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英语
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He has been there for six months 和 My brother has never been abroad before.
这2个句中为什么要加BEEN?FOR起什么作用呢》?
人气：295 ℃ 时间：2019-10-17 03:12:02
解答
been在这是be动词的分词形式,这是一完成时的句子,需有have+动词分词形式．for后加一时间段表示状况一直持续
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