一、spend的主語通常是人，句型有：

1. (sb) spend some money/some time on sth

2. (sb) spend some money/some time (in) doing sth

例如：

I spent fifty yuan on the coat. = I spent fifty yuan (in) buying the coat. 我花50元買了這件大衣。

He spent three days on the work. = He spent three days (in) doing the work. 他干這項工作用了3天。

3. spend money for sth. 花錢買……

例如：His money was spent for books. 他的錢用來買書了。

二、take常用于“占用、花費”時間，后面常跟雙賓語，其主語通常為形式主語"it"或物。句型有：

1. It takes/took sb. some time to do sth

例如：It will take me two days to do the work. 這項工作將會花去我2天時間。

2. Doing sth./sth. takes sb. some time.

例如：The work will take me two days. 這項工作將會花去我2天時間。

Repairing this car took him the whole afternoon. 他花了一下午修車。

It took me three years to draw the beautiful horses. =Drawing the beautiful horses took me three years. 畫這些漂亮的馬花費了我3年時間。

三、pay為“付款、賠償”之意，主語通常是人，句型有：

1. sb. pays some money for sth

例如： I paid fifty yuan for the coat. 我花50元買了這件大衣。

2. pay (sb.) money for sth. 付錢（給某人）買……

例如：I have to pay them 20 pounds for this room each month. 我每個月要付20英磅的房租。

3. pay money back 還錢

例如：May I borrow 12 yuan from you? I'll pay it back next week. 你能借給我12塊錢嗎？下周還你。

4. pay off one's money　還清錢

四、cost的主語是物或某種活動， 還可以表示“值”。句型有：

1. sth. costs (sb.) +money　某物花了（某人）多少錢

例如：A new computer costs a lot of money. 買一臺新電腦要花一大筆錢。

2. (doing) sth. costs (sb.) +time? 某物（做某事）花了（某人）多少時間

例如：Remembering these new words cost him a lot of time. 他花了大量時間才記住了這些單詞。

注意：cost的過去式及過去分詞都是cost，并且不能用于被動句。