be busy后加什么介词

be busy with sth 忙于某事。

例句

They are busy with word puzzles.

她们忙着做拼字游戏。

I was busy with my homework when telephone rang.

电话响时，我正忙着做作业。

He is usually busy with work.

他工作总是很忙。

When you are busy with a hobby, you leave all your worries behind.

当你忙于一项爱好时，你就会把所有的烦恼都抛在脑后。

I was busy with friends at school and visited my parents less and less.

我总是在学校里和朋友们在一起，回家见父母的时间越来越少了。

When Brigida went out, she found the old man busy with putting a new beam along the wall.

当布丽吉特出去时，她发现老人正忙着沿墙安装一根新梁。

Alone in a desert house, he was so busy with his research work that he felt nothing but lonely.

他独自一人住在沙漠的房子里，忙于他的研究工作，感到孤独。