2020北京高中士兵考军校-英语知识点汇总(三十七)
五、现在完成进行时present perfect continuous
用法:1.过去开始的反复或正在进行的尚未完成的动作
I’ve been going everywhere by bike for the last two months.
1. 最近的过去开始的对现在又影响的动作。
He ‘s been doing his science project all night.(that’s why he’s so sleepy, now.)
Form:形式
Subject + have /has +been + -ing
You’ve been studying very hard.
六、Present perfect and present perfect continuous
1.我们用现在完成时谈论一个完成的动作,用现在完成进行时谈论未完成的动作。
2.现在完成时关注动作结果,尤其谈到数字或数量时,现在完成进行时关注动作本身,特别是解释动作可见的结果时。
He has run three times
He has been running for an hour
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