spend的主語必須是人,常用于以下結(jié)構(gòu)：
(1) spend time ／money on sth.在……上花費(fèi)時(shí)間（金錢）.例：I spent two hours on this problem.這道題花了我兩個(gè)小時(shí).
(2) spend time ／ money (in) doing sth.花費(fèi)時(shí)間（金錢）做某事.例：They spent two hours finishing doing homework.他們花了兩個(gè)小時(shí)做作業(yè).
cost的主語是物或某種活動(dòng),常見用法如下：(1)sth.costs sb.Some money,某物花了某人多少錢.例：A new computer costs me a lot of money.買一臺(tái)新電腦花了我一大筆錢.
(2) doing sth.costs sb.Some time ,做某事花了某人多少時(shí)間.例：Remembering these new words cost him a lot of time.他花了大量時(shí)間才記住了這些單詞.Take一般用it做形式主語,常見用法有以下幾種：(1) It takes sb.Some time to do sth.做某事花了某人多少時(shí)間.例：It takes about 10 minutes.花費(fèi)了10分鐘
Pay主語是人,有很多種用法：(1) sb.pay some money for sth.某人為某物付款.例如：I paid 5 dollars for the book.
哎,字好多啊