红富士苹果一个几克:关于定语从句

楼上的不全。

简单地说：

只能用that：
1、当先行词指物且是不定代词时；
2、当先行词是序数词最高级或先行词前面有序数词修饰时；
3、当先行词是形容词最高级或先行词前面有最高级修饰时；
4、当先行词中既有人又有物时；
5、当先行词是who、whom或which时；
6、当先行词在定语从句中做表语时；
不能用that：
1、当先行词指人且为people、those、ones、anyone等词时。
2、非限定性定语从句中不能用that；

因为你想要简练，我就不提供例句了，谢谢！

只能用that：

a. 序数词或最高级修饰先行词时，要用that，例如：

1) The first novel that I read was A Tale of Two Cities by Charles Dickens.

2) Li Hua is the most diligent student that I have ever known.

3) This is the best that can be done now.

b. 先行词为不定代词，如：all, much, something, everything, anything, nothing, none等。例如：

1) We should do all that is useful to the people.

2) Is there anything that you want to buy in town?

c. 先行词被the only, any, few, little, no, all, just, the very, the same 等词修饰时。例如：

1) The only thing that we could do was to wait.

2) That is the very word that is wrongly used.

d. 先行词既有人又有物，用which和who都不合适，这时宜用that。例如：

1) The writer and his novel that you have just talked about is really well known.

2) The bike and its rider that had run over an old woman were held up by the police.

不宜用that：

a. 当关系代词前有介词时：

1) Is this the room in which Mr. White lives?

2) A zoo is a park in which many kinds of animals are kept for exhibition.

b. 在非限制性定语从句中：

1) More and more people are beginning to learn English, which is becoming very popular in our country.

2) Crusoe’s dog, which was now very old, became ill and died.

先行词被the only, any, few, little, no, all, just, the very, the same 等词修饰时。
不能用that：
当先行词指人且为people、those、ones、anyone等词时。
非限定性定语从句中不能用that；