i have been doing是什么时态

回答

爱扬教育

2022-06-28

have been doing是现在完成进行时，表示从过去一直持续到现在，并且现在并未停止，还将持续到将来。have done 现在完成时，到现在为止已经完成。

扩展资料

　　I have been doing it for two days.

　　这件工作我已做了两天了。

　　I have been doing this course for a year.

　　我学了这个课程已经有一年了。

　　I have been doing some historical research.

　　我一直在进行史学研究。