过去式 bought；过去分词 bought；
buy
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
Now is a good time to buy a house.
现在买房子正是时候。
He gave his children the best education that money can buy.
他让孩子们接受花钱能买到的最好的教育。
We might buy it but then again we might not.
我们可能买，不过也可能不买。
