用be busy doing 和be glad that共造一个造句 中英 急

be busy doing 和 be busy in doing 的区别? be busy doing造句 be+busy+doing=be+( )+( be busy in 的用法?它和be busy doing, be busy with有什么区别? 用be busy doing sth.句型造句 用be busy doing 和be glad that共造一个造句 中英 急 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 in doing sth be busy doing 过去式+造句 be busy doing sth和be busy with sth这两个句式的意思和用法 be busy doing sth和be busy with sth这两个句式的意思和用法, be busy to do sth.和be busy doing的区别 be busy doing sth 和be busy to do sth 的区别 be busy doing sth和be busy with sth用法详细讲解 “使忙于”用英语怎么说?要动词,别说be busy doing be busy with he is always busy___ (work)是用be busy doing sth还是 be busy with sth