Be busy doing表示忙于做,也可以写成be busy with ,后接名词。例如:
The students are busy cleaning the classroom.
学生正忙于打扫教室。
Are you busy with the homework?
你在忙作业吗?
★ Have you heard from him?
Have you heard from him?你收到过他的信吗?
hear from 表示收到的信,相当于have a letter from him .例如:
I heard from him last week.
我上周收到他一封信。
I havent heard from him since he left.
只从他走后,我没收到他的信。
I had a letter from my sister.
我收到我妹妹的一封信。
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