摘要：只能that用做关系代词的情况. 1>.当先行词是all, everything, anything, nothing, much, little, none, one等不定代词时.只用that. 歌诀助记:不定代词这路货.全用that准没错. Pay attention to everything that I do. 2>.当先行词被序数词或形容词最高级修饰时.只用that. 歌诀助记:先行词前被限定.千万不要用which. This is the best novel have read. 3>.如果出现两个或两个以上的先行词.并同时兼指人和物时.关系代词用that. 歌诀助记:两项并列人与物.引导定从用that. They were talking about the person and things that they remembered in school. 4>.当先行词被the only, the last, the way, the same等等修饰时. This is the last time that I shall give you a lesson. 5>.在疑问词who, which, what开头的特殊疑问句中,为了避免重复只用that. Which of the students that knows something about history. 6>.当定语从句为there be 句型时.关系代词只能用that,也可以省略. This is the fastest train there is to Beijing. 7>.当指人或物的关系代词在定语从句中做表语时.关系代词只能用that,也可以省略.如: China is not the country it was. 8>. 当先行词被All, every, no, some, any, little, much等修饰时.只用that. He has little time that he can spare. 9>.当被修饰的成分是数词时.(被修饰成分是代名词one.指人时除外)只用that. I’ve got one that you might be interested in.

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