An accident happened to the poor man yesterday.
昨天那个可怜的人发生了车祸
I happened to meet my teacher on my way home yesterday.
昨晚回家的时候,我碰巧遇到我的老师
What is the weather like today?
今天天气怎样?
What was the weather like yesterday?
昨天
What will the weather be like tomorrow?
明天
肯定都对