in which on which at which的區(qū)別：in which可以翻譯成在……里面；on which可以翻譯成在……的上面，或具體時間的某一天；at which可以翻譯成在……里面或在……

引導定語從句時where與in which有時可互換，有時不能互換，注意以下幾點：

當“介詞+ which”在定語從句中作時間、地點和原因狀語時，可以用相應的關系副詞when, where和why來替換。

1. when根據情況可以等于in which, at which, on which等。如：

The day when (=on which) she arrived was Thursday. 她到的那天是星期四。

2. where根據情況可以等于in which, at which, on which等。如：

This is the hotel where ( =in which / at which) they were staying. 這就是他們當時住的旅店。

3. 關系副詞若要換成“介詞+which”只能是for which。如：

The reason why (=for which) I came here was to be with my family. 我到這里來的原因是要跟我的家里人在一起。

來源：高三網