buy的过去式和过去分词两种

buy过去式： bought过去分词： bought

v.买;购买;够支付;买通;收买;贿赂

n.合算的商品;买进(或出售)的东西;购买

第三人称单数： buys现在分词： buying

We need to buy some new furniture.

我们需要买一些新家具。

They've bought themselves a new car.

他们给自己买了一辆新车。

I went to buy a paper at the corner dairy.

我到街角的小店去买了份报纸。

You'll have to choose whether to buy it or not.

买还是不买，你得作出选择。

Could you watch my bags for me while I buy a paper?

我去买份报纸，你能替我照看一下我的包吗？