EN： The past perfect tense ('had' + past participle) is used to show that an action was completed before another action in the past. In this sentence, 'had tested' happened before the past action 'presented'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個動作或時間點之前就已經完成的動作。在本句中，「測試（had tested）」發生在過去的動作「簡報（presented）」之前。
By the time the train arrived, we had bought our tickets.
在火車到達之前，我們已經買好票了。
EN： 'By the time' is a subordinating conjunction used to introduce a time clause, meaning 'no later than the moment that'. It is commonly paired with the past perfect tense in the main clause to emphasize completion.
中文： 「By the time」是一個從屬連接詞，用來引導時間副詞子句，意思是「在……時候之前」或「到……之時」。主句通常會搭配過去完成式，以強調動作的完成。
By the time she finished her homework, everyone had gone to sleep.
在她寫完功課之前，大家就已經去睡覺了。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前，就已經完成的動作。
By the time the movie started, we had already bought our popcorn.
在電影開始之前，我們就已經買好爆米花了。
EN： The preposition 'for' is used to indicate a duration of time, showing how long an action has been happening.
中文： 介係詞「for」用於表示一段持續的時間，說明某個動作進行了多久。
They lived in Paris for three years before moving to London.
在搬到倫敦之前，他們在巴黎住了三年。
EN： In professional and academic settings, referencing the duration of a project (e.g., 'for two months') is a common way to emphasize the effort, dedication, and depth of work put into a task before its presentation or completion.
中文： 在職場或學術情境中，提及專案的持續時間（例如「兩個月」）是常見的表達方式，用以強調在簡報或完工前，團隊對該任務所投入的努力、專注度與工作深度。
EN： The Past Continuous tense ('was coding') is used to describe an ongoing background action in the past, which is often interrupted by a sudden, completed action in the Simple Past tense ('froze').
中文： 過去進行式（was coding）用於描述過去某個正在進行的背景動作，而這個動作通常會被另一個發生在過去、已完成的突發動作（過去簡單式 froze）所中斷。
While we were watching the movie, the power went out.
當我們正在看電影時，停電了。
EN： The subordinating conjunction 'while' is used to introduce a longer background activity. When the 'while' clause comes at the beginning of the sentence, a comma is required to separate it from the main clause.
中文： 從屬連接詞「while」用於引導時間較長的背景活動。當「while」引導的子句置於句首時，必須使用逗號與主要子句隔開。
While she was cooking dinner, the phone rang.
當她正在做晚飯時，電話響了。
EN： In the tech and software development world, 'coding' is the standard informal term for writing computer programs. The term 'froze' is a common colloquialism used globally to describe a computer screen or application that has become completely unresponsive.
中文： 在科技與軟體開發領域中，「coding」是撰寫電腦程式的標準非正式用語。而「froze」（當機/凍結）是一個全球通用的口語表達，用來形容電腦螢幕或應用程式完全失去響應、無法操作的狀態。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another point in the past. In this sentence, 'had never solved' emphasizes that up until that specific past moment, the experience of solving such a hard problem had not occurred.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個時間點或動作之前已經完成的動作或狀態。在本句中，「had never solved」強調在過去那個特定時刻之前，從未有過解決如此困難問題的經驗。
They had already left when we arrived at the station.
當我們到達車站時，他們已經離開了。
EN： The construction 'such a/an + adjective + singular countable noun' is used to add emphasis, meaning 'of a very high degree' or 'so extreme'.
中文： 「such a/an + 形容詞 + 單數可數名詞」的結構用於加強語氣，表示「如此...的...」或「非常...的...」，用來強調程度之深。
It was such a beautiful day that we decided to go for a picnic.
那是個如此美好的日子，以至於我們決定去野餐。
EN： The Past Perfect tense ('had' + past participle) is used to show that an action was completed before another action in the past. In this sentence, 'had fixed' happened before 'arrived'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個時間點或另一個過去動作之前，就已經完成的動作。在本句中，「修好程式錯誤 (had fixed)」發生在「評審抵達 (arrived)」之前。
Before the movie started, we had already bought our popcorn.
在電影開始之前，我們就已經買好爆米花了。
EN： Adverbial clauses of time introduced by 'before' indicate the sequence of events. The event in the 'before' clause (Simple Past) happened after the event in the main clause (Past Perfect).
中文： 由連接詞 'before'（在……之前）引導的時間副詞子句用來表示事件的先後順序。'before' 子句中的動作（使用簡單過去式）發生在主句動作（使用過去完成式）之後。
Before she went to bed, she had finished her homework.
在她上床睡覺之前，她就已經寫完功課了。
EN： In software engineering and tech culture, 'bug' refers to an error or flaw in a computer program. The term historically originates from actual insects causing electrical shorts in early mechanical computers, but today it is standard industry jargon used globally.
中文： 在軟體工程與科技文化中，「bug」指的是電腦程式中的錯誤或缺陷。這個詞的由來歷史悠久，源於早期機械式計算機中真的有昆蟲（bug）飛入導致電路短路，而現今已成為全球通用的標準行業術語。
EN： The Past Perfect tense ('had' + past participle) is used to show that an action happened before another action in the past. In this sentence, 'had forgotten' happened before the main past action 'realized'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個動作或時間點之前就已經發生的動作。在本句中，「忘記存檔」（had forgotten）發生的時間點早於主句的過去動作「意識到」（realized）。
She realized she had left her keys at the office.
她意識到她把鑰匙忘在辦公室了。
EN： The conjunction 'that' is often omitted in informal spoken and written English when introducing a noun clause functioning as the direct object of verbs like 'realize', 'think', or 'know'.
中文： 在口語或非正式書面語中，引導名詞子句作為「realize（意識到）」、「think（認為）」或「know（知道）」等動詞之直接受詞的連接詞「that」經常會被省略。
I think we made a mistake.
我覺得我們犯了個錯誤。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前就已經完成的動作。
They had finished the report before the meeting started.
在會議開始之前，他們就已經完成了報告。
EN： The phrase 'many times' acts as an adverbial modifier of frequency, indicating how often the action was repeated in the past.
中文： 片語 'many times'（許多次）作為頻率副詞修飾語，用來表示該動作在過去被重複了多少次。
I have visited that museum many times.
我已經參觀過那間博物館許多次了。
EN： The conjunction 'as' is used to describe two actions happening at the same time, often implying that one event is developing alongside another. It is similar to 'while' or 'when'.
中文： 連接詞「as」用於描述兩個同時發生的動作，通常暗示一個事件伴隨著另一個事件的發展而進行。其用法類似於「while」或「when」。
As the sun set, the temperature dropped quickly.
當太陽下山時，氣溫迅速下降。
EN： The Past Continuous tense (was/were + verb-ing) is used to describe an action that was in progress at a specific point in the past, emphasizing the duration or the ongoing nature of the activity.
中文： 過去進行式（was/were + 現在分詞）用於描述在過去某個特定時間點正在進行的動作，強調該活動的持續性或進行狀態。
They were laughing when the movie started.
電影開始時，他們正在大笑。
EN： In technology and startup culture, a 'demo' (demonstration) is a high-stakes moment where creators show their working product to an audience or judges. The phrase 'hearts were racing' is a common idiom used to describe intense anxiety, excitement, or anticipation during such critical moments.
中文： 在科技與創業文化中，「demo」（產品示範）是一個關鍵時刻，創作者必須向觀眾或評審展示實際運作的產品。片語「hearts were racing」（心跳加速）是常用的成語，用來形容在這種關鍵時刻極度緊張、興奮或期待的心情。
EN： The Past Perfect tense ('had' + past participle) is used to show that an action was completed before another action in the past. In this sentence, 'had prepared' happened before 'won'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個動作或時間點之前就已經完成的動作。在本句中，「事前準備」（had prepared）發生在「贏得比賽」（won）之前。
She passed the exam because she had studied hard.
她通過了考試，因為她事前非常努力讀書。
EN： The subordinating conjunction 'because' introduces an adverbial clause of cause or reason, explaining why the action in the main clause ('We won') occurred.
中文： 從屬連接詞「because」（因為）引導原因狀語從句，用來解釋主句動作（We won）發生的原因。
We stayed home because it was raining.
我們待在家裡，因為當時正在下雨。
EN： The past perfect tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前，就已經完成的動作或狀態。
By the time the movie started, we had already bought our popcorn.
在電影開始之前，我們就已經買好爆米花了。
EN： The verb 'prove' can be used with an object and an object complement (adjective) to show that someone or something is demonstrated to have a certain quality.
中文： 動詞 'prove'（證明）後面可接賓語（受詞）與賓語補語（形容詞），用來表示某人或某事被證實具有某種特質或狀態。
Her dedication proved them wrong.
她的奉獻證明他們錯了。
EN： The Past Perfect tense ('had' + past participle) is used to show that an action was completed before another action in the past. In this sentence, 'had finished' happened before 'felt'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個時間點或另一個過去動作之前已經完成的動作。在本句中，「完成」(had finished) 發生在「感到」(felt) 之前。
After she had left, we started the meeting.
在她離開之後，我們才開始開會。
EN： The verb 'feel' is a linking verb (copula) that is followed by an adjective (proud) rather than an adverb, to describe the subject's state. 'Truly' is an adverb modifying the adjective 'proud'.
中文： 動詞「feel」（感覺）是一個連繫動詞，後面接形容詞（proud）而非副詞，用來描述主詞的狀態。而「truly」則是副詞，用來修飾形容詞「proud」。
They felt extremely happy about the results.
他們對結果感到無比快樂。
EN： The verb 'teach' can take a double object (ditransitive structure) or, as in this case, an indirect object ('us') followed by a noun clause introduced by 'that' acting as the direct object.
中文： 動詞「teach」（教導）可以接雙賓語結構。在本句中，間接賓語為「us」（我們），而由引導詞「that」所引導的名詞子句「that effort pays off」則作為直接賓語。
Experience taught me that patience is a virtue.
經驗教會了我，耐心是一種美德。
EN： The phrasal verb 'pay off' is an intransitive idiom meaning to yield good results or succeed after effort has been made.
中文： 片語動詞「pay off」在此處作不及物動詞使用，為固定片語，意思是「（努力等）得到回報、取得成功」。
All her hard work finally paid off when she passed the exam.
當她通過考試時，她所有的努力終於得到了回報。
EN： The phrase 'effort pays off' reflects a strong cultural value in English-speaking societies (and many others) emphasizing meritocracy and the belief that hard work eventually leads to success. It is a common motivational idiom used in educational and professional settings.
中文： 「effort pays off」（努力終有回報）這句話反映了英語系國家（以及許多其他文化）中強調「功績主義」與「一分耕耘，一分收穫」的價值觀。這是在教育和職場環境中非常常見的勵志用語。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前就已經完成的動作。
By the time the movie started, we had already bought our popcorn.
在電影開始之前，我們就已經買好爆米花了。
EN： The verb 'spend' is followed by a time expression and then a gerund (V-ing) to indicate how time was used to perform an activity.
中文： 動詞 'spend'（花費時間）後面接時間表達式，再接動名詞（V-ing），用來表示花費時間進行某項活動。
She spent two hours studying for the biology exam.
她花了兩個小時準備生物考試。
EN： A 'science fair' is a highly common competitive event in American schools where students present science project reports and models. It emphasizes hands-on learning, teamwork, and public speaking skills from a young age.
中文： 「科學展覽」（science fair）是美國學校中非常普遍的競賽活動，學生在活動中展示自己的科學專題報告和模型。這項活動從小就培養學生的動手實作能力、團隊合作精神以及口語表達技巧。
EN： The Past Perfect Tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前，就已經完成的動作。
By the time the teacher arrived, we had finished the experiment.
在老師到達之前，我們就已經完成了實驗。
EN： A Relative Clause starting with 'that' is used here as an adjective clause to modify the noun 'model'. Since 'that' acts as the subject of the clause, it cannot be omitted.
中文： 由關係代名詞 'that' 引導的關係子句（形容詞子句），在此處用來修飾名詞 'model'（模型）。因為 'that' 在子句中擔任主詞，所以不能省略。
They designed a system that saves water.
他們設計了一個能省水的系統。
EN： In modern science fairs and academic competitions, there is a strong emphasis on sustainability and renewable energy ('clean power'). Presenting projects related to solar energy reflects a widespread global educational trend focusing on green technology and environmental awareness.
中文： 在現代的科學展覽與學術競賽中，非常強調永續發展與再生能源（即「乾淨能源」）。展示與太陽能相關的專案，反映了全球教育界對綠色科技與環保意識的高度重視。
EN： The past perfect tense ('had' + past participle) is used to describe an action that was completed before another action in the past. In this sentence, 'had tested' happened before the judges 'came'.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或時間點之前就已經完成的動作。在本句中，「測試（had tested）」發生在「評審抵達（came）」之前。
By the time the movie started, we had already bought our popcorn.
在電影開始之前，我們就已經買好爆米花了。
EN： The conjunction phrase 'by the time' means 'no later than the moment that' and is used to establish a time limit or deadline in the past or future. When referring to the past, the clause following 'by the time' uses the simple past tense, while the main clause uses the past perfect tense.
中文： 連接詞片語「by the time」意為「在...時候之前」或「到...為止」，用於表示過去或未來某個時間點的截止期限。當描述過去的事情時，緊跟在「by the time」後面的子句使用簡單過去式，而主句則使用過去完成式。
By the time Emma arrived at the station, the train had left.
在艾瑪到達車站之前，火車就已經開走了。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or point in time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個時間點或另一個過去動作之前，就已經完成的動作或狀態。
By the time the guests arrived, we had already cleaned the house.
在客人到達之前，我們就已經把房子打掃乾淨了。
EN： The verb 'stop' followed by a gerund (verb-ing) means to cease performing an action or activity.
中文： 動詞 'stop' 後面接動名詞（V-ing），表示停止正在進行的某個動作或活動。
The baby stopped crying when he saw his mother.
寶寶看到媽媽時就停止哭泣了。
EN： The past continuous tense (was/were + verb-ing) is used to describe an action that was in progress at a specific moment in the past, often interrupted by another shorter action in the simple past tense.
中文： 過去進行式（was/were + 動詞-ing）用於描述在過去某個特定時刻正在進行的動作，這個動作通常會被另一個使用簡單過去式的較短動作所中斷。
While she was reading a book, the phone rang.
當她正在看書時，電話響了。
EN： The subordinating conjunction 'while' is used to introduce a time clause describing a longer background action, typically using a continuous tense.
中文： 從屬連接詞「while」（當……時）用於引導時間副詞子句，描述一個較長的背景動作，通常與進行式連用。
While they were playing soccer, it started to rain.
當他們正在踢足球時，開始下雨了。
EN： The past perfect tense ('had' + past participle) is used to describe an action that was completed before another action or point in the past. Here, 'had almost given up' happened before the decision to try again ('decided').
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或時間點之前就已經完成的動作。在此句中，「幾乎快要放棄」（had almost given up）發生在「決定再試一次」（decided）之前。
By the time the teacher arrived, we had already finished the exercise.
在老師到達之前，我們就已經完成了練習。
EN： The phrasal verb 'give up' means to stop trying to do something. When used with 'almost', it indicates that the action of stopping was very close to happening but did not actually occur.
中文： 片語動詞「give up」意思是停止嘗試、放棄。當與副詞「almost」（幾乎）連用時，表示放棄這個動作差一點就要發生，但實際上並沒有發生。
She never gives up on her dreams, no matter how hard it gets.
無論變得多麼困難，她都絕不放棄自己的夢想。
EN： The Past Perfect tense ('had' + past participle) is used to show that an action was completed before another action in the past. In this sentence, 'had fixed' happened before 'glowed'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個動作或時間點之前已經完成的動作。在本句中，「修好（had fixed）」發生在「發光（glowed）」之前。
After we had finished our homework, we went out to play.
在我們寫完功課之後，我們就出去玩了。
EN： Adverbial clauses of time introduced by 'after' describe the sequence of events. When the 'after' clause comes first, it is separated from the main clause by a comma.
中文： 由連接詞「after（在……之後）」引導的時間副詞子句，用來描述事件發生的先後順序。當 after 引導的子句放在句首時，與主要子句之間需用逗號隔開。
After she had saved enough money, she bought a new laptop.
在她存夠錢之後，她買了一台新筆記型電腦。
EN： The Past Perfect Tense (had + past participle) is used here to describe an experience or state that occurred before a specific point in the past. Combined with 'never', it emphasizes that this was a completely new experience up to that moment.
中文： 過去完成式（had + 過去分詞）在此處用於描述在過去某個特定時間點之前所發生或未曾發生的經驗。與 'never'（從未）連用，強調直到那一刻為止，這是一個全新的體驗。
She had never seen such a beautiful sunset before that trip.
在那次旅行之前，她從未見過如此美麗的日落。
EN： The structure 'so + adjective' is used to emphasize the degree of a feeling or state. 'Relieved' is a participial adjective describing the emotional state of feeling relaxed because something difficult or unpleasant has stopped or not happened.
中文： 「so + 形容詞」的結構用於強調某種感覺或狀態的程度。'Relieved'（如釋重負的、寬心的）是一個分詞形容詞，用來描述因困難或令人不快的事情停止或未發生而感到輕鬆的情緒狀態。
We were so relieved to hear that everyone was safe.
聽到大家平安無事，我們感到非常如釋重負。
EN： Adverbial clauses of time introduced by 'when' are used to show that two actions happened at the same time or one immediately after another in the past. In this sentence, both 'watched' and 'worked' are in the simple past tense, indicating simultaneous past actions.
中文： 由連接詞「when」（當……時）引導的時間副詞子句，用來表示兩個動作在過去同時發生，或一個動作緊接著另一個動作發生。在此句子中，主要子句與從屬子句皆使用過去簡單式（watched 和 worked），表示過去同時發生的狀態或動作。
When the teacher entered the classroom, the students stopped talking.
當老師走進教室時，學生們便停止了交談。
EN： Adverbs of manner (like 'perfectly') are used to describe how an action is performed. They typically modify verbs and are placed after the verb or the object. Here, 'perfectly' modifies the verb 'worked'.
中文： 情狀副詞（如「perfectly」）用來修飾動詞，表示動作進行的方式或狀態。它們通常放在所修飾的動詞或受詞之後。在本句中，「perfectly」修飾動詞「worked」，表示運作得極為完美。
She plays the piano beautifully.
她鋼琴彈得很優美。
EN： In academic and professional settings (such as science fairs, hackathons, or product launches), a 'demo' (demonstration) is a crucial event where creators show their working prototype to judges or clients. The phrase 'everything worked perfectly' carries a sense of immense relief, as live demos are notoriously prone to unexpected technical glitches (often humorously referred to as the 'demo effect').
中文： 在學術或專業場合（如科學展覽、黑客松或產品發表會）中，「demo」（產品演示/實機展示）是一個關鍵環節，創作者必須向評審或客戶展示實際運作的模型。句子中「everything worked perfectly」（一切都運作得非常完美）透露出極大的鬆了一口氣的感覺，因為現場演示極易出現意料之外的技術故障（在科技界常被幽默地稱為「演示效應」或「莫非定律」）。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前，就已經完成的動作。
They had finished the report before the meeting started.
在會議開始之前，他們就已經完成了報告。
EN： The conjunction 'until' is used to show that an activity or situation continues up to a particular time or event. In this sentence, 'felt' is the past simple of 'feel', linking to the adjective 'natural' as a copular (linking) verb.
中文： 連接詞「until」（直到……為止）用於表示某個活動或狀態持續到特定時間或事件。在此句中，「felt」是「feel」的過去式，作為連繫動詞連接形容詞「natural」。
We waited in the office until the rain stopped.
我們在辦公室裡一直等到雨停。
EN： In academic and professional presentations in English-speaking cultures, 'natural' delivery is highly valued. It implies that the speakers have practiced enough to sound conversational and confident, rather than sounding like they are reading from a memorized script.
中文： 在英語系國家的學術與專業簡報文化中，非常看重「自然」（natural）的表達方式。這意味著講者經過充分練習，使說話聽起來像在自然對話且充滿自信，而不是在背誦死板的講稿。
EN： The conjunction 'although' is used to introduce a subordinate clause of concession, showing a contrast. In English, 'although' and 'but' cannot be used in the same sentence to connect two clauses; only one of them is used.
中文： 連接詞「although」（雖然）用於引導讓步從屬子句，表示對比。在英文中，「although」和「but」（但是）不能在同一個句子中同時使用來連接兩個子句，只能擇一使用。
Although it was raining, we went for a walk.
雖然下著雨，我們還是去散步了。
EN： The past perfect tense ('had' + past participle) is used to show that an action was completed before another action or time in the past. Here, 'had learned' emphasizes the knowledge gained prior to the end of the competition or the moment of reflection.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個動作或時間點之前已經完成的動作。在這裡，「had learned」強調在比賽結束或反思的那個時刻之前，我們就已經學到了很多東西。
By the time the movie started, we had already bought our popcorn.
在電影開始之前，我們就已經買好爆米花了。
EN： The verb 'show' can take a double object (ditransitive structure): 'show + indirect object (me) + direct object (what...)'. In this sentence, the direct object is a noun clause introduced by the interrogative word 'what'.
中文： 動詞「show」可接雙賓語（雙賓動詞結構）：「show + 間接賓語 (me) + 直接賓語 (what...)」。在本句中，直接賓語是由疑問詞「what」引導的名詞子句。
She showed me what true friendship means.
她讓我明白真正的友誼意味著什麼。
EN： The noun clause 'what patience and teamwork can do' acts as the direct object. Within this clause, 'what' functions as the object of the verb 'do', representing the potential achievements or impact of patience and teamwork.
中文： 名詞子句「what patience and teamwork can do」作為直接賓語。在此子句中，「what」作為動詞「do」的賓語，代表耐心與團隊合作所能達到的成就或產生的影響。
I want to see what this machine can do.
我想看看這台機器能做些什麼。
EN： The past simple tense of the verb 'to be' (was/were) is used to ask about states or emotions in the past. In questions, the verb 'were' is placed before the subject 'you'.
中文： 過去簡單式的 be 動詞（was/were）用於詢問過去的狀態或情緒。在疑問句中，動詞「were」要置於主詞「you」之前。
Why were you so late yesterday?
你昨天為什麼遲到那麼久？
EN： The word 'so' is used as an intensifier before adjectives (like 'nervous') to mean 'to such a great degree' or 'very'.
中文： 「so」在形容詞（如「nervous」）前用作修飾語（加強語氣），表示「如此地」或「非常」。
She was so happy to hear the news.
她聽到這個消息時非常高興。
EN： In English-speaking cultures, addressing someone directly by their first name (like 'Emma') at the end of a question is a common way to show empathy, direct connection, and personal care, especially when asking about their feelings.
中文： 在英語系國家中，在問句句尾直接稱呼對方的名字（如「艾瑪」）是一種很常見的表達方式，能展現同理心、拉近彼此距離並表達個人關懷，特別是在詢問對方的感受時。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or point in time in the past. In this sentence, 'had broken' indicates that the breakdown occurred before the reference point of the story (the next day's presentation).
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或時間點之前就已經完成的動作。在本句中，「had broken」（已經壞掉）表示故障發生在故事參考點（隔天的簡報）之前。
The train had already left when I arrived at the station.
當我到達車站時，火車已經開走了。
EN： Starting a sentence with 'Because' is common in spoken English as a direct, elliptical answer to a 'Why' question, even though it forms a dependent clause (sentence fragment) in formal writing.
中文： 在英語口語中，以「Because」（因為）開頭來直接回答「Why」（為什麼）的提問是非常常見的省略表達，儘管在正式寫作中這會被視為非完整句（從屬子句）。
Why did you leave early? Because I was feeling unwell.
你為什麼提早離開？因為我身體不太舒服。
EN： In science fairs and academic presentations, technical failures right before the event (often jokingly referred to as 'the demo effect' or 'Murphy's Law') are a common and highly relatable source of anxiety for students and presenters.
中文： 在科學展覽和學術簡報中，活動前夕發生的技術故障（通常被戲稱為「展示效應」或「莫非定律」）是學生和簡報者非常普遍且容易引起共鳴的焦慮來源。
EN： The Past Perfect Tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前，就已經完成的動作。
They had finished the report before the meeting started.
在會議開始之前，他們就已經完成了報告。
EN： The preposition 'before' is used to introduce a point in time or an event that occurs after the action described in the main clause.
中文： 介係詞「before」（在……之前）用來引出一個時間點或事件，該事件發生在主句所描述的動作之後。
Please wash your hands before dinner.
晚餐前請先洗手。
EN： The phrase 'by the time' is a subordinating conjunction used to introduce a time clause. It indicates that an action was already completed before a specific point in time in the past or future. When referring to the past, the 'by the time' clause uses the Simple Past tense, while the main clause uses the Past Perfect tense (had + past participle).
中文： 「by the time」（到……時候為止）是一個從屬連接詞，用來引導時間副詞子句，表示在過去或未來的某個特定時間點之前，另一個動作已經完成。當指過去的事情時，「by the time」子句使用簡單過去式，而主句則使用過去完成式（had + 過去分詞）。
By the time the movie ended, she had fallen asleep.
到電影結束時，她已經睡著了。
EN： The Past Perfect tense ('had started') is used to emphasize that an action was completed before another action or time in the past. It helps to establish a clear chronological order of events.
中文： 過去完成式（如「had started」）用於強調某個動作在過去的另一個動作或時間點之前就已經完成。這有助於建立事件之間清晰的時間先後順序。
The train had left when I reached the station.
當我到達車站時，火車已經開走了。
EN： The Past Perfect tense ('had' + past participle) is used to show that an action happened before another action in the past. In this sentence, leaving the notes ('had left') happened before realizing it ('realized').
中文： 過去完成式（had + 過去分詞）用於表示某個動作在過去的另一個動作或時間點之前已經完成。在此句子中，「遺忘筆記」（had left）發生在「意識到」（realized）之前。
She realized she had lost her keys.
她意識到她把鑰匙弄丟了。
EN： The conjunction 'that' is often omitted in informal English when introducing a noun clause functioning as the direct object of verbs like 'realize', 'think', or 'say'. Here, 'I had left my notes at home' is the object clause.
中文： 在非正式英語中，引導名詞子句作為「realize（意識到）」、「think（認為）」或「say（說）」等動詞的直接受詞時，連接詞「that」經常會被省略。在此處，「I had left my notes at home」即為受詞子句。
I think we made a mistake.
我想我們犯了一個錯誤。
EN： The Past Perfect tense ('had' + past participle) is used to describe an action that was completed before another action or a specific time in the past. In this sentence, 'had practiced' happened before the past event 'the show'.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個動作或特定時間點之前就已經完成的動作。在本句中，「已經練習」（had practiced）發生在過去的事件「演出」（the show）之前。
They had already eaten dinner before the guests arrived.
在客人到達之前，他們已經吃過晚餐了。
EN： The preposition 'for' is used to indicate a duration of time, showing how long an action lasted. Here, 'for hours' specifies the length of the practicing session.
中文： 介係詞「for」用於表示一段持續的時間，顯示某個動作持續了多久。在這裡，「for hours」（好幾個小時）明確指出了練習時間的長度。
She studied for three hours last night.
她昨天晚上讀書讀了三個小時。
EN： The Past Perfect tense ('had + past participle') is used to show that an action was completed before another action in the past. In this sentence, 'had fixed' happened before 'ran'.
中文： 過去完成式（had + 過去分詞）用於表示在過去某個時間點或動作之前已經完成的動作。在此句子中，「修好程式碼 (had fixed)」發生在「運行得好 (ran)」之前。
After she had finished her homework, she went to bed.
在她寫完功課之後，她就去睡覺了。
EN： Adverbial clauses of time introduced by 'after' indicate the sequence of events. When the 'after' clause comes first, a comma is used to separate it from the main clause.
中文： 由連接詞「after (在...之後)」引導的時間副詞子句，用來表示事件發生的先後順序。當副詞子句放在句首時，主句前必須加上逗號隔開。
After we had eaten dinner, we took a walk.
在我們吃完晚餐後，我們去散了步。
EN： The Past Perfect Tense (had + past participle) is used to describe an action that was completed before a specific point in the past. In this sentence, 'had never expected' indicates that the expectation (or lack thereof) occurred prior to the moment the result was revealed.
中文： 過去完成式（had + 過去分詞）用於描述在過去某個特定時間點之前已經完成的動作。在本句中，「had never expected」（從未預料到）表示這種「沒有預料到」的心態，存在於結果揭曉（過去的某個時刻）之前。
She had never seen such a beautiful sunset before she visited Greece.
在她去希臘旅遊之前，她從未見過如此美麗的日落。
EN： The determiner 'such' is used with 'a/an' and a singular countable noun (such + a/an + adjective + noun) to emphasize the degree or quality of something, meaning 'of this kind' or 'so'.
中文： 限定詞「such」與「a/an」及單數可數名詞連用（such + a/an + 形容詞 + 名詞），用來強調某事物的程度或特質，意為「如此的」或「這樣的」。
It was such a difficult decision that we had to think it over.
那是個如此艱難的決定，以至於我們必須仔細考慮。
EN： In competitive contexts (like sports, elections, or science fairs), 'a close result' or 'a close call' highlights the intense competition where the winner and loser had very little difference in scores or performance. Expressing humility and surprise at a close victory is a common cultural norm in English-speaking academic and professional settings.
中文： 在競爭激烈的環境中（如體育賽事、選舉或科學展覽），「a close result」（勢均力敵的結果）或「a close call」（險勝/千鈞一髮）強調了雙方分數或表現差距極小的激烈競爭。在英語系的學術與專業場合中，對險勝表達謙遜與驚訝是一種常見的社交禮儀。
EN： The Past Perfect Tense (had + past participle) is used to show that an action was completed before another action in the past. In this sentence, 'had not given up' happened before the action of winning ('won').
中文： 過去完成式（had + 過去分詞）用於表示在過去某個動作或時間點之前就已經完成的動作。在本句中，「沒有放棄（had not given up）」發生在「贏了（won）」這個過去動作之前。
They had already left when we arrived at the station.
當我們到達車站時，他們已經離開了。
EN： The subordinating conjunction 'because' is used to introduce a clause that states the reason for the action in the main clause. Here, it connects the result ('We won') with the cause ('we had not given up').
中文： 從屬連接詞「because（因為）」用於引導表示原因的從屬子句，說明主句動作發生的原因。在此處，它將結果（我們贏了）與原因（我們沒有放棄）連接起來。
She stayed home because it was raining heavily.
她待在家裡，因為雨下得很大。
EN： In English-speaking cultures, perseverance and 'never giving up' are highly celebrated values, especially in sports, academics, and personal achievements. Expressing success as a result of collective persistence (using 'we') emphasizes teamwork and shared effort over individual talent.
中文： 在英語系國家中，堅持不懈與「永不放棄」是被高度推崇的價值觀，不論是在體育、學術還是個人成就上。將成功歸因於團隊的堅持（使用「we」），更強調了團隊合作與共同努力，而非僅僅是個人才華。
EN： The phrase 'looking back' is a dangling participle used as an introductory adverbial phrase. It is a shortened form of 'when we look back' or 'as I look back', used to set the reflective tone of the sentence.
中文： 「Looking back」（回首過去）是一個分詞短語，用作引導性的副詞片語。它是「when we look back」或「as I look back」的簡化形式，用於奠定句子反思的基調。
Looking back, I realize how much I have grown.
回首過去，我意識到自己成長了多少。
EN： The past perfect tense ('had changed') is used to emphasize that the change occurred and was completed before a specific point in the past, or to highlight the lasting impact of a past event on a subsequent past state.
中文： 過去完成式（had + 過去分詞，此處為「had changed」）用於強調該改變發生在過去某個特定時間點之前並已完成，或用以突出過去某事件對隨後過去狀態的深遠影響。
By the time we graduated, that teacher had changed our lives.
在我們畢業之前，那位老師就已經改變了我們的人生。
EN： In English-speaking professional and academic cultures, 'looking back' or self-reflection is highly valued. It is common to conclude a presentation, project, or story by reflecting on personal growth and lessons learned, emphasizing teamwork and transformation over just the final product.
中文： 在英語系國家的職場與學術文化中，「looking back」（回顧/反思）是非常受到重視的環節。在簡報、專案或故事的結尾，人們習慣分享個人成長與學到的教訓，強調團隊合作與心態轉變，而不僅僅是最終的成果。
重要單字附有 IPA 發音、定義、例句和互動式測驗。
在本文中： 報告；發表；簡報
在本文中： （電腦螢幕）當機；凍結不動
在本文中： 意識到；明白
在本文中： 懷疑；對……表示懷疑
在本文中： 努力；付出
在本文中： 裝置；設備；儀器
在本文中： 寬慰的；鬆了一口氣的
在本文中： 耐心；毅力
片語包含類型標示、雙語定義、用法說明和例句。
To yield good results; to succeed.
得到回報；取得成功
To stop trying to do something; to surrender.
放棄
To show that someone is incorrect by presenting facts or achieving success.
證明某人是錯的
To think about or reflect on something that happened in the past.
回顧；回想