1.Untilyesterdayhisfamily（hadnotheard）fromhimforsixmonths.2.He（didnot）gotobeduntilhismothercameback.请问为什么都是until,第一句要做成过去完成,第二句是一般过去啊?求详解…急!但notgotobed不

Question

1.Until yesterday his family （had not heard）from him for six months.2.He （did not ）go to bed until his mother came back.请问为什么都是until,第一句要做成过去完成,第二句是一般过去啊?求详解…急!
但not go to bed 不也是持续性动作么

Answer 1

1、时间状语for six months为一段时间,和完成时连用.
2、go to bed是短暂动作,与一般过去时连用比较合理.