定语从句中什么时候只能用that

问题描述:

定语从句中什么时候只能用that

宜用that,不用which或who,whom的场合 1. 当先行词是不定代词或被不定代词修饰时.如 Tell me everything that you know. / All the people that are working are my workmates.2. 当先行词是序数词或被序数词修饰时...