大家好，我是东南，我来为大家解答以上问题buy的过去式和过去分词是单数吗，buy的过去式和过去分词是？很多人还不知道，现在让我们一起来看看吧！
例句：
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。
It may be necessary to buy a new one.
也许有必要买个新的了。
本文到此讲解完毕了，希望对大家有帮助。