例句：
The car must have been doing at least 100 miles an hour.
這車速肯定每小時至少100英里。
I have been doing some historical research.
我一直在進(jìn)行史學(xué)研究。">

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havebeendoing是什么時態(tài)用法

回答
瑞文問答

2021-08-19

have been doing是現(xiàn)在完成進(jìn)行時。
例句：
The car must have been doing at least 100 miles an hour.
這車速肯定每小時至少100英里。
I have been doing some historical research.
我一直在進(jìn)行史學(xué)研究。

擴展資料

　　We have been doing it for years.

　　我們多年來一直在做這個。

　　Many have been doing so.

　　許多新興市場國家也就是這么做的。

　　We can do what we have been doing.

　　我們也可以一如既往，舊調(diào)重彈。