1. why don’t you +动词原形=why not+动词原形
2. study too much (副词，修饰动词)too much homework
too many+名词复数 after-school classes课后辅导班太多
much too+形容词/副词 hot 太热
3. have free time to do sth有空闲的时间干什么
have+time / -thing / - work +to do sth
have sb (sth有动作) do sth=let/make sb do sth
have sth(无动作) done 叫人把……干了
I have my hair cut(过去分词).我叫人把头发理一下。
4. allow sb (not)to do sth允许某人干什么=be allowed to do sth
5. allow doing sth 允许做某事 not allow=refuse
6. surprise sb 使某人惊讶
7. get into a fight with sb 和某人打架=have a fight with sb
= fight with sb (fight - fought- fought)
8. hang out with sb 和某人一起闲逛(hang-hung-hung)
hang over 笼罩在……上