1.It must have rained last night,_____?
真实句It rained last night.再附加问句didn't it?所以答案为didn't it?
2.She must have seen the film before,_____?
真实句She has seen the film before.再附加问句hasn't she?所以答案为hasn't she.
must have done 表推测时,附加疑问句该怎么样用?
1.It must have rained last night,___?真实句It rained last night.再附加问句didn't it?所以答案为didn't it?2.She must have seen the film before,___?真实句She has seen the film before.再附加问句hasn't she?所以答案为hasn't she.
反意疑问句陈述部分must表示″一定,肯定″推测意义,如何判断附加问句的...
陈述部分是must have done且有过去时间，后面用didn,t+主语。如果没过去时间用have\/has+主语 如must be,,,后面用isn,t\/aren,t+主语
must 的反意疑问句 是什么呢 needn't???
当谓语动词是 must+have+done（过去分词形式）时，强调动作完成情况，反意疑问句用 haven't\/hasn't+主语。例如：(1) She must have arrived there, haven't she? (2) You must have seen the film, haven't you?当谓语动词是 must+do（动词原形）时，反意疑问句形式较为复杂。一般而言，表...
He must have finished by the time tomorrow 反义疑问部分怎么问...
（4）当must+have done表示对过去的情况进行推测（一般句中有明确的过去时间状语），问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't\/weren't+主语”；如果强调动作的完成（一般没有明确的过去时间状语），问句要用“haven't\/hasn't+主语”。She must have read the novel last week,did...
must have done什么意思
情态动词+动词完成时,即情态动词+have+done.表示对过去的行为或动作进行推测,评论或者判断.1.must have done.表示对过去某事的肯定猜测，其否定或疑问形式都用can\/could来表示。例如：since the road is wet,it must have rained last night.2；当然对现在发生或者将来发生的事情，要用must do表示猜测...
He must have done his homework last night,didn't he? 这里为什么用d...
因为句中有一个明显的时间短语last night, 在这种情况下，反义疑问句就用过去时。如果没有last night, 就用现在完成时。
must have done是什么意思
must+have done过去一定做了某事（对过去的事情一种肯定的猜测、推测）。如：He said I must have done something bad to deserve it.他说我肯定是罪有应得。That car must have cost a packet.那辆汽车一定花了一大笔钱。I think we must have taken a wrong turning somewhere.我觉得我们一定...
must be的反义疑问句什么时候用must't?当句子中出现什么的时候,反意疑...
4、当must+have done表示对过去的情况进行推测（一般句中有明确的过去时间状语），问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't\/weren't+主语”。如果强调动作的完成（一般没有明确的过去时间状语），问句要用“haven't\/hasn't+主语”。例如：She must have read the novel last week...
有mustn't have done这个结构么?表示什么?
have done 表推测的用法，表示对过去某事的肯定猜测，译为过去肯定做了某事，其can \/could 来表示或疑问形式必须用can \/could 来表示 例如 Since the road is wet ,it must have rained last night 只有 He can't have missed the way ,i drew him a map 完全没有你说的那种用法，不存在mustn...
情态动词+have done
1. must+have+done 表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。eg. It must have rained last night, for the ground is wet. 昨晚一定下雨了，因为地面还是湿的。2. can+have+done 表示对过去行为的怀疑，用于疑问句，译成“可能做过……吗？”eg. There is no ...
