he was still smiling when the door opened and his wife came inthe door opened,我听过open the door,这里是怎么回事?

问题描述:

he was still smiling when the door opened and his wife came in
the door opened,我听过open the door,这里是怎么回事?

这是个时间状语从句,在when the door opened and his wife came in这个从句里面做状语.

是倒装

这是一个句型
be (过去进行时) doing something when something else happened (过去时)
他仍在笑时门开了,太太走了进来.(说明他没想到太太会在这里到来.)