根据情况而定，在非限制性定语从句中，很少用that。
不用that的情况
1、 在引导非限定性定语从句时。
2、介词后不能用。
只能用that作为定语从句的关系代词的情况
1、在there be 句型中，只用that，不用which。
2、 在不定代词，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，the same，the last，just修饰时，只用that。
4、先行词为序数词、数词、形容词最高级时，只用that。
5、先行词既有人，又有物时。
扩展资料：
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。
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第1个回答 推荐于2016-12-01
是不是说非限制性定语从句？
比如说：
Charles Smith, who was my former teacher, retired last year.
查理·史密斯去年退休了，他曾经是我的老师。
My house, which I bought last year, has got a lovely garden.
我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching.
这本小说很动人，我已经读了三遍。
以上三个句子都是非限制性定语从句，主要特征就是逗号，然后which或who之类的，不能用that。
像这句话：This is the house which we bought last month.
这是限制性定语从句，这里的which就可以改用that~本回答被提问者采纳
比如说：
Charles Smith, who was my former teacher, retired last year.
查理·史密斯去年退休了，他曾经是我的老师。
My house, which I bought last year, has got a lovely garden.
我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching.
这本小说很动人，我已经读了三遍。
以上三个句子都是非限制性定语从句，主要特征就是逗号，然后which或who之类的，不能用that。
像这句话：This is the house which we bought last month.
这是限制性定语从句，这里的which就可以改用that~本回答被提问者采纳
第2个回答 2009-07-27
非限制性定语从句
定于从句里 有几种情况是一定要用THAT的 别的情况that 与 which相同 但非限制性定语从句只能用WHICH 具体如下
（十）关系代词that 的用法
(1)不用that的情况
(a) 在引导非限定性定语从句时。
(错)The tree, that is four hundred years old, Is very famous here.
(b) 介词后不能用。
We depend on the land from which we get our food.
We depend on the land that/which we get our food from.
(2) 只能用that作为定语从句的关系代词的情况
(a) 在there be 句型中，只用that，不用which。
(b) 在不定代词，如：anything, nothing, the one, all, much, few, any, little等作先行词时，只用that，不用which。
(c) 先行词有the only, the very,the same,the last,just修饰时，只用that。
(d) 先行词为序数词、数词、形容词最高级时，只用that。.
(e) 先行词既有人，又有物时。
(f) 先行词指物，在主句中作表语时．
(g) 为了避免重复．
(h)先行词是the way时
举例：
Is this the book that you borrowed in the library?
这是你在图书馆借的那本书吗？
Who that break the window should be punished．
谁打碎了窗户都要受到惩罚．
All that is needed is a supply of oil.
所需的只是供油问题。
Finally, the their handed everything that he had stolen to the police.
那贼最终把偷的全部东西交给了警察。
定于从句里 有几种情况是一定要用THAT的 别的情况that 与 which相同 但非限制性定语从句只能用WHICH 具体如下
（十）关系代词that 的用法
(1)不用that的情况
(a) 在引导非限定性定语从句时。
(错)The tree, that is four hundred years old, Is very famous here.
(b) 介词后不能用。
We depend on the land from which we get our food.
We depend on the land that/which we get our food from.
(2) 只能用that作为定语从句的关系代词的情况
(a) 在there be 句型中，只用that，不用which。
(b) 在不定代词，如：anything, nothing, the one, all, much, few, any, little等作先行词时，只用that，不用which。
(c) 先行词有the only, the very,the same,the last,just修饰时，只用that。
(d) 先行词为序数词、数词、形容词最高级时，只用that。.
(e) 先行词既有人，又有物时。
(f) 先行词指物，在主句中作表语时．
(g) 为了避免重复．
(h)先行词是the way时
举例：
Is this the book that you borrowed in the library?
这是你在图书馆借的那本书吗？
Who that break the window should be punished．
谁打碎了窗户都要受到惩罚．
All that is needed is a supply of oil.
所需的只是供油问题。
Finally, the their handed everything that he had stolen to the police.
那贼最终把偷的全部东西交给了警察。
第3个回答 2009-07-27
只在名词性从句（特别是定于从句）中有这个规定，而其他句子中还是可以这样用的！
第4个回答 2009-07-27
非限制性定语从句
.... ,which.... 中间用逗号隔开，只能用which。
.... ,which.... 中间用逗号隔开，只能用which。