陈述句的否定句式

  1. 若句中有连系动词be、情态动词或助动词,则分别在它们的后面加上not。

His mother has already called the police for help. 他的母亲已经报警求助了。

→His mother hasn’t called the police for help yet. 他的母亲还没有报警求助。

【典例】

Sometimes you’re supposed to come early. (变为否定句)

Sometimes you ____________ ____________ supposed to come early.

【答案】are not

【解析】因为句中有连系动词are,所以在变为否定句时,应在are后加not。

  1. 原句中没有连系动词be、助动词或情态动词时,要在行为动词前加助动词(do,does,did)与否定副词not。并且要注意这时的行为动词要用原形。另外,还需要将原句中的some改为any,too改为either,already改为yet。

The old man hurt his leg last Wednesday. 这位老人上周三腿受伤了。

→The old man didn’t hurt his leg last Wednesday. 这位老人上周三腿没有受伤。

【典例】

He did some work this morning. (变为否定句)

He ____________ do ____________ work this morning.

【答案】didn’t;any

【解析】句子的谓语动词为did,变否定句时加助动词did与not,注意这时的行为动词要用原形,且句中的some要变为any。

  1. 英语中有些肯定句与not连用只表示部分否定,所以在变为否定句时,只需将其中的某一(些)词语变为否定词即可。常见的这类词有both→neither,all→none,both… and… →neither… nor…,everyone/each→no one/nobody,each/either→neither,a few→few,a little→little。

All the students are listening carefully.

→None of the students is/are listening carefully.

Both Joy and Sam like singing Beijing Opera.

→Neither Joy nor Sam likes singing Beijing Opera.

【典例】

I know ____________ about the news. You can ask Peter. He can tell you the news.

  1. everything B. nothing C. anything

【答案】B

【解析】从句子You can ask Peter. He can tell you the news.可判断出,"我"对这个消息一无所知,所以用否定词nothing。

  1. 在含有宾语从句的主从复合句中,当主句的主语是第一人称,谓语动词是think时,如果要否定后面的宾语从句,习惯上否定主句的谓语动词。

I think she will come here soon.

→I don’t think she will come here soon.

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