reads a book at lunch.
她通常在午休时间读书。
EN： In many English-speaking schools, the library is a popular place for students to study, read, or use computers during their lunch break. Asking if the library is open 'at lunch' is a common inquiry, as library hours may vary during non-class times.
中文： 在許多英語國家的學校中，圖書館是學生在午休時間讀書、閱讀或使用電腦的熱門去處。詢問圖書館在「中午（午休時間）」是否開放是非常常見的，因為非上課時間的圖書館開放時間可能會有所變動。
EN： Indirect questions (noun clauses) are used within another question or statement. Unlike direct questions, they follow statement word order (subject + verb) instead of question word order (verb + subject). In 'do you know what time it closes?', 'what time it closes' is the noun clause acting as the object of 'know'.
中文： 间接问句（名词从句）用于另一个问句或陈述句之中。与直接问句不同，间接问句必须使用陈述句语序（主语 + 动词），而非疑问句语序（动词 + 主语）。在 'do you know what time it closes?' 中，'what time it closes' 是名词从句，作为 'know' 的宾语。
Do you know where she lives?
你知道她住在哪里吗？
EN： The simple present tense is used here to ask about a regular schedule or timetable (the closing time of a place). For third-person singular subjects (it), the verb 'close' takes the ending '-es' to become 'closes'.
中文： 此处使用一般现在时来询问规律的日程或时间表（某个场所的关门时间）。当主语为第三人称单数（it）时，动词 'close' 须加上词尾 '-es' 成为 'closes'。
The train leaves at nine o'clock.
火车在九点钟出发。
EN： An indirect question is a question embedded inside another statement or question. Unlike direct questions, indirect questions use statement word order (subject + verb) instead of question word order (verb + subject). In this sentence, 'how I can join a club' is an indirect question acting as the direct object of the verb 'tell'.
中文： 间接问句（Indirect Question）是嵌入在另一个陈述句或问句中的问句。与直接问句不同，间接问句必须使用陈述句语序（主语 + 动词），而非疑问句语序（助动词/动词 + 主语）。在本句中，「how I can join a club」是一个间接问句，作为动词「tell」的直接宾语。
Could you tell me where the library is?
你能告诉我图书馆在哪里吗？
EN： The modal verb 'could' is used at the beginning of a question to make a polite request. It is more formal and polite than 'can'.
中文： 情态助动词「could」用于问句开头，表示礼貌的请求。这比使用「can」更为正式且客气。
Could you help me with my homework?
可以请你帮我做功课吗？
EN： In English-speaking schools and universities, joining clubs (extracurricular activities) is highly encouraged and is a major part of student life. Asking 'Could you tell me...' is a very common and polite way to ask for information from staff or fellow students.
中文： 在英語系國家的學校中，加入社團（課外活動）是非常受到鼓勵的，也是學生生活的重要組成部分。使用「Could you tell me...」是一種向教職員或同學詢問資訊時，非常常見且禮貌的表達方式。
EN： The phrase 'how many + plural noun' is used to ask about quantity. In this sentence, it functions as an indirect question (noun clause) acting as the complement of the adjective 'sure'. Unlike direct questions, indirect questions follow statement word order (subject + verb: 'we have').
中文： 「how many + 复数名词」用于询问数量。在本句中，它引导一个间接问句（名词从句），作为形容词「sure」的补语。与直接问句不同，间接问句必须使用陈述句语序（主语 + 动词：「we have」）。
I don't know how many books he bought.
我不知道他买了多少本书。
EN： The structure 'subject + be verb + not sure + noun clause' is a common pattern used to express uncertainty or a lack of knowledge about a specific fact in a polite and indirect manner.
中文： 「主语 + be动词 + not sure + 名词从句」是一个常用句型，用于以礼貌且委婉的方式表达对某个特定事实的不确定或不了解。
She is not sure when the meeting starts.
她不确定会议什么时候开始。
EN： In US high schools, 'clubs' (extracurricular activities) are a major part of student life. Students often ask about the number and variety of clubs at the beginning of the school year to find social groups and build their college applications.
中文： 在美國高中，「社團」（課外活動）是學生生活的重要組成部分。學生通常會在學年初詢問社團的數量和種類，以便融入社交圈並為大學申請累積經歷。
EN： This sentence uses an indirect question (noun clause) 'when the school bus leaves' as the direct object of the verb 'know'. In indirect questions, the word order must be statement word order (subject + verb) rather than question word order (e.g., 'when does the school bus leave').
中文： 本句使用间接问句（名词性从句）「when the school bus leaves」作为动词「know」的直接宾语。在间接问句中，语序必须使用陈述句语序（主语 + 动词），而非疑问句语序（例如：when does the school bus leave）。
Do you know where the library is?
你知道图书馆在哪里吗？
EN： The simple present tense 'leaves' is used here to describe a scheduled future event (the school bus timetable).
中文： 此处使用一般现在时「leaves」来描述已排定的未来事件（校车时刻表）。
The train departs at 9:00 AM tomorrow.
火车明天上午九点出发。
EN： In many English-speaking countries, school buses run on very strict schedules. Asking about the bus schedule is a very common daily interaction among students.
中文： 在許多英語系國家，校車（黃色巴士）的行駛時間非常準時且固定。詢問校車時間是學生之間非常常見的日常互動。
EN： The sentence uses a noun clause (or indirect question) 'what time it comes' as the object of the verb 'check'. In indirect questions, the word order must be statement order (subject + verb) rather than question order (e.g., 'what time does it come').
中文： 本句使用名词从句（或称间接问句）「what time it comes」作为动词「check」的宾语。在间接问句中，语序必须使用陈述句语序（主语 + 动词），而非疑问句语序（例如「what time does it come」）。
Do you know what time the library opens?
你知道图书馆几点开门吗？
EN： The main clause 'I think' is followed by an object clause '(that) you can check...'. The subordinating conjunction 'that' is commonly omitted in informal spoken English.
中文： 主句「I think」后面接了一个宾语从句「(that) you can check...」。在日常口语中，引导宾语从句的连接词「that」通常会被省略。
I think we should leave now.
我想我们现在该走了。
EN： This sentence uses an indirect question (or embedded question) 'where the office is' inside a polite request. In English, when a question is embedded within another sentence, it follows statement word order (subject + verb) rather than question word order (verb + subject). Therefore, we say 'where the office is' instead of 'where is the office'.
中文： 本句在礼貌的请求中使用了「间接问句」（或称嵌入式问句）「where the office is」。在英语中，当一个问句嵌入到另一个句子中时，它必须使用陈述句的语序（主语 + 动词），而非疑问句的语序（动词 + 主语）。因此，我们要说「where the office is」，而不是「where is the office」。
Do you know what time the library closes?
你知道图书馆几点关门吗？
EN： The phrase 'Can you tell me...' is a common polite formula used to ask for information. It is softer and more polite than asking a direct question like 'Where is the office?'.
中文： 句型「Can you tell me...」（你能告诉我……吗？）是用于询问信息的常用礼貌表达方式。这比直接问「Where is the office?」听起来更加委婉和有礼貌。
Can you tell me how to get to the station?
你能告诉我怎么去车站吗？
EN： In English-speaking academic or professional environments, asking 'Can you tell me...' or 'Could you tell me...' is considered much more polite and appropriate when approaching a stranger or staff member, compared to a direct question like 'Where is the office?'.
中文： 在英語系國家的學校或工作環境中，當向陌生人或教職員問路時，使用「Can you tell me...」或「Could you tell me...」會比直接問「Where is the office?」顯得更加有禮貌且得體。
EN： The sentence uses a double object construction (ditransitive verb) with 'show'. The verb 'show' takes an indirect object ('you', the recipient) and a direct object ('where it is', the thing being shown).
中文： 本句使用了双宾语结构（双宾动词）。动词「show」（展示/带领）后面接了两个宾语：间接宾语「you」（接受者）与直接宾语「where it is」（被展示的事物）。
He showed me his new car.
他向我展示了他的新车。
EN： The clause 'where it is' is a noun clause functioning as the direct object. It uses embedded question word order (subject + verb: 'it is') rather than question word order ('where is it').
中文： 「where it is」是一个名词从句，在此作为直接宾语。它必须使用间接问句的语序，即「主语 + 动词」（it is），而非疑问句语序（where is it）。
Do you know where the library is?
你知道图书馆在哪里吗？
EN： In English-speaking school environments, offering to physically show someone where a place is (rather than just giving directions) is considered highly polite and welcoming, especially to new students or visitors.
中文： 在英語系國家的校園文化中，主動帶路（而不僅僅是口頭指引方向）被視為非常禮貌且友善的表現，特別是對於新生或訪客，這能快速建立起溫馨的互助氛圍。
EN： The verb 'wonder' is followed by an indirect question (noun clause) introduced by the question word 'why'. In indirect questions, the word order is subject + verb ('the hallway is'), not verb + subject ('is the hallway') as in direct questions.
中文： 动词「wonder」（想知道）后面接由疑问词「why」引导的间接问句（名词从句）。在间接问句中，语序应为「主语 + 动词」（the hallway is），而非直接问句中的「动词 + 主语」（is the hallway）。
I wonder why she left the meeting early.
我想知道她为什么提前离开会议。
EN： The adverb 'so' is used before adjectives (like 'quiet') to add emphasis, meaning 'to such a great extent' or 'very'.
中文： 副词「so」用于形容词（如「quiet」）之前以示强调，表示「如此地」或「非常」。
The classroom was so warm that I fell asleep.
教室里太暖和了，以至于我睡着了。
EN： The phrase 'I don't know why' is an ellipsis of an indirect question (noun clause), where the rest of the clause 'exams are near' is omitted because it is understood from the context.
中文： 「I don't know why」是一个省略了间接问句（名词从句）的表达方式。在日常对话中，为了避免重复，通常会省略疑问词（why）后面的主语与动词，因为其内容在语境中已经很明确。
She looks upset, but I don't know why.
她看起来很不高兴，但我不知道为什么。
EN： The adjective 'near' is used as a predicative adjective meaning 'close in time' or 'approaching soon'.
中文： 形容词「near」在此处用作表语形容词，意思是时间上的「临近」或「即将到来」。
Winter is near, and the days are getting shorter.
冬天快到了，白天正变得越来越短。
EN： The verb 'ask' can be used as a ditransitive verb, which takes two objects: an indirect object (usually a person, 'me') and a direct object (usually a thing, 'many questions'). The pattern is 'ask + someone + something'.
中文： 动词「ask」（问）可作为双宾语动词（ditransitive verb），后面接两个宾语：间接宾语（通常是人，如 'me'）与直接宾语（通常是事物，如 'many questions'）。常用句型为「ask + 某人 + 某事」。
The teacher asked us several difficult questions.
老师问了我们几个困难的问题。
EN： The phrase 'On my first day' acts as an adverbial of time. When placed at the beginning of a sentence for emphasis, it is typically followed by a comma.
中文： 介词短语「On my first day」（在我第一天时）在此作为时间状语。当放在句首以示强调时，通常后面会加上逗号与主句隔开。
On her first day, she met the department manager.
在她上班的第一天，她见到了部门经理。
EN： Indirect questions (noun clauses) are used when a question is embedded within another sentence. Unlike direct questions ('Where is the cafeteria?'), indirect questions use statement word order (subject + verb): 'where the cafeteria was'.
中文： 间接问句（名词性从句）用于将一个疑问句嵌入另一个句子中。与直接问句（Where is the cafeteria?）不同，间接问句必须使用陈述句语序（主语 + 动词），即「where the cafeteria was」。
He asked me where the library was.
他问我图书馆在哪里。
EN： Tense agreement (backshift) in reported speech. Since the main verb 'wanted' is in the past tense, the verb in the noun clause also shifts to the past tense ('was' instead of 'is').
中文： 转述语气中的时态一致（时态后移）。因为主句动词「wanted」是过去式，所以名词性从句中的动词也必须同步转为过去式（使用「was」而非「is」）。
She wanted to know what time the store closed.
她想知道那家店几点打烊。
EN： In US schools, the 'cafeteria' is a central social hub where students eat lunch. Asking where the cafeteria is is a very common question for new students on their first day, as school layouts can be large and confusing.
中文： 在美國學校中，「cafeteria」（自助餐廳/食堂）是學生吃午餐和社交的核心場所。對於第一天入學的新生來說，詢問餐廳在哪裡是非常常見的問題，因為校園規劃通常較大且複雜。
EN： Indirect questions with 'how' can be used as noun clauses serving as the direct object of a verb. In this sentence, 'how she could find the science lab' is a noun clause acting as the direct object of 'told'. Note that the word order in noun clauses is subject + verb (she could find), not verb + subject (could she find).
中文： 以 'how' 引导的间接问句可以作为名词从句，在句中担任动词的直接宾语。在本句中，「how she could find the science lab」是一个名词从句，作为动词「told」的直接宾语。请注意，名词从句的语序应为「主语 + 动词」（she could find），而非疑问句的「动词 + 主语」（could she find）。
He explained how we could solve the problem.
他解释了我们应该如何解决这个问题。
EN： The verb 'tell' is a ditransitive verb, which means it takes two objects: an indirect object (usually a person, 'her') and a direct object (the information being shared, 'how she could find...').
中文： 动词「tell」是一个双宾动词（授予动词），这意味着它需要两个宾语：间接宾语（通常是人，如「her」）和直接宾语（所分享的信息，如「how she could find...」）。
She told me where the meeting was.
她告诉我会议在哪里举行。
EN： The use of 'if' as a conjunction introducing a noun clause (indirect question) meaning 'whether'. It is commonly used after verbs of inquiry like 'wonder' or 'ask'. Note that the word order in the noun clause is subject + verb (the library was open), not verb + subject.
中文： 使用「if」作为引导名词从句（间接问句）的连接词，表示「是否」。这通常用于表示询问的动词（如 wonder 或 ask）之后。请注意，名词从句中的语序是「主语 + 动词」（the library was open），而非倒装语序。
He asked if the meeting was canceled.
他询问会议是否取消了。
EN： Backshift of tenses in reported speech or past-tense narratives. Since the main verb 'wondered' is in the past tense, the verb in the noun clause 'is' shifts to the past tense 'was' to maintain tense agreement.
中文： 间接引语或过去时态叙述中的「时态后移」。由于主句动词「wondered」是过去式，因此名词从句中的动词「is」需转化为过去式「was」，以保持时态一致。
She wanted to know if you were coming to the party.
她想知道你是否会来参加派对。
EN： Indirect Questions (Noun Clauses): An indirect question is used inside another sentence and follows statement word order (subject + verb) rather than question word order. Here, 'what time the clubs usually met' acts as the direct object of the verb 'explained'.
中文： 间接问句（名词性从句）：间接问句嵌入在另一个句子中，须使用陈述句语序（主语 + 动词），而非疑问句语序。在此处，「what time the clubs usually met」作为动词「explained」的直接宾语。
She told me what time the train usually arrives.
她告诉我火车通常几点到达。
EN： Sequence of Tenses: When the main verb of a sentence is in the past tense ('explained'), the verbs in the subordinate noun clause are also typically backshifted to a past tense ('met') to maintain tense consistency.
中文： 时态一致：当主句的动词为过去式（explained）时，从句中的名词性从句中的动词通常也需要转为过去式（met），以保持时态的一致性。
He asked what time the library closed.
他问了图书馆几点闭馆。
EN： In many English-speaking high schools, extracurricular clubs are a major part of student life. They usually meet right after school or during designated activity periods, and knowing their schedules is essential for social integration.
中文： 在許多英語國家的中學裡，課外社團是學校生活非常重要的一部分。社團通常在放學後或指定的活動時間聚會，了解社團的時間表對於融入校園社交生活至關重要。
EN： This sentence uses an indirect question ('where she could buy lunch') embedded within a main clause. In indirect questions, the word order is statement order (subject + verb) rather than question order (verb + subject), and the tense shifts backward (backshift) to match the past tense of the reporting verb 'asked'.
中文： 本句使用了间接问句（'where she could buy lunch'）嵌入在主句中。在间接问句中，语序须使用陈述句语序（主语 + 动词），而非疑问句语序（动词 + 主语），且时态需配合主要动词 'asked' 进行「时态后退」（将 can 改为 could）。
He asked me what time the train left.
他问我火车什么时候出发。
EN： The verb 'ask' can take a double object (ditransitive structure): 'ask + indirect object (person) + direct object (the question/clause)'. Here, 'me' is the indirect object, and the noun clause 'where she could buy lunch' is the direct object.
中文： 动词 'ask' 可以接双宾语（双宾动词结构）：「ask + 间接宾语（人）+ 直接宾语（问题/从句）」。在此处，'me' 是间接宾语，而名词从句 'where she could buy lunch' 则是直接宾语。
She asked him if he was hungry.
她问他是否饿了。
EN： The verb 'show' can take two objects (ditransitive verb): an indirect object (her) and a direct object (where the student office was). This pattern is used to indicate the recipient and the information or thing being shown.
中文： 动词「show」（展示/指引）可以接双宾语（双宾动词）：间接宾语（her，她）与直接宾语（where the student office was，学生办公室在哪里）。此句型用于表示接收者以及被展示的信息或事物。
He showed me how to solve the problem.
他向我示范了如何解决这个问题。
EN： An indirect question (noun clause) introduced by 'where' is used as the direct object. In indirect questions, the word order must be statement order (subject + verb: 'the student office was') rather than question order ('was the student office'). Also, the past tense 'was' is used to match the main verb 'showed' (backshift/tense agreement).
中文： 由「where」引导的间接问句（名词从句）在此作直接宾语。在间接问句中，语序必须是陈述句语序（主语 + 动词：「the student office was」），而非疑问句语序（「was the student office」）。此外，动词使用过去式「was」以配合主要动词「showed」的时态（时态一致）。
She asked me where the library was.
她问我图书馆在哪里。
EN： In English-speaking schools, the 'student office' or 'main office' is a central hub where students go for administrative help, attendance issues, or general inquiries. Helping newcomers find their way around campus is a common and highly appreciated gesture of friendliness.
中文： 在英語系國家的學校中，「student office」（學生辦公室）或「main office」（總務/行政辦公室）是學生尋求行政協助、處理出缺勤或進行一般諮詢的中心樞紐。幫助新生熟悉校園環境是展現友善與熱心助人的常見舉動。
EN： Indirect Questions (Noun Clauses): An indirect question is used to ask for information politely or report a question. It is introduced by a question word (how, what, where, etc.) followed by statement word order (subject + verb), not question word order (verb + subject). In this sentence, 'how the bus schedule worked' acts as the noun clause serving as the direct object of 'to know'.
中文： 间接问句（名词从句）：间接问句用于客气地询问信息或转述问题。它由疑问词（如 how, what, where 等）引导，后面接陈述句语序（主语 + 动词），而非疑问句语序（动词 + 主语）。在本句中，「how the bus schedule worked」作为名词从句，担任「to know」的直接宾语。
I want to know where the library is.
我想知道图书馆在哪里。
EN： Sequence of Tenses (Backshifting): When the main reporting verb is in the past tense ('wanted'), the verb in the subordinate noun clause is also backshifted to a past tense ('worked') to maintain tense agreement, even if the schedule still works that way now.
中文： 时态一致（时态后退）：当主要从句的动词为过去式（wanted）时，从属名词从句中的动词通常也需要转为过去式（worked）以保持时态一致，即使该时刻表现在依然是这样运作的。
He asked me what time the train left.
他问我火车是几点出发的。
EN： Gerund as Subject: A gerund (verb + -ing) can function as a noun and serve as the subject of a sentence. It is treated as a singular noun, so it takes a singular verb (e.g., 'reminded' in the past tense, or 'reminds' in the present tense).
中文： 动名词当主语：动名词（动词 + -ing）可以像名词一样在句子中担任主语。动名词主语视为单数，因此搭配单数动词（例如过去式的 'reminded' 或现在式的 'reminds'）。
Learning a new language opens up many opportunities.
学习一门新语言会开启许多机会。
EN： Indirect Questions as Noun Clauses: The phrase 'how kind a small act can be' is an indirect question functioning as a noun clause (the direct object of 'reminded me'). It follows the declarative word order (subject + verb) rather than the interrogative word order.
中文： 间接问句作为名词从句：'how kind a small act can be' 是一个间接问句，在此句中作为名词从句（担任 'reminded me' 的直接宾语）。其语序应使用陈述句语序（主语 + 动词），而非疑问句语序。
She explained how difficult the exam was.
她解释了那场考试有多么困难。
EN： In English-speaking cultures, there is a strong emphasis on 'random acts of kindness'—small, unexpected good deeds done for others. This sentence reflects the cultural value placed on everyday helpfulness and its emotional impact on both the giver and the receiver.
中文： 在英語系國家中，非常強調「隨機的善舉」（random acts of kindness），即對他人做出微小且出乎意料的好事。這句話反映了人們對日常互助的重視，以及這種行為對施予者和接受者雙方所帶來的心理溫暖。
EN： An indirect question (or embedded question) is a question that is placed inside another sentence or question. When we embed a question like 'Where is the gym?' inside a polite opening like 'Could you tell me...?', the word order changes from verb-subject ('is the gym') to subject-verb ('the gym is').
中文： 间接问句（或嵌入式问句）是指将一个问句放入另一个句子或问句中。当我们把像 'Where is the gym?'（体育馆在哪里？）这样的直接问句，放入像 'Could you tell me...?'（你能告诉我...吗？）这样有礼貌的开头时，语序会从「动词 + 主语」（is the gym）改为「主语 + 动词」（the gym is）。
Do you know what time the library closes?
你知道图书馆几点关门吗？
EN： The modal verb 'could' is used here to make a polite request. It is softer and more polite than 'can' when asking for information or help from strangers or in formal situations.
中文： 助动词 'could' 在此处用于表示有礼貌的请求。在向陌生人询问信息或在正式场合寻求帮助时，它比 'can' 更委婉、更有礼貌。
Could you help me find my classroom?
可以请你帮我找我的教室吗？
EN： In English-speaking schools and universities, asking for directions politely using 'Could you tell me...' is a standard way to approach classmates or staff. It shows respect and is highly encouraged in social interactions.
中文： 在英語系國家的學校和大學中，使用 'Could you tell me...' 禮貌地問路是向同學或教職員搭話的標準方式。這展現了對他人的尊重，在社交互動中非常受到鼓勵。
EN： An indirect question (noun clause) is used inside another clause. Unlike direct questions, it uses statement word order (subject + verb) instead of question word order. Here, 'where it is' acts as the object of the verb 'know'.
中文： 间接问句（名词性从句）用于另一个从句中。与直接问句不同，它使用陈述句语序（主语 + 动词），而非疑问句语序。在此处，「where it is」作为动词「know」的宾语。
Do you know when the train arrives?
你知道火车什么时候到吗？
EN： In informal spoken English, 'than me' (using the object pronoun) is commonly used for comparison instead of the grammatically formal 'than I (do)'.
中文： 在非正式的口语英语中，比较级后面常用「than me」（使用宾格代词），而非语法上更正式的「than I (do)」。
She is much taller than me.
她比我高得多。
EN： Using 'I think' at the beginning of a sentence is a common way to soften a statement, making it sound polite and less direct or demanding, which is highly valued in English-speaking social interactions.
中文： 在句首使用「I think」（我想/我覺得）是英文中常見的委婉語氣表達方式，能讓話語聽起來更有禮貌、不那麼直接或強硬，這在英語系國家的社交互動中非常重要。
EN： This sentence uses an indirect question (noun clause) introduced by 'if' (meaning 'whether'). In English, when a yes/no question is embedded within another question or statement, we use 'if' or 'whether' followed by statement word order (subject + verb), not question word order.
中文： 本句使用了由 'if'（意为「是否」）引导的间接问句（名词从句）。在英文中，当一个「是否」的疑问句被嵌入另一个问句或陈述句时，我们会使用 'if' 或 'whether'，后接陈述句语序（主语 + 动词），而非疑问句语序。
Do you know if the library is open on Sundays?
你知道图书馆星期天是否开放吗？
EN： The main clause 'Do you know...?' is a direct question, so the entire sentence ends with a question mark. However, the embedded clause 'if the pool is open today' maintains a declarative structure (subject 'the pool' + verb 'is').
中文： 主句 'Do you know...?' 是一个直接问句，因此整个句子以问号结尾。然而，嵌入的从句 'if the pool is open today' 仍保持陈述句结构（主语 'the pool' + 动词 'is'）。
Can you tell me if the bus has left?
你能告诉我公交车是否已经开走了吗？
EN： Indirect questions with 'I wonder': When we want to ask a question politely or express curiosity, we can use 'I wonder' followed by a question word (who, what, when, where, why, how). Unlike direct questions, indirect questions follow statement word order (subject + verb) instead of question word order (verb + subject).
中文： 使用「I wonder」的间接问句：当我们想礼貌地提问或表达好奇时，可以使用「I wonder」后接疑问词（who, what, when, where, why, how）。与直接问句不同，间接问句要使用陈述句语序（主语 + 动词），而非疑问句语序（动词 + 主语）。
I wonder where she lives.
我想知道她住在哪里。
EN： Noun clause as object: The phrase 'what time it closes' acts as a noun clause serving as the direct object of the verb 'wonder'. The subject of the clause is 'it' and the verb is 'closes'.
中文： 名词从句作宾语：短语「what time it closes」作为一个名词从句，担任动词「wonder」的直接宾语。该从句的主语是「it」，动词是「closes」。
Do you know what time the movie starts?
你知道电影几点开始吗？
EN： In English-speaking school environments, asking 'I wonder...' is a very common, polite, and non-demanding way to ask for information or start a conversation, compared to direct questions like 'When does it close?'.
中文： 在英語系國家的學校環境中，使用「I wonder...」（我想知道...）是一種非常常見、禮貌且不具強迫感的詢問資訊或開啟對話的方式，相比直接問「When does it close?」（它什麼時候關門？）顯得更為委婉。
EN： Indirect Questions (Noun Clauses): When a question is embedded within another question or statement (e.g., 'Can you tell me...'), it uses statement word order (subject + verb) instead of question word order. Here, 'how I can sign up for art' is a noun clause acting as the direct object.
中文： 间接问句（名词从句）：当一个问句被嵌入另一个问句或陈述句中时（例如「Can you tell me...」），它必须使用陈述句的语序（主语 + 动词），而非疑问句语序。在此处，「how I can sign up for art」是一个名词从句，作为直接宾语。
Could you tell me where the library is?
你能告诉我图书馆在哪里吗？
EN： Phrasal Verb 'sign up for': This phrasal verb means to register or enroll in a course, activity, or organization. It is followed by the noun representing the activity or class.
中文： 短语动词「sign up for」：此短语动词意为登记或报名参加某个课程、活动或组织。后面接代表该活动或课程的名词。
I want to sign up for the yoga class.
我想报名参加瑜伽课。
EN： In US high schools, 'art' often refers to elective classes which students must actively 'sign up for' (register) during course selection periods, rather than being automatically assigned.
中文： 在美國高中，「art」（美術）通常屬於選修課程。學生必須在選課期間主動「sign up for」（登記報名），而不是由學校自動安排。
EN： The sentence uses an indirect question (noun clause) introduced by 'how' as the direct object of the verb 'explain'. In indirect questions, the word order is subject + verb ('you can join'), not the auxiliary-first order used in direct questions ('how can you join').
中文： 本句使用由引导词「how」引导的间接问句（名词从句），作为动词「explain」的直接宾语。在间接问句中，语序应为「主语 + 动词」（you can join），而非直接问句中的助动词在前语序（how can you join）。
She will show you how you can solve the problem.
她会示范给你看你要如何解决这个问题。
EN： The modal verb 'will' is used here to express a promise, offer, or voluntary action to help the listener in the future.
中文： 情态动词「will」在此处用于表示承诺、主动提供帮助或未来自愿采取的行动。
I will help you carry those heavy books.
我会帮你搬那些很重的书。
EN： In English-speaking academic environments, joining a class or club often involves a specific 'sign-up' or registration process. Using 'explain how' is a polite and helpful way for teachers or peers to guide newcomers through these administrative steps.
中文： 在英語系國家的學校環境中，加入課程或社團通常需要特定的登記或註冊流程。使用「explain how」（解釋如何...）是教師或同學引導新人完成這些行政步驟時，非常禮貌且熱心助人的表達方式。
EN： This sentence uses an indirect question (noun clause) embedded within a direct question. In English, when a question is placed inside another sentence, it loses its question word order (verb + subject) and takes on statement word order (subject + verb). Here, 'who our new principal is' follows the order: question word (who) + subject (our new principal) + verb (is).
中文： 本句使用了嵌入在直接问句中的间接问句（名词从句）。在英文中，当一个问句被置于另一个句子中时，它会失去原本的问句语序（动词 + 主语），而改用陈述句语序（主语 + 动词）。在此处，'who our new principal is' 遵循的顺序为：疑问词 (who) + 主语 (our new principal) + 动词 (is)。
Do you know where the library is?
你知道图书馆在哪里吗？
EN： In English-speaking schools, the 'principal' is the head of the school. Asking about a new principal is a common topic of small talk among students and staff at the beginning of a school year, reflecting interest in leadership changes that might affect school policies or culture.
中文： 在英語系國家的學校中，'principal' 是指校長。在學年初，詢問新校長是學生和教職員之間常見的閒聊話題，這反映了大家對可能影響學校政策或文化的新領導者的關注。
EN： The phrase 'I am not sure' is followed by a noun clause (or indirect question) acting as the complement. It is used to express uncertainty about a specific fact or piece of information.
中文： 「I am not sure」（我不确定）后面常接名词从句（或间接问句）作为补语，用来表达对某个特定事实或信息的不确定性。
I am not sure where they live.
我不确定他们住在哪里。
EN： An indirect question (noun clause) starting with a question word like 'what' uses statement word order (subject + verb) rather than question word order. Here, we use 'what her name is' instead of 'what is her name'.
中文： 以疑问词（如 what）引导的间接问句（名词从句）必须使用陈述句语序（主语 + 动词），而非疑问句语序。因此这里使用「what her name is」，而不是「what is her name」。
Do you know what time the movie starts?
你知道电影几点开始吗？
EN： In English-speaking school environments, it is common and polite to admit when you don't know or remember someone's name. Using 'I am not sure what her name is' sounds softer and more polite than a blunt 'I don't know her name.'
中文： 在英語系國家的學校環境中，坦承自己不知道或不記得某人的名字是很常見且有禮貌的。使用「I am not sure what her name is」聽起來比生硬的「I don't know her name」更加委婉與客氣。
EN： This sentence uses an indirect question (noun clause) introduced by 'why'. In indirect questions, the word order is subject + verb ('the bell rang'), not the auxiliary verb + subject order used in direct questions ('Why did the bell ring?').
中文： 本句使用了由 'why' 引导的间接问句（名词从句）。在间接问句中，语序应为「主语 + 动词」（the bell rang），而非直接问句中所使用的「助动词 + 主语」语序（Why did the bell ring?）。
Could you tell me where the meeting is?
你能告诉我会议在哪里举行吗？
EN： 'Could you tell me...?' is a polite, indirect way to ask for information. Using 'could' instead of 'can' adds a layer of politeness and is commonly used with strangers or in formal/semi-formal situations.
中文： 「Could you tell me...?」是一种礼貌且委婉的询问信息方式。使用「could」代替「can」能增加客气的语气，常用于与陌生人交谈或正式、半正式的场合中。
Could you tell me how to get to the station?
可以请您告诉我如何前往车站吗？
EN： In Western schools, the daily schedule is strictly regulated by automated bells. A bell ringing early is highly unusual and often triggers curiosity or confusion among students and staff, as it disrupts the precise timing of classes and breaks.
中文： 在西方學校中，每日的作息時間是由自動鐘聲嚴格控制的。鐘聲提早響起是非常罕見的情況，通常會引起學生和教職員的好奇或困惑，因為這會打亂課堂和休息時間的精確安排。
EN： The phrase 'have no idea' is a common idiomatic expression meaning 'to not know at all'. It is often followed by a noun clause starting with a question word (like 'why', 'what', or 'where') acting as the object of the preposition 'of' (which is omitted here).
中文： 短语「have no idea」是一个常见的习语，意思是「完全不知道」。后面通常会接由疑问词（如 why、what 或 where）引导的名词从句，作为省略了的介词 of 的宾语。
I have no idea where she went.
我完全不知道她去哪里了。
EN： An indirect question (noun clause) introduced by 'why' follows the statement word order (subject + verb) rather than the question word order (auxiliary verb + subject). Here, 'why it rang' is used instead of 'why did it ring'.
中文： 由「why」引导的间接问句（名词从句）需使用陈述句语序（主语 + 动词），而非疑问句语序（助动词 + 主语）。因此这里使用「why it rang」，而不是「why did it ring」。
Do you know why he left early?
你知道他为什么提前离开吗？
EN： In English-speaking school environments, the ringing of the bell signifies the start or end of a class period. Expressing confusion about the bell ringing early is a common topic of casual conversation among students.
中文： 在英語系的學校環境中，鐘聲代表課堂的開始或結束。對於鐘聲提早響起表示困惑，是學生之間非常常見的閒聊話題。
重要单词附有 IPA 发音、定义、例句和互动式测验。
在本文中： 学校或机构内的自助餐厅、食堂
在本文中： 时间表、日程表
在本文中： 中小学校长
在本文中： 走廊、过道
在本文中： 使想起、提醒
在本文中： 考试（examination 的简称）
在本文中： 想知道、纳闷
在本文中： 解释、说明
片语包含类型标示、双语定义、用法说明和例句。
To register or enroll in something, such as a class, activity, or organization.
报名参加、注册
To not know something at all; to be completely unaware.
毫无头绪、完全不知道
A bus used for transporting students to and from school.
校车
A laboratory used for scientific experiments and research, typically in a school.
科学实验室