need

need — 動詞

1. to require something because it is essential for a particular purpose or for sur

1.動詞及物A1
釋義

需要;需求

因特定目的或生存而必須擁有

to require something because it is essential for a particular purpose or for survival — for example, needing food to live, needing money to pay rent, or needing a tool to fix something.

例句

Tanvi needs a new pair of shoes for the school trip next week.

Tanvi 下週學校旅行需要一雙新鞋。

need + noun phrase (concrete object needed)

Plants need water and sunlight to grow properly.

植物需要水和陽光才能健康生長。

同義詞
  • require

    more formal than 'need'; common in official or professional contexts

  • depend on

    highlights that without the thing, the situation fails

  • call for

    used when a situation or problem makes something necessary

文法句型

need + noun phrase

常見錯誤

I need a car to go to work, but I cannot drive.
I need a car to get to work, but I do not have one yet.
💡'need' describes a requirement; the sentence should not contradict itself by mixing 'need' with inability.

2. to believe that something is necessary to bring improvement or benefit to a pers

2.動詞及物B1
釋義

需要改善

某事物有待改進或修繕

to believe that something is necessary to bring improvement or benefit to a person or situation — for instance, saying a car needs washing or a child needs more sleep.

例句

Your bicycle needs new tyres before you ride it on the mountain trail.

你的自行車在上山路之前需要換新輪胎。

need + noun phrase (improvement/repair)

I think this soup needs a little more salt to taste just right.

我覺得這碗湯需要再多加一點鹽才會剛好。

同義詞

文法句型

need + noun phrase (improvement)

need + gerund

need + to be + past participle

用法筆記

This sense commonly uses a gerund ('needs washing') or a passive infinitive ('needs to be washed') after the object to describe what action would improve the subject. The gerund form is more informal and typical in everyday speech.

常見錯誤

The car needs being fixed.
The car needs fixing.' or 'The car needs to be fixed.
💡'need' takes a gerund or passive infinitive, not 'being' + past participle.

3. used to say that someone is required or forced to do something because of rules,

3.動詞及物 / 不及物A1
釋義

必須

因規則或情況而必須做某事

used to say that someone is required or forced to do something because of rules, circumstances, or strong necessity — the same as 'have to' or 'must'.

例句

You need to show your passport when you arrive at the airport counter.

你抵達機場櫃檯時必須出示護照。

need to + infinitive (rule/requirement)

Christopher needs to finish his homework before he can play outside.

Christopher 必須先完成作業才能出去玩。

同義詞
  • have to

    equally common; very similar in meaning and usage

  • must

    stronger and more formal; does not change form for he/she/it

文法句型

need to + infinitive

need not + infinitive (formal)

用法筆記

This sense is followed by a to-infinitive ('need to do'). For the negative, 'don't need to' is the most common form in everyday English; 'needn't' is more common in British English and slightly formal.

常見錯誤

I need go to the store.
I need to go to the store.
💡'need' in this sense always requires 'to' before the following verb.

4. used to indicate that no requirement exists for a particular action to be taken

4.動詞不及物B1
釋義

不必

不需要或沒有理由做某事

used to indicate that no requirement exists for a particular action to be taken or performed.

例句

You needn't bring anything to the dinner — we have everything prepared already.

你晚餐不必帶任何東西來——我們已經準備好一切了。

needn't + infinitive (British English)

Amani doesn't need to worry about the exam because she studied every chapter.

Amani 不必擔心考試,因為她每個章節都讀過了。

同義詞
反義詞
  • must

    opposite in meaning — indicates necessity

  • have to

    opposite in meaning — indicates obligation

文法句型

need not + infinitive

do/does/did not need to + infinitive

用法筆記

The form 'needn't' (without 'to') is primarily British English and slightly formal. In American English and everyday conversation, 'don't/doesn't need to' is far more common. The present tense forms differ in meaning from the past tense forms (see senses 6 and 7).

常見錯誤

You needn't to wait for me.
You needn't wait for me.
💡When 'need' is used as a modal auxiliary (needn't), it is NOT followed by 'to'. When used as a normal verb ('don't need to'), it IS followed by 'to'.

5. used to express strong annoyance while telling a person that their intended acti

5.動詞不及物B2
釋義

無權;不該

怒斥對方不該做某事

used to express strong annoyance while telling a person that their intended action is not permitted or justified.

例句

You needn't think you can borrow my car whenever you feel like it.

你別以為可以隨便想借我的車就借。

needn't + infinitive (angry/disapproving)

Apinya needn't imagine that I will pay for her holiday after what she said.

Apinya 別以為我會替她付度假的費用——在她說了那些話之後。

同義詞
  • shouldn't even

    conveys similar disapproval but less strong than 'needn't' in this sense

文法句型

need not + infinitive (expressing disapproval)

用法筆記

Only used in negative form with 'needn't' + bare infinitive. The subject is usually 'you' directed at the person being criticised, but 'he/she' is also possible. This sense carries strong emotional tone and is primarily British.

6. used to indicate that a past action was uncalled for — whether a person performe

6.動詞不及物B2
釋義

本不必;無需

過去某件事其實不必要

used to indicate that a past action was uncalled for — whether a person performed it anyway or decided against it precisely because it was not needed.

例句

You needn't have washed the dishes — I already put them in the dishwasher.

你本不必洗碗的——我已經把碗放進洗碗機了。

needn't have + past participle (action done unnecessarily)

We didn't need to hurry because the flight was delayed by almost four hours.

我們不需要趕時間,因為班機延誤了將近四個小時。

文法句型

need not have + past participle

did not need to + infinitive

用法筆記

Distinguish between 'didn't need to do' (we do not know whether the action happened or not — either way it was unnecessary) and 'needn't have done' (the action WAS done, and it was unnecessary). Sense 7 specifically covers the 'needn't have done' meaning when emphasising that the action happened despite being unnecessary.

常見錯誤

I didn't need to go to the meeting, but I went anyway.' can cause confusion about whether I went.
I needn't have gone to the meeting
💡it was a waste of time.' makes clear I did go and it was unnecessary.

7. used to talk about a past action that was performed but later turned out to have

7.動詞不及物B2
釋義

其實不必

做了某事但後來發現沒必要

used to talk about a past action that was performed but later turned out to have been pointless — often carrying a tone of regret about wasted effort or relief that the effort was unnecessary.

例句

I needn't have worried about the speech — it went really well in the end.

我其實不必擔心那場演講——結果講得很順利。

needn't have + past participle (regret/relief about unnecessary action)

Vinícius needn't have cooked so much food because only three guests came to dinner.

Vinícius 其實不必煮那麼多菜,因為只有三位客人來吃晚餐。

文法句型

need not have + past participle (action happened)

用法筆記

This sense differs from sense 6 by focusing specifically on cases where the person DID do the action and later discovered it was unnecessary. The tone can express either mild regret ('I wasted effort') or relief ('luckily I didn't actually need it'). Only used in the form 'needn't have + past participle'.

need — 名詞