有没有must not have done的说法呀~~

来源:百度知道 编辑:UC知道 时间:2024/05/24 08:17:05
如果有的话,请给我个例句~~
另外, 在we must have done 的反意疑问句中什么时候用didn`t we?什么时候用haven`t we 呀~~~谢谢了,注意是两个问题哟~~~

没有must not have done, 表示对过去事情肯定的推测用must have done,否定的推测只能用can't/couldn't have done.
在反意疑问句中要根据具体的时态来定,如果句中有具体的过去时间状语的话就用did/didn't we,反之没有具体的过去时间状语,强调对现在影响时,就用完成时。
例如:He must have attended the party last night, didn't he?
He knows everything about it, so he must have read the book, hasn't he?