buy的过去式： bought；过去分词： bought；
buy：v.买；购买；够支付；买通
We're buying a new TV with the money.
我们要用这笔钱买一台新电视机。
I want to buy a present for my mother and father.
我想给爸爸妈妈买件礼物。
It would be more economical to buy the bigger size.
买尺寸大点的更实惠。
温馨提示：
