that是英语中十分常见的单词，用法灵活多样，是英语中最常用的词汇之一。正因为它是我们认为自己最熟悉的单词，反而容易忽视它。在考研英语中，对that的考查包括三个方面：（1）that作指示代词的用法；（2）that作连词引导各类从句时，需要准确辨别从句类型。

　　一、that 作限定词或代词

　　that可以作限定词或代词连接名词或名词短语，也可单独使用，用以指代人或者物。此外，that不仅可以指代单独的人或物，还可以指代一句话。

　　例：Furthermore, in the early days of long line fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around now. [2006, text3]

　　分析：

　　A.分析句子结构。Furthermore, in the early days of long line fishing, a lot of fish were lost to sharks //after they had been hooked. That is no longer a problem, //because there are fewer sharks around now.

　　第一个句子的主句为a lot of fish were lost to sharks，介词短语in the early days of long line fishing作状语，after引导时间状语从句。第二个句子主句是That is no longer a problem, that为代词，because引导原因状语从句。

　　B.分析that指代。that指代第一句话，"a lot of fish were lost to sharks after they had been hooked"，其中after引导时间状语从句。

　　C.译文：而且，在使用多钩长线捕鱼的初期，许多鱼被钩住后又被鲨鱼夺走。这不再是一个问题，因为附近的鲨鱼更少了。

　　二、that作副词表示程度，相当于so

　　例：It isn't all that cold. 天没有那么冷。

　　三、that作连词引导各类从句

　　（一）that引导名词性从句

　　that后面连接一个完整的陈述句，可以位于主语、宾语、表语或同位语的位置，分别引导主语从句、宾语从句、表语从句和同位语从句。此时，that没有实意，而且不在从句中做任何成分。that引导主语从句和同位语从句时不可以省略。

　　例1：That the plates are moving is now beyond dispute. （主语从句）

　　地球板块是在漂移的，这一事实毋庸置疑。

　　例2：The truth is that everyone should take care of orphan, not just the authorities.（表语从句）

　　事实是，所有人都应该照顾孤儿，而不仅仅是完全由政府承担。

　　例3：All people believed that it was right to rescue the temple. （宾语从句）（注：that可以省略）

　　所有人都认为拯救古庙是正确的。

　　例4：The students expressed their hope that they could be admitted by that university.（同位语从句）

　　学生们表达了他们向被这所大学录取的愿望。