当妈妈把饭煮好，我正忙于功课。

When mum finished cooking, I was busy with my study.

youdao

去年冬天我忙于功课，每天回家都很晚。

Last winter I was very busy with my lessons and came home very late every day.

youdao

约翰在忙于他的功课。

John is busy with his lesson.

youdao

我总是忙于自己的功课。我每天除了学习还是学习。

I'm always busy with my lessons. What I have to do everyday is nothing but study.

youdao

那时，他正忙于准备功课。

At the moment he was busy preparing his lessons.

youdao

珍正忙于她的功课。

A. Jane was too busy doing her homework.

youdao

汤姆总是忙于他的功课。

Tom is always busy with his lessons.

youdao

此刻，我正忙于(各科功课的)学习。

At this moment I am very busy with my studies.

youdao

前段时间因为公主忙于复习和考试，上周又忙于新功课，忙于“理事会”，忙于朋友间…公主已经堆了很多衣服需要洗！

Because some days ago I was busy with the review and the test, last week was busy with the new schoolwork, was busy with "the council", was busy with between my friends.

youdao

前段时间因为公主忙于复习和考试，上周又忙于新功课，忙于“理事会”，忙于朋友间…公主已经堆了很多衣服需要洗！

Because some days ago I was busy with the review and the test, last week was busy with the new schoolwork, was busy with "the council", was busy with between my friends.

youdao