你什么时候回巴黎?
When are you ___going ___back to Paris?
开始下雨了,所以我回去拿我的钥匙。
It had started to rain so I ___went ___back for my keys.
所以我回到教室,拿起我的包回家了。
So I ___went ___back to the classroom, picked up my bag and went home.