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用must have done造否定句
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第1个回答 2014-09-15
He must have done homework.
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must
have
done
的用法
答:
一、
must
have
done
sth.一定做某事。表示对过去事情的较有把握的推测,这时只能用在肯定句中,“肯定/必须已经干过…”,在
否定句
和疑问句中用can't或couldn't或can/ could,例如:From what you said, she must have told you all about it.从你的话看,她一定告诉了你所有的事情。2.The l...
must
have
done
什么意思?
答:
"
must
have
done
" 是一个英语的情态动词结构,用于表示对过去发生的事情的推测或假设。它可以用来表达对某个事件或情况的肯定推断,即某事在过去肯定发生了。例如:"He must have arrived home already."(他肯定已经到家了。)"She must have forgotten her keys."(她肯定忘记了她的钥匙。)这个结构...
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