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英语
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there are only a few steps to doing the experiment 为什么不用to do,而用 to doing
人气:226 ℃ 时间:2020-03-29 17:28:22
解答
因为后面的to doing the experiment
是前面steps的定语
并且此地to是介词,不是动词不定式,所以用to doing.
类似的还有,the key to the door,the answer to the question,to都是介词.
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