英语基本句式中spend some money on sth.和spend some money in doing st

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。