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英语
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I think it hard to fall asleep in night.请问it后为什么不加is.
人气:204 ℃ 时间:2020-04-05 19:28:02
解答
可加,可不加.加是一个宾语从句的结构,it做从句的形式主语.不加是一个复合宾语的结构,it做形式宾语,不定式做真正的宾语.
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