doing been done是什么時態(tài)
回答
愛揚教育
2022-03-20
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be+doing: 就是am/is /are+doing 表現(xiàn)在進行時，was/were+doing過去進行時；
have been doing 現(xiàn)在完成進行時,had been doing 過去完成進行時；
be+done 表被動；
have/had+done 表時態(tài),完成時等等。
擴展資料
例句：
I soon found that the work I was doing had been done by other people& in other words, I'm wasting my time.
我很快發(fā)現(xiàn)我在重復別人已做過的事情，換句話說，我是在浪費時間。
What we are doing has never been done before.
我們現(xiàn)在做的以前從未做過。
And they don't need to spend time doing what has already been done.
而不必要浪費時間去重復別人已經(jīng)做過的工作。