not

音标发音

• 英式音标 [nɒt]
• 美式音标 [nɑːt]
• 英式发音
• 美式发音

基本解释

• adv. 表示否定，不
• n. “非”（計算機中邏輯運算的一種）

词源解说

• 13世紀中期進入英語，直接源自古英語的noht，意爲無。

同根派生

• not相关词

用法辨析

adv. (副詞)

• not的基本意思是“不,沒有”,通常用於否定句中,位於動詞be、have/has或情態動詞之後,或與之一起搆成縮寫形式; 如:isn't, don't, won't等。
• 在美國口語中常用ain't代替am not/are not/is not/has not/have not。
• not後可接動詞的非限定形式:動詞不定式、動名詞或分詞。
• 在複郃句中常可將not置於主語的謂語動詞之前,而不放在從句中,這稱之爲轉移否定。
• not可用於省略結搆中,代替詞、詞組或整個句子。在一些動詞(如think, believe等)、副詞(如probably等)和詞組(如be afraid等)之後,可用not代替否定從句。
• not還可否定形容詞和副詞,用於表示委婉的語氣。
• not與all, both, every, always等詞連用時表示部分否定。
• 爲了加強語氣,可以把not搆成的否定的狀語等置於句首,竝引起主謂倒裝。

• not使用方法
• not详细辨析

英汉例句

用作副詞 (adv.)

• She did not see him.
  她沒看見他。

• not更多例句

词组短语

短語

• not null 非空;非空約束;不爲空;不能爲空
• Not see 不見;看不見;看不得;悠久不見
• Not really 算不上;也不是;不完全是;不盡然
• Not worth 不值;不值得;不足;不必
• Not optimistic 不容樂觀

• not更多词组

英英字典

劍橋英英字典

• used to form a negative phrase after verbs like "be", "can", "have", "will", "must", etc., usually used in the short form "n't" in speech

柯林斯英英字典

• You use not with verbs to form negative statements.
• You use not to form questions to which you expect the answer "yes."
• You use not, usually in the form n't, in questions which imply that someone should have done something, or to express surprise that something is not the case.
• You use not, usually in the form n't, in question tags after a positive statement.
• You use not, usually in the form n't, in polite suggestions.
• You use not to represent the negative of a word, group, or clause that has just been used.
• You can use not in front of "all" or "every" when you want to say something that applies only to some members of the group that you are talking about. (every)
• If something is not always the case, you mean that sometimes it is the case and sometimes it is not.
• You can use not or not even in front of "a" or "one" to emphasize that there is none at all of what is being mentioned.
• You can use not in front of a word referring to a distance, length of time, or other amount to say that the actual distance, time, or amount is less than the one mentioned.
• You use not when you are contrasting something that is true with something that is untrue. You use this especially to indicate that people might think that the untrue statement is true.
• You use not in expressions such as "not only," "not just," and "not simply" to emphasize that something is true, but it is not the whole truth. (not only##not)(not just##not)(not simply##not)
• You use not that to introduce a negative clause that contradicts something that the previous statement implies.
• Not at all is an emphatic way of saying "No" or of agreeing that the answer to a question is "No."
• Not at all is a polite way of acknowledging a person's thanks.
• not half&rarrsee half
• if not&rarrsee if
• more often than not&rarrsee often

• not剑桥字典
• not柯林斯字典

专业释义

計算機科學技術

• “非”
• 邏輯非
• 非
• 反
• 反電路

電子、通信與自動控制技術

• 非門
• 告知信息