there are only a few steps to doing the experiment 为什么不用to d

学习时间:2026-05-14 02:34:15 阅读：3730

there are only a few steps to doing the experiment 为什么不用to do,而用 to doing

虚幻的冷风

2026-05-14 02:34:15

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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。