must 的三种反义疑问句

must

的三种反义疑问句

既然多数人感到麻烦我就来讲一讲

must

反义疑问句 的用法。

你记住，

must

反义疑问句就三种可能：

①must

②needn't

③变换句式

下面来讲一讲他们分别的用法，一般考试就这三种可能！

1

、mustn't→must

mustn't

在陈述句中的意思一般是不允许，禁止，所以他 的反义疑问句用

must

或

may

例：

You mustn't smoke here, must you?

或

may you?

2

、必须→needn't

当

must

在陈述句中作“必须”解时 ，它的反义疑问句就变成

needn't

例：

You must go now ,needn't you?

3

、变换句式

在

must

表示推测，做“一定，准是 ”，简单的说就是

must

用于虚拟语气时

像数学一样我们引入一个“常量”——

I am sure that

下面就能你那句话作为例子，我们变换一下。

He must have come yesterday.

变换句式作

I am sure that he came yesterday.

好我们应该分清，反义疑问句问的应该是

I am sure that

后面的从句

所以，按照一般反义疑问句的规则得出结果

I am sure that he came yesterday, didn't he?

最后再把句子还原

He must have come yesterday

，

didn't he?

此题解答完毕。

下面是我搜索英国和美国语料库的结果：

英国语料库：

Davies,

Mark.

(2004-)

BYU-BNC:

The

British

National

Corpus.

Available

online

at

/bnc.

1. I was just thinking I bet that Helen was pleased then cos she must have passed, mustn't she?

2. Yes. Now it must have been mustn't it, a possibility, if been there at all, that he was hiding under that bed?

3. Exactly why, he must have had some sympathy, mustn't he?.

4. ?she must have passed mustn't she?

5. He must have been interested in cooking, mustn't he?

6. Yeah well I mean he must have gone in the hospital to her mustn't he?

8. You must have touched her up the wrong way. --Yeah, I must have done mustn't I?