我们正在吃饭的时候，有人敲门。

As we were having dinner, someone knocked at the door.

youdao

我们正在吃饭的时候，他过来看我们。

Whilst we were having dinner, he came over to visit us.

youdao

我们正在吃饭的时候，他们来拜访我们了。

They called us just as we were having dinner.

youdao

我们正在吃饭的时候，他们来拜访我们了。

They called us just as we were having dinner.

youdao