現(xiàn)在完成時和現(xiàn)在完成進(jìn)行時的比較 現(xiàn)在完成時和現(xiàn)在完成進(jìn)行時的比較

3) 有少數(shù)動詞用兩種時態(tài)都可以，意思差別不大，如：
They have been working very well this term. 這學(xué)期他們學(xué)習(xí)很好。
They have worked very well this term.

It has been raining for two hours. 下了兩個小時的雨。
It has rained for two hours.

I have been hearing from her regularly. 我定期收到她的來信。
I have heard from her regularly.

We have looked for mushrooms but have not found any. 我們找尋蘑菇但一無所獲。