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职称英语
It (rain) ______ last night for the ground is wet.must have rained根据句意可知,本题是对过去事
It (rain) ______ last night for the ground is wet.must have rained根据句意可知,本题是对过去事
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2023-10-08
106
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问题
It (rain) ______ last night for the ground is wet.
选项
答案
must have rained
解析
根据句意可知,本题是对过去事实的肯定推测,而情态动词must用于表示推测时,“must do”表示对现在事实的推测;“must have done”表示对过去事实的推测。对过去事实表示否定的推测要用“can’t/couldn’t have done”。
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