问题补充:
What was he doing his father back?
A. while; came B. when; came C. when; was coming
答案:
解析:句意:当他的父亲回来的时候,他正在做什么?while当……时候,后跟的动词通常是持续性动词;when当……时候,后跟的动词通常是持续性动词或非持续性动词;因为在主句里的动作发生在过去,所以从句的动作也是发生在过去。根据句意故选B。
时间:2023-10-14 22:33:55
What was he doing his father back?
A. while; came B. when; came C. when; was coming
解析:句意:当他的父亲回来的时候,他正在做什么?while当……时候,后跟的动词通常是持续性动词;when当……时候,后跟的动词通常是持续性动词或非持续性动词;因为在主句里的动作发生在过去,所以从句的动作也是发生在过去。根据句意故选B。