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名词性从句的what和who的用法?

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名词性从句的what和who的用法?
what可以在名词性从句做主语和宾语是指物吗?who在名词性从句做主语和宾语是指人吗?
名词性从句的what和who的用法?
what引导名词性从句的五种用法
一、用法归纳
1.表示“……的东西或事情”:
They’ve done what they can to help her.他们已经尽力帮助了她.
He saves what he earns.他赚多少,积蓄多少.
What Mary is is the secretary.玛丽的职务是秘书.
2.表示“……的人或的样子”:
He is no longer what he was.他已经不是以前的那个样子.
He is what is generally called a traitor.他就是人们通常所说的叛徒.
Who is it that has made Fred what he is now?是谁把弗雷德培养成现在这个样子的?
3.表示“……的数量或数目”:
Our income is now double what it was ten years ago.我们现在的收入是10年前的两倍.
The number of the students in our school is ten times what it was before liberation.现在我校学生的数量是解放前的10倍.
4.表示“……的时间”:
After what seemed like hours he came out with a bitter smile.似乎过了几个小时他才苦笑着出来.
The young girl was too frightened to speak,standing there for what seemed like hours.小女孩吓得不敢说话,在那儿站了几个小时.
5.表示“……的地方”:
This is what they call Salt Lake City.这就是他们称为盐湖城的地方.
In 1492,Columbus reached what is now called America.1492年哥伦布到达了现在所称的美洲大陆.
二、用法说明
(1) 这样用的what相当于“先行词+关系代词”,所以其前不能有先行词:
你喜欢什么就拿什么吧.
正:You can have what you like./ You can have everything (that) you like.
误:You can have everything what you like.
(2) 有时what 可用作限定词,其后修饰一个名词:
I gave him what books I had.我把我所有的书都给他了.
He gave me what money he had about him.他把身边带有的钱全给了我.
(3) What 后的名词可以是复数名词或不可数名词,但通常不能是单数可数名词:
误:I gave him what book I had.
(4) What后接不可数名词时,有时可有little修饰.注意区别:what+不可数名词=所有的都,what little+不可数名词=虽少但全部.如:
I spent what time I had with her.我所有的时间都是与她一起度过的.
I spent what little time I had with her.我仅有的一点时间都是与她一起度过的.
who在名词性从句做主语和宾语都是指人.
如:
who he is dosen't matter..