谁能帮我找一下英语语法,比如be busy doing sth 这样的
谁能帮我找一下英语语法,比如be busy doing sth 这样的
分析一下句中的语法,比如:I am busy doing my homework.be busy doing sth:忙
be busy in doing sth
be busy doing sth 例句
be busy doing sth/with sth
be busy doing sth 和be busy to do sth 的区别
be busy (in) doing sth 和be busy with sth的意思 并做一组句子
be busy with sth 与be busy doing sth的区别
be busy with sth 与be busy doing sth的区别 ,可以互换吗
be busy with sth 与be busy doing sth
be busy doing sth和be busy with sth
be busy with sth.be busy doing sth.