1）buy
I want to buy a sweater for my mom.=I want to buy my mom a sweater.
A.动词buy和介词___for_______搭配,与for搭配的动词还有：cook...for,____ask for,look for_____________
B.buy sth for sb.=_____buy sb.sth.________________
2) afford
Can we afford the new house?
Your sentences:I can't afford a car.______.
afford常与情态动词can连用,其后常加____名词或者不定式______
3) sale
These socks are on sale.在这个句子中,sale是___名__词,短语“廉价销售”为___on sale__________;sale的动词为_____sell_______.意思是“卖”.如：We sell many different kinds of T-shirts.
1、The pants__sell___well in this shop.
2、Come and buy these clothes.They are __on____ __sale____.
4)yourself
yourself这样的词在英语中叫___反身代词______.你还知道其它这样的词吗?写一写吧!myself ourselves,yourself,yourselves,himself,herself,themselves.