Question

关于反义疑问句

eg1 he must have read the book,___ ___?
这里相应发反义疑问句是mustn't he？还是didn't 或haven't？怎么分别？

eg2 she thinks she can do it herself,___ ___?
这里相应的反义疑问句是以主句还是从句作标准？

还有的就是要改反义疑问句的如果有情态动词need 那些，要不要先分清他们是实义动词还是情态动词？他们在两种时候又分别是怎么改的，请给出相应例子。

最后还有一点是，nothing和something作主语时，反义疑问句是不是可以用it和they替代都可以？

谢谢。我不需要复制网上的反义疑问句解释，只要着重讲讲我问的这些问题，我会相应加分的。

Answer 1

eg1 he must have read the book,___ ___?
这里相应发反义疑问句是mustn't he？还是didn't 或haven't？怎么分别？
答：
a.当must表示“命令或强制”时，反意疑问部分用mustn't。例如：
You must do it by yourself,mustn't you?
b.当must表示“有必要”时，反意疑问句用needn't，例如：
You must see him tonight,meedn't you?

eg2 she thinks she can do it herself,___ ___?
这里相应的反义疑问句是以主句还是从句作标准？
答：can't she
当陈述部分是sb. think 加从句时，疑问句应和从句的人称时态保持一致。
I think chickens can swim, can’t they?
I think Lucy is a good girl, isn’t she?
I didn't think he was happy, was he?

改反义疑问句的如果有情态动词need 那些，要不要先分清他们是实义动词还是情态动词？他们在两种时候又分别是怎么改的，请给出相应例子。
答：当陈述部分带有need时，反意疑问部分需视need的含义而定。如果need用作情态动词，则反意疑问部分用need形式；如果need用作实义动词，表示“需要”，则反意疑问部分用do形式。例如：
You needn't go there,need you?
She needs to fo there,doesn't she?
Plants need sun to grow,don't they?

nothing和something作主语时，反义疑问句是不是可以用it和they替代都可以？
答：可以！

Answer 2