(2)不定代词如anything, nothing, the one, all, much, few, any, little等作先行词时，只用that，不用which；

　　(3) 先行词有the only, the very修饰时，只用that；

　　(4) 先行词为序数词、形容词最高级时，只用that；

　　(5) 先行词既有人，又有物时。

　　【真题例句】To paraphrase 18th-century statesman Edmund Burke, "all that is needed for the triumph of a misguided cause is that good people do nothing."(2003阅读2)

　　【结构分析】本句的直接引语中，主干为一个主系表结构all is that…，其中主语all由that引导的定语从句that is needed for the triumph of a misguided cause修饰，关系代词that指代先行词all在从句中作主语。表语由that引导的名词性从句that good people do nothing充当。

　　【参考译文】用18世纪政治家埃德蒙·柏克的话说："一个被误导的事业如果能成功，它唯一需要的就是好人无所作为"。

　　【真题例句】The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the 19th century and then by several local geological journals in the 20th century. (2001阅读1)