作业帮They must have been to the USA,have not they?与He must have b
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They must have been to the USA,have not they?与He must have been to the USA,was not he?区别
最好讲讲为什么句子主语一换,must反义疑问句就不一样了?
最好讲讲为什么句子主语一换,must反义疑问句就不一样了?
你好,你没有搞懂这些句子的用法:
在这两个句子中,因为都没有时间状语的修饰,所以句子发生的时间不确定,答案也不确定,请你看以下的句子,
They must have been to the USA,haven't they?
He must have been to the USA,hasn't he?
这两个句子都是对的,因为都没有时间状语,可以翻译为:
他(们)到过美国,是吗?
但是加一个状语则变为以下的两个句子:
They must have been to the USA last year,weren't they?
He must have been to the USA last year,wasn't he?
因为,这两个句子都表示去年去了美国这个具体的时间发生的事,所以要用一般过去时态.
又如下面的这个句子:
It must have rained last night,didn't it ?
It must have rained ,hasn't it?
在这两个句子中,因为都没有时间状语的修饰,所以句子发生的时间不确定,答案也不确定,请你看以下的句子,
They must have been to the USA,haven't they?
He must have been to the USA,hasn't he?
这两个句子都是对的,因为都没有时间状语,可以翻译为:
他(们)到过美国,是吗?
但是加一个状语则变为以下的两个句子:
They must have been to the USA last year,weren't they?
He must have been to the USA last year,wasn't he?
因为,这两个句子都表示去年去了美国这个具体的时间发生的事,所以要用一般过去时态.
又如下面的这个句子:
It must have rained last night,didn't it ?
It must have rained ,hasn't it?
They must have been to the USA,have not they?与He must have b
They must have been here the day before yesterday,----------
They must have been enjoying themselves there,or they _____
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He must have been sent to the hospital 改反意疑问句
It must have been they who picked the flowers.这里的强调句的must ha
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Do they -------return all the books?A.has to B.must C.have t
must 与have to
(They must have been there yesterday ,______they?)能用"weren't