all of them made great contributions (to preparing for) the

问题描述:

all of them made great contributions (to preparing for) the 2008 Olympic Games为什么不用to prepare
1个回答 分类:英语 2014-11-16

问题解答:

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因为固定短语made (great) contributions to sth.中的to 是一个介词,介词后面如果要接动词时,要用它的-ing形式,所以用preparing,而不用prepare.
 
 
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