英语选择题：_____ in thought,...________in thought, he didn't notice his teacher coming into the classroom.A. Lost B. Having lost此题参考答案为A.求教done 与having done之区别.
问题描述：
英语选择题：_____ in thought,...
________in thought, he didn't notice his teacher coming into the classroom.
A. Lost B. Having lost
此题参考答案为A.求教done 与having done之区别.
答
主句是过去时, 前面的分句用完成时, 因主从句主语一样, 前句省略了主语
答
A.选B语法上就错误,最起码也应该是Having been lost,但是这里lost是表示一个状态修饰,类形容词,所以直接lost in thought就可以