spent 加on还是in

都有，spent是spend的过去式

spend

/ spend; spɛnd/ v (pt, pp spent / spent; spɛnt/)

~ sth (on/sth) 用（钱）; 花（钱）:

He spends as if he were a millionaire. 他用起钱来像个百万富翁似的.

* She's spent all her money. 她把钱都花光了.

* He spends too much (money) on clothes. 他在衣着上花费太大.

~ sth (on sth/in doing sth)

花（时间等）:

spend a lot of time on a project/(in) explaining a plan 花很多时间进行某项目[解释某方案]

* spend one's energy cleaning the place up 用力气把那地方打扫乾净.

用完, 耗尽（某物）:

The blizzard quickly spent itself, ie used up all its force. 暴风雪很快就停了下来.

* They went on firing until they had spent all their ammunition. 他们不停地射击, 耗尽了所有的弹药.

* I've spent all my energy on this. 我对此事已呕尽心血.

度过, 消磨（时间）:

How do you spend your spare time? 你业余时间怎麽打发?

* spend a weekend in Paris 在巴黎过周末

* spend summer holidays by the sea 在海滨过暑假.