buy的过去式、将来式、现在式.最好都能造个句子,

问题描述:

buy的过去式、将来式、现在式.
最好都能造个句子,

buy [bai]
n. 购买,买卖
v. 买
例句与用法:
It's a good buy at that price.
这是一笔价钱合算的买卖.
They bought peace with their freedom.
他们牺牲*换取和平.
Money can't buy happiness.
金钱买不来幸福.
词形变化:
形容词:buyable
动词过去式:bought
过去分词:bought
现在分词:buying
第三人称单数:buys
I bought a book yesterday.
I will buy a cat.