问一下by which ,还有in which等which前面加介词的怎么在句子中使用?

问题描述:

问一下by which ,还有in which等which前面加介词的怎么在句子中使用?

这个要根据which后面的谓语动词来决定用by,in还是其它.For which he is well paidn后面那个单词是paidby到......为止
in在世纪/年/季节/月/早上下午晚上