定語從句what的用法
定語從句中能不能用what?如果可以，那么大家知道怎么用？下面是小編為大家整理的定語從句what的用法，希望能夠幫助到大家。
what是不能引導定語從句的.that可以引導定語從句.
what只能用來引導名詞性從句,比如主語從句,如：What he said was not ture.（他說的不是真的.） 或者賓語從句,如：I don't believe what he said.（我不相信他說的話.）而定語從句屬于形容詞從句.
（that可以引導的從句類型較多,只回答在定語從句中的用法.）
that作為關系代詞,引導定語從句,修飾其先行詞.如：All that glitters is not gold.（發光的不都是金子）定語從句that glitters修飾先行詞all,起形容詞作用,所以定語從句屬于形容詞從句.在這句話中,that其實是代替了先行詞all,在從句中作glitter的主語.
that也可以在從句中作賓語,有時可以省略掉,如：The car (that) I hired broke down after five kilometers.(我租來的車五公里后就拋錨了.）that替代car,在從句that I hired中作hire的賓語.
你可以比較以下一組句子.
What I said is true.我說的是實話.（what引導名詞從句,在句中作主語,what前沒有任何東西）
All that I said is true.我說的一切是實話.（that引導定語從句,在句中作定語,all是先行詞,that I said修飾all）
定語從句中能不能用what?
定語從句（Attributive Clauses）在句中做定語,修飾一個名詞或代詞,被修飾的`名詞,詞組或代詞即先行詞.定語從句通常出現在先行詞之后,由關系詞（關系代詞或關系副詞）引出.
關系代詞有：who,whom,whose,that,which等.
關系副詞有：when,where,why等.
關系代詞引導的定語從句
關系代詞所代替的先行詞是人或物的名詞或代詞,并在句中充當主語、賓語、定語等成分.關系代詞在定語從句中作主語時,從句謂語動詞的人稱和數要和先行詞保持一致.
1）who,whom,that
這些詞代替的先行詞是人的名詞或代詞,在從句中所起作用如下：
Is he the man who/that wants to see you?
他就是你想見的人嗎?（who/that在從句中作主語）
He is the man whom/ that I saw yesterday.
他就是我昨天見的那個人.（whom/that在從句中作賓語）
2) Whose 用來指人或物,(只用作定語,若指物,它還可以同of which互換）,例如：
They rushed over to help the man whose car had broken down.那人車壞了,大家都跑過去幫忙.
Please pass me the book whose (of which) cover is green.請遞給我那本綠皮的書.
3）which,that
它們所代替的先行詞是事物的名詞或代詞,在從句中可作主語、賓語等,例如：
A prosperity which / that had never been seen before appears in the countryside.農村出現了前所未有的繁榮.（which / that在句中作賓語）
The package (which / that) you are carrying is about to come unwrapped.你拿的包快散了.(which/that在句中作賓語）
關系副詞引導的定語從句
關系副詞可代替的先行詞是時間、地點或理由的名詞,在從句中作狀語.
1）when,where,why
關系副詞when,where,why的含義相當于"介詞+ which"結構,因此常常和"介詞+ which"結構交替使用,例如：
There are occasions when (on which) one must yield.任何人都有不得不屈服的時候.
Beijing is the place where (in which) I was born.北京是我的出生地.
Is this the reason why (for which) he refused our offer?這就是他拒絕我們幫助他的理由嗎?
2）that代替關系副詞
that可以用于表示時間、地點、方式、理由的名詞后取代when,where,why和"介詞+ which"引導的定語從句,在口語中that常被省略,例如：
His father died the year (that / when / in which) he was born.他父親在他出生那年逝世了.
He is unlikely to find the place (that / where / in which) he lived forty years ago.他不大可能找到他四十年前居住過的地方.
1）what = the thing which；whatever = anything
What you want has been sent here.
Whatever you want makes no difference to me.
2) who= the person that whoever= anyone who
（錯）Who breaks the law will be punished.
（錯）Whoever robbed the bank is not clear.
（對）Whoever breaks the law will be punished.
（對）Who robbed the bank is not clear.
3) that 和 what
當that引導定語從句時 ，通常用作關系代詞，而引導名詞性從句時，是個不充當任何成分的連接詞。賓語從句和表語從句中的that常可省略。What只能引導名詞性從 句， 用作連接代詞，作從句的具體成分，且不能省略。
I think (that) you will like the stamps.
What we need is more practice.
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