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.
2 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.
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