What were you doing when the UFO arrived?是个什么从句?
问题描述:
What were you doing when the UFO arrived?是个什么从句?
谢谢
答
1.when是at or during the time that, 既指时间点,也可指一段时间;2.when 说明从句的动作和主句的动作可以是同时,也可以是先后发生;3.由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和...