1任何区别关系代词 which 与 that？一关系代词一关系代词 which 和和 that 两者指物时，常可通用。例如：两者指物时，常可通用。例如： 1）This is the black pen that /which he likes very much.2）A bookshop is a shop that/which sells books.3）I want to go to a place that/which is warm.4）There are many nice pictures in the book that/which I like5）We want to know the reason that/which is right.6）The room (which/that) she lives in is a large one.7）Everyone likes books that/which are interesting.8）In the river, there are some boats that/which look like geese 二关系代词二关系代词 that 也可以指人（相当于也可以指人（相当于 who 或或 whom） ，决不可改用（，决不可改用（which 只能指物）只能指物） 。 例如：例如： 1）The man who/that works in the office is a math teacher?2）Whos the man ( whom/that ) we saw just now? 三关系代词三关系代词 which 和和 that 指物时的比较指物时的比较指物时两者常可通用，但下列情况不可以换用： 1. 先行词为 all, few, little, many, much, something(anything, everything, nothing), one of 等不定代词时，常只可用 that。例如： 1）Thats all ( that ) I know.2）Is there anything ( that ) I can do for you?3）This is one of the presents ( that ) my friends gave me on my birthday.2先行词被 all、any、few、little、many、much、no、only、just、very 等修饰时，多 用 that。例如：1）The only thing ( that ) we can do is to wait.2）In the book, there are no stories that are exciting. 3先行词是序数词、adj.最高级时，或者先行词被序数词、adj.最高级修饰时，常只用 that。例如：1）The first thing that we should do is to work out a plan.2）This is the most interesting book ( that ) I have read.4. 关系代词 which 作定语从句中介词的宾语时，有时介词可提到 which 之前。而关系 代词 that 也可作定语从句介词的宾语，但介词却不可提到 who，也就是说在介词后 不可用关系代词 that。例如：The room (which/that) she lives in is a large one.=The room in which(that) she lives is a large one.5. 先行词既有人又有物时，只可用 that 例如：。The writer and his book that you talked about is really well-known. 6非限制性定语从句不可用 that 引导，只可用 which（指人时，用 who 或 whom） 。 例如：This is the best movie that I have seen.这是我看过的最好的一部电影。比较：Last night, I saw a good movie, which(that) was about Lei Feng.昨天晚上，我们看了一部电影。这部电影是关于雷锋的故事。