have/has+过去分词与jave/has been+过去分词有什么区别
人气：415 ℃ 时间：2019-08-17 01:33:37
解答
前面一个是现在完成时的时态构成,eg.I have learnt English for three years.
后面一个是现在完成时的被动结构 eg.English has been learnt by a lot of people.
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