只能用that引导的定语从句
只能用that引导的定语从句，有哪些呢？下面我将介绍5种常见的情况：
1当先行词为all, much, none, something, nothing, everything, the one, few, little, many, anything等不定代词时。
例如：We should do all that is useful to the people. 我们应该做一切有益于人民的事情。
2 当先行词被only, any, few, little, no, all, many, much等不定代词修饰时。
例如：I have finished reading all the books that I borrowed from the library. 我己经看完了所有从图书馆借来的书。
3.当先行词被序数词、形容词最高级以及the only, the very, the next, the last等修饰时。
例如：This is the first book that I bought in the shop . 这是我在这家书店买的第一本书。
4.先行词既指人又指物时。
例如：We talked of things and persons that we remembered. 我们谈起了我们记住的人和事儿。
5.句子的前一部分已经出现了which,为避免重复，句子的后面部分通常不再用 which而用that来引导限制性定语从句。
例如：Which is the book that you bought yesterday? 哪一本书是你昨天买的？
6.在there be句型中,只能用that。
例如：There was still a lot of homework that we had to do in our spare time.我们在业余时间仍然必须做很多作业。
