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。
1. that 作指示代词：
That is my book. 那是我的书。
2. that 作指示形容词：
We haven't found any solution to deal with that problem yet. 我们仍未找到解决问题的办法。
3. that作关系代词引导定语从句：
This is the sort of thing that Jeremy loves. 这是杰里米喜欢的东西。
4. that 作连词：
that 可以作连词引导各种名词性从句，包括宾语从句、主语从句、同位语从句和表语从句。
1) that 作连词引导宾语从句：
They have recommended that the site be closed and repaired. 他们建议将该处关闭并进行维修。
2) that 作连词引导主语从句：
That you will win the medal seems unlikely. 你想获得奖牌看起来是不可能的。
3) that 作连词引导同位语从句：
The idea that modern art can only be seen in museums is mistaken. 现代艺术只能在博物馆才能见到的想法是错误的。
4) that 作连词引导表语从句：
One problem is that I don't look any different from other people. 有一个问题是我看起来和其它人没有任何不同。
5. that作副词：
that和 this 都可以作副词，用于修饰形容词或修饰另一个副词，表示“这么，那么，如此，这般”的意思，
如:It's about that long. 它大约有那么长。
6. that的常见句型搭配：
①so that以便, 以使；以致
②in order that为了
③except that除了(...之外); 只是
④now that既然, 由于
⑤provided that如果,倘若
⑥not that倒不是, 并不是说
⑦granted that假使, 假定, 就算
⑧seeing that由于, 因为, 鉴于
⑨To think that没想到..
扩展资料
that读音：
英音[ðət]，美音是[ðæt]，
that可用作形容词、代词、连词、副词，还可用于固定搭配。
释义：那;那个,那人,那事,那东西
参考资料：百度百科-that
本回答被网友采纳that的用法有：
1、that用作指示代词的意思是“那,那个”。可指前面提到的那件事,也可指在空间或时间上较另一事物远的事物或人,还可指要表明的或要提及的事物、想法等。
2、that用作关系代词时,指人或事物,同时又在从句中充当句子成分。that偶尔也可引导非限制性定语从句。
3、that还常用以代替who, whom, which,但that...which中的that用做关系代词的先行词。
4、that用作连词时可引导主语从句、宾语从句、表语从句、同位语从句和状语从句。
扩展资料
that
英 [ðæt] 美 [ðæt, ðət]
det.那个，那
pron.那个，那
conj.多么;如此…以至;用于某些动词、形容词和名词后，引出各种从句
adv.不那么;那样
相关例句：
1、Not even Gary, he said, was that stupid
他说，就连加里也没有那么蠢。
2、I would have walked out, I was that angry
我差点中途退席，我太生气了。
3、I hate to be nasty and all that
我不想讲些难听的话什么的。
4、It's interesting that you like him
你喜欢他，这真有意思。
5、You should have learned to walk away from things that don't concern you.
你早就应该学会不去多管闲事。
本回答被网友采纳它用来指已被提到的人或物；也可表对比，指两个中较远的那个。
What about that book you borrowed from me last month？
请注意，that 有时候在句子中具有喜欢或轻蔑等感情色彩。
that little son of his 他那个小宝贝儿子
That George！乔治那家伙！（含有轻蔑语气）
第二、that 用作代词。
1. that 用作指示代词（复数形式是those），其指代意义同形容词用法，同时它还可以用作定语从句中的先行词；还可为了避免重复，代替前述名词。
That is what he told me.
What is that (which) you have got in your hand?
The price of rice is higher than that of flour.
2. that 用作关系代词，引导限制性定语从句。先行词可人可物，用法相当于who或which。（但是在下列情况下多用that：先行词既有人又有物时；先行词有形容词最高级、序数词、不定代词、very，only等修饰时；先行词是不定代词时）
He talked about the teachers and schools that he had visited.
I think it one of the most wonderful films that the film company has ever produced.
She has little information that is useful for our research.
Is there anything that I can do for you?
请注意，that 在定语从句中作宾语时通常可省略。
The books (that) I sent you will help you in your studies.
第三、that 用作连词，引导名词性从句,状语从句和强调句。
1. that名词性从句。
①引导宾语从句。及物动词后的引导词that可省略。
I didn't expect (that) he could win the championship.
The teacher pointed out that Tom was not working hard enough.
② 引导主语从句。通常采用it作形式主语的句型。
That the earth goes around the sun is known to everyone.
（It is known to everyone that the earth goes around the sun.）
③引导表语从句。
The trouble is that we are short of money.
④引导同位语从句。
引导同位语从句的that和引导定语从句的that是不同的。前者只起语法作用，在从句中不作任何成分；而后者在定语从句中作主语、宾语或表语。举例说明：
The news that he resigned from office surprised us.
The idea that he holds is very common nowadays on campus.
2. that引导状语从句
①引导目的状语从句。
Bring it nearer that I may see it better.
②引导结果状语从句。
What have I done that he should be so angry with me?
③引导原因状语从句。
I am afraid that I will fail in the driving test.
④引导让步状语从句。意为“虽然、尽管”。
Difficult that/as the task was, they managed to accomplish it on time.
⑤引导条件状语从句。意为“假使、假设”。
Supposing that you were in my position, what would you do?
On condition that you were lost in the desert, you should ask for help as soon as possible.
3. 引导强调句。
It is Mrs. White that makes the decision in her family, not her meek little husband.
It is an ill wind that blows nobody good.
第四、that用作副词。
1. that用作普通副词。
I was that/so angry I could have hit him.
2. that用作关系副词。引导定语从句，可以代替when，where， why或 in which，常可省略。
I will never forget the evening (that) / when we went to the theatre.
The house (that)/where I used to live has been knocked down.
第五，与that 有关的常见重要短语。
1. in that，意为“既然、因为”。
Criticism and self-criticism is necessary in that it helps us correct our mistakes.
2. now that，意为“既然、由于”。
Now that they have taken matters into their hands, the pace of events has quickened.
3. see (to it) that，意为“注意、务必做到、保证”。
We will see to it that she gets home early.
See to it that you are not late again.
4. seeing that，意为“鉴于、由于”。
Seeing that it is 8 o'clock, we'll wait no longer.
Seeing that he was busy with his work, I didn't disturb him本回答被网友采纳