buy的过去式：bought；
buy就是一个单词的原型。
例句：
I bought a coat in the sales.
我在大减价时买了一件外套。
We bought the house on a whim.
我们一时冲动买了这所房子
扩展资料
She bought drinks all round.
她给每个人都买了饮料。
I bought the camera second-hand.
我买的这架照相机是二手货。
I bought my car second-hand.
我买了一辆二手车。
