反义疑问句

Question

She must be a music lover,______,______?

Answer 1

isn't she?

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

例子:

He must have come yesterday.
变换句式作
I am sure that he came yesterday.

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?

Answer 2

Answer 3

isn't she