Take和Spend有什么不同？用在那里？

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。
take后面常跟双宾语， 常见用法有以下几种：
(1) It takes sb. ＋时间＋to do sth. 做某事花了某人多少时间。例：It took them three years to build this road. 他们用了三年时间修完了这条路。
(2)doing sth. takes sb. ＋时间,做某事花了某人多少时间。例：Repairing this car took him the whole afternoon. 他花了一下午修车。
希望有所帮助

take常以“something/it”作主语。spend常以“somebody"作主语。
搭配：
It/Something takes sb. some time/money to do sth.
Sb. spends some time/money (in) doing/on sth.