spend...on

spend...on
在……花钱
He doesn't spend much time on his homework.
他花在作业上的时间不多。
She would pinch on food in order to spend on clothing.
她过去常把伙食费省下来买衣服。
Because of inflation, they had to spend more money on food.
因为通货膨胀，他们不得不在食品上花费更多的钱。
People lose control of the time they spend on the Internet.
人们不能控制他们在网络上所花费的时间。
It's very shortsighted not to spend money on repairing the house.
不想花钱修理房子，这是缺乏远见的。

详解：

spend for, spend in, spend on
这三个短语的共同意思是“在…花费…”。其区别是：
1.spend in和spend on既可以用于时间,也可以用于金钱; 而spend for只可以用于金钱。
2.spend on和spend in后既可以接名词,也可以接动名词; 而spend for后多接名词。
spend的宾语后常可接以介词in〔on, for〕引导的短语表示“把…花在…上”,介词宾语可以是名词,也可以是动名词。以动名词作宾语时介词in常可省略,尤其在口语中。
3.spend on和spend in在语义上有细微差别。试比较:
He spent a week in touring these six cities.
他用了一周时间游览这六个城市。
(强调动词宾语)
He spent a week on touring these six cities.
他把一周的时间花费在游览这六个城市上。
(强调介词宾语)
她耗费了三个小时看电视。
误 She spent three hours to watch TV.
正 She spent three hours (in) watching TV.
他花了许多时间为考试做准备。
误 He spent much time to prepare for the examination.
正 He spent much time preparing for the examination.
析当强调“花费时间做某事”时,常用spend time (in) v -ing, in可以省略,但spend后不能用动词不定式。
昨天晚上我去看电影了,你怎么度过的?
误 Last night I went to a movie. How did you spend?
正 Last night I went to a movie.How did you spend the night?
析 spend表示“度过”时是及物动词,其后要接宾语。
我们在纽约过得很愉快。
误 We spent a good time in New York.
正 We had a good time in New York.
析表示“过得愉快,玩得高兴”可用成语have a good time〔enjoy oneself〕,不可说spend a good time。
我们去电影院,以消磨火车到达以前的那段时间。
误 We went to the cinema to spend the time until the train arrived.
正 We went to the cinema to pass the time until the train arrived.
析 spend和pass都可表示“度过(时间)”,但是为避免无所事事或感觉厌烦而做某事以消磨时间通常用pass。

speed up<-->stand for