not
音標(biāo)發(fā)音
- 英式音標(biāo) [n?t]
- 美式音標(biāo) [nɑ?t]
- 英式發(fā)音
- 美式發(fā)音
基本解釋
- adv. 表示否定，不
- n. “非”（計(jì)算機(jī)中邏輯運(yùn)算的一種）
詞源解說
- 13世紀(jì)中期進(jìn)入英語，直接源自古英語的noht，意為無。
用法辨析
- not的基本意思是“不,沒有”,通常用于否定句中,位于動(dòng)詞be、have/has或情態(tài)動(dòng)詞之后,或與之一起構(gòu)成縮寫形式; 如:isn't, don't, won't等。
- 在美國(guó)口語中常用ain't代替am not/are not/is not/has not/have not。
- not后可接動(dòng)詞的非限定形式:動(dòng)詞不定式、動(dòng)名詞或分詞。
- 在復(fù)合句中?？蓪?em>not置于主語的謂語動(dòng)詞之前,而不放在從句中,這稱之為轉(zhuǎn)移否定。
- not可用于省略結(jié)構(gòu)中,代替詞、詞組或整個(gè)句子。在一些動(dòng)詞(如think, believe等)、副詞(如probably等)和詞組(如be afraid等)之后,可用not代替否定從句。
- not還可否定形容詞和副詞,用于表示委婉的語氣。
- not與all, both, every, always等詞連用時(shí)表示部分否定。
- 為了加強(qiáng)語氣,可以把not構(gòu)成的否定的狀語等置于句首,并引起主謂倒裝。
adv. (副詞)
詞組短語
- not null 非空;非空約束;不為空;不能為空
- 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
短語
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
- 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
劍橋英英字典
柯林斯英英字典
專業(yè)釋義
- “非”
- 邏輯非
- 非
- 反
- 反電路
- 非門
- 告知信息