138. Cost , afford

138. Cost , afford
cost“花费”
Sth cost sb +金钱 表示某物花费某人多少钱
Betty's mother likes beautiful clothes，and her clothes cost her much money every year.


afford "买得起，负担得起"，常与情态动词can连用
afford sth 买得起...
A new house costs a lot of money, I can't afford it.
Afford to do something负担得起做某事
The poor boy has not enough money. So he can't afford to buy the car.