present perfect simple and present perfect continuous
人气:337 ℃ 时间:2019-10-20 23:06:37
解答
present perfect simple have/has +动词过去分词 表示已经完成 某事I have done my homework.(我已经做完功课.)present perfect simple have/has + been + 动词现在分词 表示某事或动作已经开始,还在进行中I have b...
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