buy sb sth, buy sth for sb

buy接双宾语时可采用上面这两种语序,但并非任何情况下都可以互换。当直接宾语是名词时,这两种语序都可使用,但直接宾语是代词时,只能用buy sth for sb。例如:他给我买了它。［误］ He bought me it.［正］ He bought it for me.

buy, afford

afford和buy都有“买”的意思,但afford侧重“有无经济能力买”,而buy则侧重“购买的行为”,表示“我买不起”可以说I can't afford,但不可说I can't buy.因为后者的意思是“即使有钱也不准买”。另外, buy常可用在afford后作宾语。

buy, purchase

这两个词共同的意思是“买”。它们的区别是：buy是普通用词,通常用于买菜、买肉、买房子、买珠宝等; purchase是正式用语,表示经过周密计划以后才买,或是由于业务上的需要大规模地购买,所以在许多用purchase的场合都可以用buy,但许多用buy的场合却不一定能用purchase。例如:You can buy anything in that store for less than ten dollars.在这家商店里,花上不到10美元你就可以买上任何东西。They purchased〔bought〕 a new house.他们买了一栋新房子。

下面三个句子意思相同:

He bought me a book from one of his colleagues for ￡5.He bought me a book of one of his colleagues for ￡5.He bought me a book off one of his colleagues for ￡5.他花了5英镑从他一个大学同学那里 给我买了一本书。〖JB)〗

buy，purchase

这两个动词都含“购买”之意。buy普通日常用词，既可指日常随意购物也可指大的购买。purchase正式用词，指大宗购货或购买重要东西。无感情色彩，强调物品的购得。