I'm not gonna tell you what they spent on that wedding... but forty thousand dollars is a lot of money!---《老友記》第一季 第二集
我不想讲他们为此婚礼花了些什么，但是4万块不是个小数目！
一、spend 当花费时间讲的话：
1.spend some time on sth
They spend an hour on their homework.
2.spend some time (in) doing sth （in可以省略的）
They spent three month touring Europe.
二、spend当花费金钱讲的话
1.spend some money on sth
I spent $100 on the bike.
2.spend some money (in) doing sth （in可以省略的）
I spent $100 buying the bike.
总结：呵呵，其实当花费时间金钱来讲用法都一样，记住那两种固定搭配哦。但如果没有点明在什么上的花费，不用on 如：
spend all one's energies
竭尽全力
My cousin will spend the weekend with us.
我表兄要和我一起度周末。
这是本词用法
及物动词 vt.
1.花(钱),花费[(+on/for)]
I spent $100 on the bike.
我花了一百美元买下那辆自行车。
2.花(时间、精力)[(+on)][O4]
They spent three month touring Europe.
他们花了三个月时间周游欧洲。
3.度过;用尽
The storm is spent.
暴风雨已经过去。
My cousin will spend the weekend with us.
我表兄要和我一起度周末。
4.浪费
5.(鱼等)产(卵)
不及物动词 vi.
1.花钱;花时间,花费精力
He spends freely.
他很挥霍。
2.耗尽,用尽
Candles spend fast in draught.
蜡烛在风口点得很快。
3.(鱼等)产卵
名词 n.
1.预算