be busy+in还是on还是at还是不加

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/10 13:15:10

e busy in doing sth（正忙于做某事）,一般将in省略了,就写成be busy doing sth了
没见过be busy on或者at的,只有be busy with sth,意思和be busy in doing sth一样,如：
1.be busy with sth
例如:I am busy with my homework!
2.be busy in doing sth
例如:I am busy in doing my homework!

be busy with study还是be busy at study be busy with与be busy at 在具体时间前加on还是in还是at? the summer 前加on还是in还是at be strict with sth后加at还是加in 英语翻译用on还是in还是at in 还是on还是 at tomorrow 是be an expert in/at/on ,还是be expert in/at/on? gril在句首加at 还是 for还是 in 还是加on . be talented in还是at 词组,是ceremony前加at还是in ,on? trip前加什么介词是in on 还是 at Christmas Eve前加in at to还是on