be busy doing 过去式+造句

be busy doing 过去式+造句 be busy doing造句 be busy doing造句10个 用be busy doing sth.句型造句 be for from ,be busy doing 分别造句 be busy doing sth.造句（注中文）! 请用be busy doing sth 的句式造句 be busy doing sth.造句（注中文） be+busy+doing=be+( )+( 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 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 造句,各两句.be worth doing 值得做...be busy doing.忙着做 too...to do 太..而不能做 be busy with sth 与be busy doing sth be busy doing还是be busy to dokuai