含情态动词must的反义疑问句

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含情态动词must 的反义疑问句

陈述部分有must,且表示”必须”时,附加疑问句部分用must n't,如果表示"必要"则用needn't。

陈述部分中是mustn't 表示"禁止"时,附加疑问句部分用must。

陈述部分中的must 表示"一定"、"想必"等推测意义时,附加疑问句部分而是根据陈述部分的谓语动词或其助动词来定。

They must clean the floor, mustn't they/needn't they?

他们必须擦地板,是不是?

We must stay at home, mustn't we?

我们必须留在家里,是不是?

We mustn't be late, must/may we?

我们不许迟到,是不是?

They must work hard, must n't they ?(必须)

They must take medical less ons, n eed n't they?必要)

He must be lying to me, ___?

A. mustn't be

B. must be

C. isn't be

D. is be

"他肯定在对我说谎。"must be doing 是对正在进行的事情的推断。还有must have done 是对

过去情况的肯定推断。must这种用法的反意疑问句不用must提问。

推断用法:

He must be lying to me.

xx 用法:

He is lying to me.

xx 用法反意疑问句:

He is lying to me, isn't he? 推断用法反意疑问句:

He must be lying to me, isn't he? 推断用法:

He must have been abroad.

xx 用法:

He has been abroad.

xx 用法反意疑问句:

He has been abroad, hasn't he? 推断用法反意疑问句:

He must have been abroad, hasn't he? 推断用法:

He must have gone swimming yesterday.

xx 用法:

He went swimming yesterday.

xx 用法反意疑问句:

He went swimming yesterday, didn't he? 推断用法反意疑问句:

He must have gone swimming yesterday, didn't he?He must be a visitor, isn't he?(对现在情况的推测)

You must have see n him at his birthday party yesterday, did n't you?对过去情况的推测,且句中有过去的时间状语)

You must have seen him at his birthday party,haven't you?强调动作的完成)1 带have to时,附加疑问用do或have的相应形式,用do更常见。

You don ' t have to go to school on Sundays , do you ?

We have to work today , don 't we ? (haven ' t we ?)

2 带must 时

A表示必须”附加疑问部分用mustn 't

We must work hard , mustn ' t we ?

B表示有必要”时,附加疑问部分用needn ' t.

The teacher must show concern for each pupil , needn ' t he ?

C表示推测”时,附加疑问部分要与陈述部分的谓语动词相呼应。

He must be a teacher, isn ' t he ?

Dmust + have + do ne是对过去情况的推测,当陈述部分没有明确的表示过去的时间状语时,附加疑问要用have的相应形式;当陈述部分有明确的过去时间状语时,附加疑问要用过去时。You must have lived here for a long time , haven ' t you ?

You must have seen him yesterday , didn ' t you ?

E 当陈述部分是must not ,表示“一定不要”、“禁止”时,附加疑问除用must 外,还可以用may.

I must not tell him , must I ? ( may I ?)

3带used to时,附加疑问用usedn '或didn '但口语中倾向于后者。

Thereused to be an apple tree in the garden , didn 't there ? (usedn 带need 时,附加疑问用do 或need ,应该与陈述部分need 用法相呼应。

I needn 't tell you the answer , need I ?

You need to buy a better dictionary , don 't you ?

5 带ought to 时,附加疑问用ought. ,但在美国英语中用should

We ought to help each other , oughtn 't we ? / shouldn 't we ?

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