2017中考英语语法复习：现在完成进行时
2016-10-20 09:51:07中考网编辑
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8.现在完成进行时
概念: 表示从过去某一时间开始持续到现在的动作.这一动作可能是刚刚开始,也可能仍在继续,并可能延续到将来.
构成: 主语 + 助动词 (have / has ) + been + 动词-ing +…
如: 1. I have been sitting here for an hour.
2. She has been collecting stamps for about 6 years.
