It Must Be the Battery (H2)
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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.
The lights are off; they must be sleeping.
EN: The idiom 'be dead' is commonly used to describe a battery that has lost all its electrical charge and is no longer functioning.
My phone is dead, so I can't call you.
EN: The modal verb 'might' is used to express 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 adverb 'instead' is used to suggest an alternative to something that has just been mentioned. It often appears at the end of a sentence.
If you don't want coffee, we can have tea instead.
EN: The modal verb 'can't' is used to express negative deduction. It indicates that the speaker is almost 100% certain that something is impossible based on the evidence.
It can't be raining; the sky is completely clear.
EN: The pronoun 'one' is used as a substitute to avoid repeating a singular countable noun that has already been mentioned (in this case, 'the charger').
If you need a pen, I have a blue one you can borrow.
EN: The modal verb 'may' is used to express possibility or permission. In this context, it indicates a moderate level of possibility (about 50% chance) that something is true or will happen, which is less certain than 'must' but more certain than 'might'. It is followed by the base form of the verb ('need').
The store may close early today because of the storm.
EN: The noun 'need' can be used as a transitive verb meaning to require something. When followed by a noun phrase (like 'an update'), it indicates that the subject requires that specific thing to function properly or to resolve a situation.
My phone needs a new battery.
EN: In modern tech-savvy culture, blaming software issues on the lack of updates is a very common first step in troubleshooting. The word 'app' (short for application) is universally understood and used in both casual and professional contexts.
EN: The modal verb 'could' is used here to express a weak or tentative possibility in the present or future. It suggests that something is possible, but the speaker is not entirely certain.
It could rain later, so you should bring an umbrella.
EN: The word 'simple' is used as an adjective modifying the noun phrase 'loose cable'. In this context, 'simple' means uncomplicated, basic, or easy to resolve, rather than complex.
EN: The present continuous tense (be + verb-ing) is used to describe an action that is happening right now, at the moment of speaking.
The phone is ringing, can you answer it?
EN: The modal verb 'must' followed by 'be + verb-ing' (must be doing) is used to express a strong logical deduction or certainty about a present action.
He is not answering his phone; he must be sleeping.
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 bring an umbrella.
EN: A semicolon (;) is used to link two independent clauses that are closely related in thought. It indicates a closer relationship between the clauses than a period would.
The store was closed; we had to go somewhere else.
EN: The modal verb 'can't' (cannot) is used to express a strong negative deduction or certainty about a present situation based on evidence. It is the opposite of 'must'.
He can't be at home; I just saw him at the supermarket.
EN: The word 'ago' is a temporal adverb used after a measurement of time to indicate how far back in the past an event occurred. It is always used with the simple past tense.
The train left ten minutes ago.
EN: The modal verb 'could' is used here to express a present or future possibility. It suggests that something is possible, but not certain, and is softer and less definite than 'may' or 'might'.
The keys could be in the kitchen, but I'm not sure.
EN: The prepositional phrase 'in this room' acts as an adverbial of place, modifying the adjective 'weak' by specifying where the signal is weak.
It is very quiet in this room.
EN: The structure 'may have + past participle' is used to express a possibility about a past event. It suggests that something perhaps happened, but the speaker is not 100% certain.
She may have missed the bus this morning.
EN: The passive voice with modal verbs in the past is formed using 'modal + have been + past participle'. Here, 'may have been saved' indicates that the action of saving was performed on the subject (the data) by an unknown or unspecified agent in the past.
The window may have been broken by the wind.
EN: The modal verb 'must' is used here for making a strong logical deduction based on evidence. When combined with the continuous aspect 'be + -ing' (must be coming), it expresses a strong belief that an action is happening right now.
She must be sleeping because her bedroom light is off.
EN: The prepositional phrase 'from the speaker' indicates the source or origin of the sound. 'From' is used to show where something starts or originates.
EN: The modal verb 'should' is used to express a recommendation, advice, or a sensible course of action. It is followed by the base form of the verb (in this case, 'test').
We should double-check the results before submitting the report.
EN: The infinitive phrase 'to be sure' functions as an adverbial of purpose (an infinitive of purpose), explaining why the action of testing is being performed.
He locked the door to be sure no one would enter.
EN: In professional and technical contexts in Western culture, 'to be sure' or 'just to be safe' is a common, polite way to justify taking extra steps or double-checking work without implying that anyone made a mistake. It emphasizes thoroughness and a scientific approach to problem-solving.
EN: The Simple Past Tense is used to describe completed actions that happened at a specific time in the past. In this sentence, 'froze' is the irregular past tense form of the verb 'freeze', indicating the laptop stopped working at a specific moment yesterday.
She lost her keys on the way to work this morning.
EN: The prepositional phrase 'in the middle of' is used to describe being in the center of an area, or more commonly, in the process of doing an activity or during a period of time.
He fell asleep in the middle of the movie.
EN: The phrase 'At first' is a prepositional phrase used as an adverbial modifier to indicate the initial state or belief, often contrasting with what happened or was realized later.
At first, the language was difficult, but it got easier.
EN: The modal verb 'must' followed by 'be' is used to express a strong logical assumption or high certainty about a present state based on evidence.
You have been working all day; you must be tired.
EN: The coordinating conjunction 'so' is used to connect two independent clauses, showing a cause-and-effect relationship. The first clause ('The screen was dark') is the cause, and the second clause ('I guessed...') is the effect.
It was raining, so we decided to stay indoors.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a situation. In this sentence, 'might be empty' indicates that the speaker is guessing and is not entirely sure if the battery is dead.
She might join us for dinner later, but she has a lot of work.
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 means 'it is/was impossible that...'.
He couldn't be at home; I saw him at the office five minutes ago.
EN: 'Since' is used as a subordinating conjunction to introduce a reason, meaning 'because' or 'as'. It is often used when the reason is already known or obvious to the listener.
Since it is raining, we should stay indoors.
EN: The modal verb structure 'might have been' is used to express a past possibility. 'Might' indicates a possibility, and 'have been' (have + past participle) shifts the time frame to the past, suggesting that something was possibly true in the past.
He was absent yesterday; he might have been sick.
EN: The coordinating conjunction 'so' is used to connect two independent clauses, where the second clause represents the result or consequence of the first clause.
The store was closed, so we went home.
EN: The noun clause (or object clause) 'the cause could be too many open programs' acts as the direct object of the verb 'knew'. The conjunction 'that' is omitted here, which is very common in informal and spoken English.
I think (that) we should leave now.
EN: The modal verb 'could' is used here to express a possibility in the past, suggesting that something was possible but not certain.
She said the noise could be a cat on the roof.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a present or future situation. Adding 'also' indicates that this is another potential option among others.
It might also rain later, so you should bring an umbrella.
EN: The present participle phrase 'running quietly in the background' acts as an adjective clause (reduced relative clause) modifying the noun 'update'. It describes an ongoing action happening at the same time.
I can hear a dog barking loudly in the yard.
EN: The verb 'decide' is followed by a to-infinitive ('to' + base verb) to express an intention or a choice made after thinking. It cannot be followed by a gerund (-ing form).
She decided to buy a new laptop.
EN: The phrase 'one by one' is an adverbial idiom meaning individually, in succession, or one after another. It is used to describe doing something in a systematic, sequential order.
The students entered the classroom one by one.
EN: The modal verb 'must' is used here to express strong probability or logical deduction based on available evidence. It means 'it is highly likely or certain that something is true.'
The ground is wet; it must be raining outside.
EN: The reflexive pronoun 'myself' is used with the verb 'tell' ('tell myself') to indicate that the speaker is talking to or reassuring themselves internally.
I told myself that everything would be fine.
EN: The verb 'start' can be followed by a gerund (verb-ing) to indicate the beginning of an activity. 'Start working' means to begin the action of functioning or operating.
The washing machine started making a strange noise.
EN: The adverb 'again' is used at the end of a clause to show that an action or state is repeated, returning to a previous condition.
After I restarted the phone, the screen worked again.
EN: The modal structure 'must have been' is used to express a strong logical deduction or certainty about a past event or state, meaning 'it is highly likely that something was true'.
He must have been tired after the long flight.
EN: The adverbial phrase 'all along' means 'from the very beginning' or 'the whole time' during a past situation.
I knew the truth all along.
EN: The preposition 'like' is used to make a comparison, meaning 'similar to' or 'in the same manner as'. It is followed by a noun or pronoun.
Like a professional chef, she prepares every meal with great care.
EN: The verb 'learn' is followed by a to-infinitive ('to' + base verb) to express acquiring a skill or habit. In this sentence, the infinitive 'to' is shared across three parallel verbs: 'guess', 'test', and 'check'.
He learned to play the piano when he was young.
EN: The phrase 'guess, test, and check' mirrors the scientific method (hypothesize, experiment, analyze). In English-speaking academic cultures, encouraging students to think 'like a scientist' is a common pedagogical approach to foster critical thinking and systematic problem-solving, even in non-science contexts like troubleshooting technology.
EN: The contraction 'won't' (will not) is often used to describe a machine or object that refuses to work or function as expected, implying a stubborn refusal.
My car won't start this morning.
EN: The verb 'work' is commonly used in English to mean 'to function correctly' or 'to operate properly' when referring to machines, devices, or systems.
Is the Wi-Fi working now?
EN: In office and school environments, technology issues are a common topic of small talk and shared frustration. Addressing a colleague or classmate by their first name (like 'Emma') when asking for help creates a collaborative and friendly atmosphere.
EN: The modal verb 'might' is used to express a possibility or a guess about a present or future situation. It indicates a lower level of certainty than 'may' or 'must'. 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: The idiom 'be out of' means to have no more of something left (e.g., supplies, resources). It is followed by a noun representing the item that has run out.
We are out of milk, so I need to go to the store.
EN: The modal verb 'can't' is used to express negative deduction or strong disbelief about a present situation, meaning 'it is impossible that...'.
It can't be raining; the sky is completely clear.
EN: A semicolon (;) is used to link two independent clauses that are closely related in thought, without using a coordinating conjunction like 'because' or 'and'.
The store is closed; we will have to come back tomorrow.
EN: The modal verb 'could' is used here to express a weak or tentative possibility in the present or future. It suggests that something is possible, but the speaker is not entirely certain.
The key could be in your pocket.
EN: The prepositional phrase 'at the back' functions as an adverbial modifier of place, indicating the specific location of the subject or action (in this case, where the cable might be loose).
The power switch is at the back of the machine.
EN: The modal verb 'may' is used to express possibility or probability in the present or future. It suggests that something is possible, but not certain.
It may rain later, so you should bring an umbrella.
EN: The 'too + adjective + to-infinitive' structure is used to indicate that something is excessive, making a certain action or result impossible.
The coffee is too hot to drink.
EN: The use of 'must' for logical deduction. In English, 'must' is not only used for obligation (duty) but also to express a strong belief or logical conclusion based on evidence. When used this way, it translates to '一定...' (must be/must have been).
The lights are off; they must be sleeping.
EN: The passive voice with 'overloaded'. The past participle 'overloaded' functions here as an adjective describing the state of the subject 'it' (the computer/system), indicating that too much demand or data has been placed on it.
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, 'need').
It might rain later, so take an umbrella.
EN: The noun phrase 'a quick restart' consists of the indefinite article 'a', the adjective 'quick' modifying the noun, and the noun 'restart' which functions as the direct object of the verb 'need'.
The system needs a complete update.
EN: In IT and tech support culture, 'a quick restart' (or rebooting) is widely known as the first and most common troubleshooting step for almost any minor device issue, often referenced humorously in tech circles.
EN: The modal verb 'can't' is used to express a strong negative deduction or certainty that something is impossible based on present evidence.
He can't be at home; I saw him leave for work ten minutes ago.
EN: The prepositional phrase 'in this corner' acts as an adverbial modifier of place, specifying the exact location where the state (the signal being strong) is evaluated.
The Wi-Fi is usually better in this corner of the room.
EN: The modal verb 'must' is used here to express strong logical deduction or certainty based on evidence. Unlike 'must' for obligation (meaning 'have to'), this epistemic use means 'it is highly likely or certain that something is true'.
The lights are off, so they must be asleep.
EN: The comparative adjective 'simpler' (from the base adjective 'simple') is used with 'than' to compare two states. The clause 'than we think' uses the simple present tense to refer to our current belief or assumption.
The test was easier than we expected.
EN: In English-speaking professional and academic environments, expressing logical deductions with 'must be' or 'could be' is a common way to brainstorm solutions. It shows analytical thinking rather than jumping to emotional conclusions, reflecting a collaborative problem-solving culture.
EN: The structure 'Let's + base verb' (short for 'let us') is used to make a suggestion or propose an action that includes both the speaker and the listener.
Let's find a solution together.
EN: The conjunction 'before' introduces an adverbial clause of time. In this clause, the simple present tense ('we panic') is used to refer to a future possibility or general situation.
Please lock the door before you leave.
Key vocabulary words with IPA pronunciation, definitions, example sentences, and interactive quizzes.
Phrases with type tags, bilingual definitions, usage notes, and example sentences.
A wire or connection that is not securely fastened or plugged in.
To operate or execute a computer program quietly without user interaction or visibility.
Individually and in succession; one after another.
Having no paper left in a machine, such as a printer or copier.