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he will have to stay in hospital. that's what he must do .这是正确的句子,我想问,如果是
that's what he must be doing ,就怎么错了
人气:187 ℃ 时间:2019-08-20 21:41:56
解答
因为前面描述的行为,也就是stay in hospital还没有发生,所以不可以是正在进行时态.
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