新概念英语he was still smiling when the door opened and his wife came in

问题描述:

新概念英语he was still smiling when the door opened and his wife came in
He was still smiling when the door opened and his wife came in.
不是应该在OPENED前加was么?这个动作是被动的啊.

一般不会加was,原句的意思就是表示门开了,并不需要刻意说明门是被打开的.除非有种情况是,需要突出动作的施与者,就要用被动,同时说明动作的施与者.