1、在使用spend时,主语只能是表示人的名词或代词。例如:
andy spent a lot of money on books. andy花了很多钱买书。
2、spend time/money on sth.
在……上花费时间（金钱）.介词on后接名词或代词。
例：i spent two hours on this maths problem.
这道数学题花了我两个小时.
3、spend time/money (in) doing sth.
花费时间（金钱）做某事.介词in可以省略。
例：they spent two years (in) building this bridge.
造这座桥花了他们两年时间.
4、spend money for sth.花钱买…….
例：his money was spent for books.
他的钱用来买书了.
另外,spend也有度过的意思。例如:
they want to spend their summer holiday in the country.
他们想去乡下过暑假。