高中2019屆英語語法專題講義 冠詞
<3>先行詞為“there be”結構的主語時，例如
there is a man who wants to see you.
在本句子當中a man是there is a man 這句當中的主語，所以用who不用that2其中，that 和 which 都可以指物，它們在指物時的區別：
用that不用which
<1>先行詞前有形容詞最高級,序數詞,all, every, little, no, any, much, the only, the very, the last 等修飾時，例如：
i have read all the books that you gave me.
<2>先行詞為all, few, nothing, everything, little, much 等不定代詞時：
he did all that he could do to help us.
<3>主語以who或which開頭時
who is the man that just called you just now?
<4>關系代詞在從句中做表語時
china is not the country that is was.
<5>既指人又指物時
he talked about the teachers and schools that he had visited.2, 先行詞表示物時, 用which不用that 的情況
<1> 引導非限制性定語從句時,例如:
she heard a terrible noise, which brought her heart to her mouth.
<2>當關系代詞做介詞賓語時,例如:
he wrote a book in which he could learn about his life.
在上一例句中,引導詞 “which”作了介詞 “in”的賓語,所以不可以用 “that”代替.關于as1在一些結構，如“such …as” “the same…as” “as…as”等結構中，定語從句的引導 詞經常要用到as，例如
this is not such a book as i expected.
the same as和the same that 的區別。例句： this is the same tool as i used last time.
this is the same tool that i used last time.
在例句中，第一句的意思是這個工具和我上次用的一樣，但是第二句的意思是這就是我上次用的工具2 as 和which 的比較
相同點：兩者都可以引導非限制性定語從句，先行詞都可以是整個句子，都可以在從句中 做主語，賓語表語。 不同點: <1> as 引導的從句可以放在句首和句尾，而which 引導的從句只可放在句尾。 <2>as 還有正如、正象的意思。
as marx pointed out, labor created man himself.
當先行詞，雖然表示時間地點，但是引導詞在從句中不是做狀語，而是做賓語時，不能用when, where引導，而只能用that, which 等引導。比較以下兩個句字：
i will never forget the days when i first went to beijing .
i will never forget the days that (which) we spent together⑨ there is no such place ___ you dream of in all this world. (北京西城·5月) a. that b. what c. which d. as
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