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. 他们牺牲自由换取和平。 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

给某人买某物 buy sb sth buy sth for sb 1. 用作动词，表示“买”，可带双宾语；若双宾易位，通常要用介词 for。如： 我叔叔为我买了本英语词典。 正：My uncle bought me an English dictionary. 正：My uncle bought an English dictionary for me. 2. 表示向某人买某物，通常用介词 from。如： He bought this watch from a friend. 他从一位朋友那儿买了这块手表。 3. 表示用多少钱买某物，通常用介词 for。如： I bought the computer for $600. 我花600美元买了这台电脑。 He bought it for very little money. 他买它只花了一点点钱。 【注】有时也用介词 at, 侧重指价格。如： He bought them for [at] 10p each. 他以每个10 便士的价格买下了它们。 4. 是终止性动词，因此在肯定句中不宜与一段时间连用。如： 这房子我已买了十年。 正：I bought this house ten years ago. 正：I have had this house for ten years. 正：It’s ten years since I bought this house.