buy在句中主要用作及物动词，偶尔用作不及物动词。bought用法表示在某商店买可接介词at；表示从某处买可接介词from、of、off；表示花多少钱买可接介词for、at。
例句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。They\'ve bought themselves a new car.他们给自己买了一辆新车。
