It Must Be a Clue (H2)
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EN: The present perfect tense (has/have + past participle) is used here with 'left' (though expressed as simple past 'left' in casual speech, it implies a present result). 'Left' is the past tense of 'leave', meaning to allow something to remain in a place.
I left my keys on the kitchen table.
EN: The interrogative pronoun 'Whose' is used to ask about possession. In the question 'Whose can it be?', 'whose' acts as a possessive pronoun meaning 'whose bag', and 'can' is a modal verb used to express possibility or speculation.
Whose is this jacket?
EN: The modal verb 'might' is used to express a weak possibility or uncertainty about a present or future situation. It suggests that something is possible, but not certain.
It might rain later, so you should take an umbrella.
EN: The phrasal verb 'belong to' means to be the property of someone. It is a stative verb, meaning it is not typically used in the continuous (-ing) tenses.
This book belongs to Sarah.
EN: The modal verb 'can't' (cannot) is used to express a strong negative deduction or certainty based on evidence. It means 'it is impossible that...'.
It can't be raining; the sky is completely clear.
EN: Possessive pronouns (such as 'mine', 'yours', 'his', 'hers', 'ours', 'theirs') are used to replace a possessive adjective and a noun to avoid repetition. Here, 'mine' replaces 'my bag'.
Your car is red, but mine is green.
EN: The modal verb 'must' is used here to express a strong logical deduction or certainty based on evidence. It translates to '一定' (must be) in this context.
She must be tired after working all day.
EN: The preposition 'with' is used to indicate the cause or reason for a state (in this case, being heavy). It means '因為...' or '伴隨著...'.
His hands were shaking with cold.
EN: The modal verb 'could' is used here to express a weak or tentative possibility in the present. It suggests that something is possible, but the speaker is not entirely certain.
The keys could be in your coat pocket.
EN: The prepositional phrase 'in the library' acts as an adverbial of place, indicating the location of the subject. It consists of the preposition 'in' followed by the noun phrase 'the library'.
The students are studying in the library.
EN: The modal structure 'might have + past participle' is used to express a weak or uncertain possibility about a past event. It suggests that something possibly happened, but the speaker is not entirely sure.
He might have missed the bus this morning.
EN: The preposition 'after' is used here as a preposition of time, meaning 'subsequent to' or 'later than' a specific event (in this case, 'class').
We went for a walk after dinner.
EN: The modal verb 'can't' (cannot) is used to express a strong negative deduction or certainty. When we say 'it can't be...', we are 99% sure that something is impossible based on present evidence.
It can't be raining; the sky is completely clear.
EN: The verb 'hear' is a verb of perception. It can be followed directly by an object ('something') and an adverbial of place ('inside') to describe what is being perceived and where.
I hear a strange noise outside.
EN: The modal verb 'must' is used here to express a strong logical deduction or certainty based on evidence. It translates to 'must be' or 'definitely is' in this context.
The lights are on, so they must be home.
EN: The present participle (verb-ing) 'rattling' acts as an object complement, describing the action or state of the noun 'water bottle' at the moment of perception.
I can hear the rain falling on the roof.
EN: The modal verb 'may' is used to express possibility or uncertainty in the present or future. It suggests that something is possible but not certain (about a 50% chance). It is followed by the base form of the verb.
It may rain later, so you should take an umbrella.
EN: The verb 'give' is a ditransitive verb, which means it can take two objects: an indirect object (usually a person, here 'us') and a direct object (usually a thing, here 'a clue'). The typical pattern is 'give + indirect object + direct object'.
She gave me a beautiful book.
EN: The modal verb 'could' is used here to express a weak or tentative possibility in the present or future, meaning 'it is possible that'. It is less certain than 'may' or 'must'.
It could rain later, so you should take an umbrella.
EN: The phrasal verb 'belong to' means to be the property of someone. It is a non-progressive (stative) verb, meaning it is not typically used in the continuous (-ing) tenses.
This bicycle belongs to my brother.
EN: The modal verb 'must' combined with the continuous aspect 'be + -ing' (must be doing) is used to express a strong, logical deduction about an action that is likely happening right now. It indicates that the speaker is almost certain about the current activity based on evidence.
She must be sleeping now because her room is completely dark.
EN: The phrasal verb 'look for' means to search for something or someone. When used with a pronoun object like 'it', the pronoun must be placed directly after the preposition 'for' (look for it).
I lost my keys and I am looking for them.
EN: The structure 'Let's + base verb' is used to make a suggestion or proposal that includes the speaker. It is a contraction of 'Let us'.
Let's start the meeting now.
EN: Tag questions with 'Let's' typically use 'shall we?' to politely ask for agreement or confirmation, making the suggestion sound softer and more cooperative.
Let's go for a walk, shall we?
EN: In British and Commonwealth English, 'shall we?' is a very common and natural way to end a suggestion starting with 'Let's'. In American English, it is also widely used, though sometimes 'okay?' or 'should we?' might be heard in more casual contexts. Using 'shall we?' adds a touch of politeness and collaborative spirit.
EN: The Simple Past Tense is used to describe actions that were completed at a specific time in the past. In this sentence, 'found' is the irregular past tense form of the verb 'find'.
Yesterday I found a lost wallet on the street.
EN: Time expressions like 'this morning' can function as adverbial modifiers. They are often placed at the very beginning or the very end of a sentence to establish the timeframe of the event.
This morning she drank a cup of black coffee.
EN: The coordinating conjunction 'so' is used to connect two independent clauses, showing a cause-and-effect relationship where the second clause is the result of the first.
It was raining, so we stayed indoors.
EN: An indirect question is used inside another sentence (here, as the object of 'wondered'). Unlike direct questions, indirect questions use statement word order (subject + verb) instead of question word order.
I wondered where she lived.
EN: The coordinating conjunction 'so' is used to connect two independent clauses, showing a cause-and-effect relationship where the second clause is the result of the first.
The weather was bad, so we stayed indoors.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a present or future situation, followed by the base form of the verb 'be'.
It is cloudy, so it might rain later.
EN: The modal verb 'couldn't' is used to express a strong negative deduction or impossibility in the past or present based on evidence.
It couldn't be Ryan's jacket; his is much larger.
EN: The subordinating conjunction 'because' is used to introduce a clause that gives the reason for the action or state in the main clause.
Sarah was late because she missed the bus.
EN: In English-speaking school cultures, communication between teachers and students is often polite but can be relatively informal. However, 'casual' language (like slang or highly informal text-speak) is still generally avoided by teachers in official or written contexts, which is why the speaker deduces the note wasn't written by a teacher.
EN: The modal verb 'must' is used here to express a strong logical assumption or high probability based on evidence. It translates to '一定...' (must be) in this context.
She must be tired after the long trip.
EN: The relative pronoun 'who' introduces a defining relative clause ('who knows my schedule well') that modifies the noun 'someone'. It acts as the subject of the relative clause.
I am looking for a teacher who speaks English fluently.
EN: The verb 'say' is commonly used in English to report written text, signs, or messages, where in Chinese we would typically translate it as '寫著' (written) or '寫到' (says/reads).
The sign says 'No Parking'.
EN: The modal verb 'can' is used here to express ability or possibility. In the encouraging phrase 'You can do it!', it serves to motivate someone by emphasizing their capability to succeed.
I believe you can pass the driving test.
EN: In English-speaking school culture, it is very common for friends, classmates, or teachers to leave small encouraging notes (sometimes called 'sticky notes' or 'cheer cards') on someone's desk before a major exam or sports event to boost their morale.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a present or future situation. It is followed by the base form of the verb (in this case, 'be').
It might rain later, so you should take an umbrella.
EN: Present participle phrases (verb-ing) can function as adjectives to modify a preceding noun. Here, 'sitting near me' is a participle phrase modifying the noun 'classmate', describing an ongoing state or action.
The girl standing by the door is my sister.
EN: The modal verb 'could' is used here to express a weak or uncertain possibility in the present. It suggests that something is possible, but the speaker is not entirely sure.
It could rain later, so you should take an umbrella.
EN: The conjunction 'since' is used to introduce a clause that gives the reason for something, functioning similarly to 'because' or 'as'.
Since we have some free time, let's grab a cup of coffee.
EN: The phrasal verb 'cheer someone on' is a common expression in English-speaking cultures, reflecting a supportive and encouraging social dynamic. It is often used in both sports contexts and everyday life to show emotional support for someone's efforts.
EN: The compound relative pronoun 'whoever' is used here to introduce an adverbial clause meaning 'no matter who'. It indicates that the identity of the person does not change the main fact.
Whoever made this cake is a great baker.
EN: The modal structure 'must have + past participle' is used to express a strong logical deduction or certainty about a past event.
She must have left her keys at the office.
EN: The modal verb 'can' is used here to express theoretical possibility or general truth, indicating that even small actions have the potential to produce a significant impact.
Regular exercise can improve your health.
EN: The phrase 'mean so much' uses the verb 'mean' (to have importance or value) modified by 'so much' (to a great degree) to express deep emotional significance or value.
Your support means so much to our team.
EN: In English-speaking cultures, 'acts of kindness' (often referred to as 'random acts of kindness') are highly celebrated. There is a strong cultural emphasis on how small, everyday gestures—like holding the door or giving a compliment—can positively impact a community.
EN: The modal structure 'may have + past participle' is used to express a possibility or make a guess about a past event. It suggests that something was possible in the past, but the speaker is not 100% certain.
She may have missed the bus this morning.
EN: The word 'whole' is an adjective used before a singular noun to emphasize that the entirety of something is being referred to. It is often preceded by a possessive determiner (like 'my', 'his') or the definite article 'the'.
He ate the whole cake by himself.
EN: In English-speaking cultures, leaving anonymous encouraging notes (like 'You can do it!') is a common, warm gesture of kindness in schools and workplaces to boost morale. The phrase 'changed my whole day' is a common idiom meaning a small positive event completely turned a bad or mediocre day into a great one.
EN: An indirect question is a question embedded inside another statement or question (e.g., 'who sent it' inside 'I still don't know...'). Unlike direct questions, indirect questions use statement word order (subject + verb) rather than question word order.
Do you know where she lives?
EN: The coordinating conjunction 'but' is used to connect two independent clauses that present contrasting ideas. In this sentence, it connects 'I still don't know who sent it' with 'I am grateful'.
The test was difficult, but he passed it.
EN: The word 'whose' is an interrogative possessive determiner used to ask who owns something. It is followed directly by the noun it modifies (e.g., 'whose phone').
Whose car is parked outside?
EN: The present continuous tense ('is ringing') is used to describe an action that is happening right now at the moment of speaking.
The baby is sleeping in the room.
EN: In English-speaking cultures, calling someone by their first name (like 'Emma') at the end of a question is a common way to get their attention directly and friendly, especially in casual settings.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a present or future situation. It is less certain than 'may' or 'must'.
It might rain later, so you should take an umbrella.
EN: The phrasal verb 'step out' means to leave a room or building for a short period of time, often used in casual or professional contexts.
Mr. Green just stepped out for a cup of coffee.
EN: In Western office and school culture, 'stepping out' is a very common, polite way to say someone has temporarily left their desk or room (e.g., to use the restroom, grab a drink, or take a quick call) but will return shortly.
EN: The modal verb 'can't' (cannot) is used to express a strong negative deduction or certainty about a present situation, meaning 'it is impossible that...'.
That can't be the correct answer; it doesn't make sense.
EN: Possessive pronouns (such as 'mine', 'yours', 'his', 'hers', 'ours', 'theirs') are used to replace a possessive adjective + noun combination to avoid repetition. Here, 'mine' replaces 'my phone'.
Your car is fast, but mine is more comfortable.
EN: The modal verb 'must' is used here to express strong logical deduction or certainty based on evidence. It translates to '一定' (must be) in this context.
She has been working all day, so she must be tired.
EN: The coordinating conjunction 'so' is used to introduce a clause showing the result or consequence of the preceding statement.
It was raining, so we stayed indoors.
EN: The modal verb 'could' is used to express possibility or uncertainty in the present or future. It suggests that something is possible, but not certain, similar to 'might' or 'may'.
The keys could be in your coat pocket.
EN: The word 'outside' can function as an adverb or an adjective. In this sentence, it acts as an adjective modifying the noun 'wind', indicating the location of the wind relative to the speaker.
The noise outside woke me up.
EN: The modal verb 'must' is used here to express a strong logical deduction or certainty based on evidence. When combined with the base verb 'be' ('must be'), it indicates that the speaker is almost sure about a present state.
He must be hungry after working all day.
EN: The preposition 'after' is used to indicate that one event or state follows another in time. In this sentence, it connects the state of being tired to the preceding long trip.
We went for a walk after dinner.
EN: The modal verb 'might' is used to express weak possibility (something that is possible but not certain). To make it negative, we add 'not' directly after 'might' ('might not'). Unlike verbs like 'do' or 'can', modal verbs do not change form for different subjects.
She might not come to the party tonight.
EN: The adverb 'yet' is commonly used in negative sentences to indicate that something has not happened up to the present time, though it is expected to happen in the future. It is usually placed at the end of the sentence.
They have not finished their homework yet.
EN: The modal verb 'can't' (cannot) is used to express negative deduction or strong disbelief. When we are almost 100% sure that something is impossible based on evidence, we use 'can't be' followed by an adjective or noun.
It can't be Ryan's jacket; his is much larger.
EN: The linking verb 'sound' is used to express an impression based on what has been heard or said. It is followed directly by an adjective (e.g., 'sounds impossible') to describe the subject.
That sounds great! Let's do it.
EN: The modal verb 'must' is used here to express strong deduction or logical necessity, meaning 'it is highly likely or certain that something is the case' based on available evidence.
He must be tired after the long trip.
EN: The passive voice 'be hidden' (be + past participle) is used to focus on the receiver of the action (the answer) rather than the agent who hid it.
The key must be hidden under the doormat.
EN: The structure 'Let's + base verb' (short for 'let us') is used to make suggestions or proposals, inviting others to do an action together.
Let's start the meeting now.
EN: The word 'before' acts as a conjunction here, introducing an adverbial clause of time ('before we guess') to indicate that the action in the main clause should happen first.
Wash your hands before you eat.
Key vocabulary words with IPA pronunciation, definitions, example sentences, and interactive quizzes.
Phrases with type tags, bilingual definitions, usage notes, and example sentences.
To be the property of someone.
To search for someone or something.
To leave a room or building for a short time.