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spent..for与pay..for的用法

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spent..for与pay..for的用法
spend的主语必须是人, 常用于以下结构: (1) spend time /money on sth. 在……上花费时间(金钱).例:I spent two hours on this maths problem. 这道数学题花了我两个小时. (2) spend time / money (in) doing sth. 花费时间(金钱)做某事.例:They spent two years (in) building this bridge. 造这座桥花了他们两年时间. (3)spend money for sth. 花钱买…….例:His money was spent for books. 他的钱用来买书了. cost的主语是物或某种活动, 还可以表示“值”, 常见用法如下: (1)sth. costs (sb.) +金钱,某物花了(某人)多少钱.例:A new computer costs a lot of money. 买一台新电脑要花一大笔钱. (2) (doing) sth. costs (sb.) +时间,某物(做某事)花了(某人)多少时间.例:Remembering these new words cost him a lot of time. 他花了大量时间才记住了这些单词. 注意:cost的过去式及过去分词都是cost,并且不能用于被动句. pay的基本用法是: (1) pay (sb.) money for sth. 付钱(给某人)买…….例:I have to pay them 20 pounds for this room each month. 我每个月要付20英磅的房租. (2)pay for sth. 付……的钱.例:I have to pay for the book lost. 我不得不赔丢失的书款. (3)pay for sb. 替某人付钱.例:Don?蒺t worry!I'll pay for you. 别担心, 我会给你付钱的. (4)pay sb. 付钱给某人. 例: They pay us every month.他们每月给我们报酬. (5)pay money back 还钱.例:May I borrow 12 yuan from you? I'll pay it back next week. 你能借给我12块钱吗?下周还你. (6)pay off one's money还清钱.