过去进行时的When是接在持续的动作,而突发的事件用过去时吗如When she was walking down the street,the UFO landed in front of me ↓ ↓持续动作 突发事件

问题描述:

过去进行时的When是接在持续的动作,而突发的事件用过去时吗
如When she was walking down the street,the UFO landed in front of me ↓ ↓
持续动作 突发事件

是的.如:she was walking down the street,when the UFO landed in front of her.