1.be busy(in )doing 2.be busy to do 3.be busy with 4.be busy for区别?

be busy in doing sth 1.be busy(in )doing 2.be busy to do 3.be busy with 4.be busy for区别? be busy doing 和 be busy in doing 的区别? BE BUSY IN DOING 的例句 be busy doing中,有in么? be busy in 的用法?它和be busy doing, be busy with有什么区别? busy的用法be busy with后面加什么词be busy in doing与be busy with doing与be busy doing有什么区别 be busy doing造句 有没有be busy in doing sth.（忘了-_- be+busy+doing=be+( )+( be busy doing 是不是省略了in 应该是 be busy in doing 还有 上面两个跟be busy with 有什么区别么 be busy with doing 和be busy in doing 在用法上有何区别如题 be busy with doing 与be busy doing 区别 be busy doing等于什么 be busy doing sth 例句 be busy doing 过去式+造句 jean is busy cooking in the kitchen是不是错句?不是be busy doing sth?为什么没有sth?be busy doing是谓语动词? 1.be busy doing sth 2.be busy with sth分别造个句,