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you must have
must
have
done,must do,can't have done,can't do的区别
答:
must
have
done对过去发生的动作很有把握的肯定推测 must do“必须做”,含有一种命令的口吻,语气强 can't have done对过去发生的动作很有把握的否定推测,意为“不可能做了”can't do“不能做”表示不给予许可,语气没有must do强
must
have
done的反义疑问句
答:
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,否定为can’t do he must understand that we mean business.
you
must be hungry ...
He
must
have
learn English for three years,___? A.hasn't he B.h...
答:
1.
must
表示推测时,其后的反意疑问句要根据must后的谓语动词一致。你查到的几个句子有两个对,中间那个不对。
You
must
have
studied English for three years, haven't
you
? / didn't you?这个句子只能用haven't , 不可以用didn't.2.在前面的陈述句中有具体的过去的时间状语时才用didn't ...
have
to和
must
的区别是什么?
答:
3、使用场景不同 由
must
引起的疑问句,肯定回答要用must 或
have
to ,否定回答要用needn't或don't have to, 意思是“不必” ,must 的否定形式mustn't表示禁止,意思是“不准,不许”。如:(1)-
Must
I finish the task right now? 我现在必须完成这个工作吗?-Yes,
you
must / have to...
求详细解答:
You
must
__
答:
B
must
have
been改成设问 有时间状语和没有的 急啊啊啊啊啊
答:
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”。
You
must have been late for school ,wasn't
you
...
must
的用法有哪些?
答:
①表示“必需”“一定”“必要性”1.
must
表主观上的必需,而
have
to表职责或义务,强调客观。2.need作为情态动词用于疑问句或否定句。Need
you
……?的答句是Yes,I must.或No,I needn't(don't have to)对问句表示有必要做某事的肯定答语是Yes,you must/have to.否定答语是No,you needn't....
must
用法
视频时间 03:29
mustn't
have
done和can't have done的区别最好有例子
答:
请看常见的“情态动词 +
have
+ 过去分词”的用法:一、“
must
+ have + 过去分词”表示对过去发生的事情或状态进行推测,语气比较坚定,通常只用于肯定句.如:It must have rained last night,for the ground is wet.
You
must have been mad to speak to the servant.二、“can / could + ...
现在完成时的句子中有
must
时,变反意疑问句怎样变
答:
She
must
have
read the novel last week,didn't she?她上星期一定读了这本小说,是吗?
You
must have told her about it,haven't
you
?你一定把这事告诉她了,是吗?希望对你有所帮助!参考资料:http://baike.baidu.com/view/1656124.htm ...
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