have been doing 和have done 还有had done三者的区别,用法

have been doing 和have done 还有had done三者的区别,用法
举几个例子,

HSxli 1年前已收到2个回答举报

共回答了21个问题采纳率：90.5% 举报

have been doing 是现在完成进行时,表过去发生的动作一直在进行到现在.
We have reading an interesting book since last week.
have done 是现在完成时,表在过去发生的动作对现有影响.
So far I have been to Beijing twice.
had done 是过去完成时,表过去的过去.
When I got there he had gone.
我是从事英语的,不明再问啦.

1年前

uyshihu 幼苗

共回答了27个问题举报

现在完成进行时/现在完成时/过去完成时
I have been studying.我一直在学习。（从过去一直持续到现在的动作）
I have finished my homewoke.我已经做完了作业。（现在已经完成的动作）
I had closed the window yesterday.我昨天已经关了窗户。（过去已经完成）
明白了吗？？...

1年前

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