介词+which/whom引导的定语从句用于正式场合。在这一结构中，关系代词which/whom做介词的宾语。
1.当先行词是人时，用介词+whom引导定语从句，
E.g.：They may start as a group of high-school students, for whom practising their music in someone’s house is the first step to fame.
2.当先行词是物时，用介词+which引导定语从句，而且只能加which，不能加that，
E.g.: They produced a new record in 1996, with which they celebrated their former time as a real band.
3.关系副词可以替代介词+which/whom结构。
where可以替代to/at/from/in which,
E.g.：They visited the city where/in which John Denver was born.
when可以替代during/at/in/on which，
E.g.：I will never forget the year when/in which our band started.
why可以替代for which，
E.g.: The reason why/for which he left the band was that he hated the busy life.
4.the way in which/that/_____引导定语从句
