while引导的从句(选择题)The singer is singing happily ( ) guitar crazily.A.while playing the B.while he played theC.while playing D.while he played选B怎么不行了,从句啊

while引导的从句(选择题)The singer is singing happily ( ) guitar crazily.A.while playing the B.while he played theC.while playing D.while he played选B怎么不行了,从句啊 while引导的从句表示 While He Yan was at the doctor's,I was going to the class.while引导的从句是用进行时,这里用的却是过去时? while.引导什么从句.怎样用 while引导的从句时态,主句时态 ,when引导的从句时态,主句时态 状语从句的问题They were surprised a child should work out the problem while they themselves couldn’t.这里的while引导的是什么状语从句? 让步状语从句的引导词让步状语从句中是否有while做引导词 when和while引导的时间状语从句的语法 when和while引导的时间状语从句的区别. 以when合while引导的从句的时态 when while 引导的从句的区别 ,还要举例 while 引导让步状语从句的时候是什么意思 when 和while 引导时间状语从句的区别? He's anxious that he lost the key.that 引导的从句是什么He's anxious that he lost the key.that 引导的从句是什么成分? while引导的时间状语从句主句和从句的时态分别是什么 while引导的时间状语从句和when引导的时间状语从句有什么区别吗? when和while引导的时间状语从句 主句和从句用什么时态?有几种情况? when、while引导的时间状语从句主句用什么时态 从句用什么时态