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。
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
1、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。
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。
2、that引导定语从句
that引导定语从句,在从句中充当主语、表语或者宾语,既可以指代人,也可以指代物。that在定语从句中作宾语时,引导词that可以省略。
The professor that you admire most will visit our university next month.
你敬仰的那个教授下月会到我们学校参观。
3、that与其他单词结合引导状语从句
that可以和其他单词结构共同引导状语从句,例如such...that,so...that等引导结果状语从句,in order that,so that等引导目的状语从句,in that,now that,on the grounds that等引导原因状语从句。
She has made such rapid progress that before long she could pass the exam.
她进步很快,不久就能通过考试的。
4、that引导强调句
"It is/was+被强调部分+that从句"是高频使用的一种强调句型,其中被强调部分可以作从句的主语、宾语和状语等。强调句中去掉"it is/was"和"that"后,句子成分和语义仍然完整。
It was after the war was over that Einstein was able to come back to his research work again.
战争结束后爱因斯坦才能重新进行他的研究工作。
扩展资料
that与which的区别:
1、引导非限制性定语从句时,通常要用which:
The current, which is very rapid, makes the river dangerous.
水流湍急,使这条河很危险。
2、直接放在介词后作宾语时,通常要用which:
She may be late, in which case we ought to wait for her.
她可能晚到,那样我们就要等等她。
3、当先行词是下列不定代词或被它们修饰时much, little, none, all, few, every(thing), any(thing), no(thing) 等时,通常用that:
All that she lacked was training.
她缺的只是训练。
4、当先行词有the very, the only, the same 等修饰时,通常用that:
This is the only example that I know.
我知道的例子只有这一个。
5、当先行词有形容词最高级或序数词(包括last, next等)等修饰时,通常用that:
This is the best dictionary that I’ve ever used.
这是我用过的最好的词典。
6、当关系代词在定语从句中用作表语时,通常用that:
China is not the country (that) it was.
中国已不是过去的中国了。
7、当先行词是一个既指人又指物的并列词组时,通常用that:
They talked about the persons and things that most impressed them.
他们谈论了使他们印象最深的人和事。