英语口语中经常使用Phrasal Verbs，而且使用Phrasal Verbs显得更自然。
turn up 1.turn up the TV.2. arrive
head off = leave
be dying for
run out of
pick up = buy/collect
1. About Phrasal Verbs
2.Phrasal Verbs VS. Normal Verbs
look for = seek
go on = continue
put in = install
fill in = complete
make up = invent
（1）但也要注意他们不是完全一样，install 可以安装空调，洗衣机，及软件，但put in不可以安装软件。
即使他们有相同的意思，也不可以互换，比如look for 与seek.
3.How to remember phrasal verbs using prepositions
Sales went down by 15% last year.
I'm trying to cut down on how much coffee I drink.
Can you turn the Tv down? It's too loud.
这3个out都有to many people at one time
He sent out hundreds of job applications.
The handed out immigraton forms before we landed.
The teacher gave out the worksheets.
4.Remember phrasal verbs by using context
Do you want to come along to the cinema tonight?
It's getting late,so I think I'll head off.
I think she's popped out to get sth for lunch.