buy的過去式是bought，過去分詞是bought。作及物動詞時意思是購買；買；獲得；收買。作不及物動詞時意思是買。作名詞時意思是購買；便宜貨。比如：I bought him a drink in return for his help。我請他喝酒以酬謝他的幫助。

buy的用法

一.buy用作動詞

1.buy的基本意思是用金錢換取等價物,即“購買”,是普通用詞,可接具體物品如書籍、衣物等作賓語。buy也可表示“付出…以換取…”,這時可接健康、幸福、名聲、忠誠等抽象名詞作賓語。buy引申還可指“收買,賄賂”“相信(即買…的賬)”。

2.buy在句中主要用作及物動詞,偶爾用作不及物動詞。用作及物動詞時,后接名詞或代詞作賓語,有時還可接雙賓語,其間接賓語可轉化為介詞for的賓語�？捎糜诒粍咏Y構。

Money can't buy happiness.

金錢買不來幸福。

I bought him a drink in return for his help.

我請他喝酒以酬謝他的幫助。

3.用作不及物動詞 (vi.)

A lot of people just come into the shop without buying.

有很多人進店但卻不購物。

二.buy用作名詞

buy作名詞時的意思有二:一是“買賣”,指用于商品交換間的交易; 二是“便宜貨”,指價格上略低的貨物。

It's a good buy at that price.

這是一筆價錢合算的買賣。

That shirt was a really great buy.