1、I spent half an hour(working on)this difficult math problem 括号里为何填working on 而不是to wo
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1、I spent half an hour(working on)this difficult math problem 括号里为何填working on 而不是to wo
spend 有两个用法:spend some time (in)doing sth.spend some time on sth.
It takes sb some time to do sth.
上面的区别就可以很清楚说明如何填这个空了.
spend 后可以跟不定式,也可以跟动名词,所以跟working on是可以,当然也可以填写to ....
spend doing....
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