定语从句中只用WHO,不用that的情况

1.

先行词是one, ones或anyone时;先行词为those 或被those修饰，指人时

One who does not work hard will never succeed.
Anyone who breaks the law should be punished.
She is the only one of the students who has been to the USA.

Those who learn not only from books but also through practice will succeed.

2.

在以there be…的句子中，先行词为人时

There is a comrade outside who wants to see you.

3.

当定语从句中又有定语从句,且先行项都为人时

The student that won the first prize is the monitor who works hard.

4.

当指人的先行项被一些指物的名词修饰时

There 's only one student in the school who I want to see.
Do you know the woman in blue with a baby on her back who is working in the fields?

5.

在非限制性定语从句中指人

I met a friend of mine in the street, who had just come from America.

6.

定语从句中有插入语时, 且先行项为人时

Jackson is a man who I believe is honest.

定语从句中只用THAT,不用which的情况

1.

当先行词是不定代词，如all, everything, anything, nothing, much, few, little, none, the one等

All THAT can be done has been done.
I didn't want this recorder; I want the one THAT was borrowed yesterday.

2.

先行词（指物的）前面有only, few, one of, little, no, all, every, very等词修饰时

There's no difficulty THAT we can't overcome.
I've read all the books THAT can be borrowed here.

This is the very man THAT I want to see.

3.

先行词被序数词first, last, next等或形容词的最高级修饰时

This is the first letter THAT I've written in English.
She is the most careful girl THAT I've ever known.

4.

当先行词既有人又有物时

They talked about the people and places THAT they had visited.

5.

当先行词是系动词be后面表语或关系词本身是从句的表语时

Shanghai isn't the city THAT it used to be 60 years ago.
He is no longer the man THAT he used to be.

6.

当主句是以who, which或what开头的特殊疑问句时

Who is the man THAT is waiting at the school gate?
Which is the car THAT ran over a dog yesterday?

What did you see THAT made you so angry?

7.

当主句以There be…结构开头时，或关系代词在there be…结构中作实义主语，先行项为物

There is a seat in the corner THAT is still free.
There are two books on history THAT are for you.
The 9.15 is the fastest train THAT there has ever been.

8.

.当先行词是基数词时

Yesterday I caught two fish and put them in a basin of water. Now you can see the two THAT are still alive.