buy后面加什么格
答加宾格，buy是动词 充当谓语构成主谓宾结构。
buy作为及物动词，后面直接直接名词，不用加介词，of 就是个介词；
作为不及物动词，一般用to buy；
有短语buy off，意为买通、贿赂。
The curtains were an impulse buy.
这窗帘是一时心血来潮买下的。
We need to buy some new furniture.
我们需要买一些新家具。
Now is a good time to buy a house.
现在买房子正是时候。
They only buy the best.
他们只买最好的。
Try the shoes on before you buy them.
鞋子要先穿上试一试再买。