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從句大學(xué)英語(yǔ)四六級(jí)考試常考語(yǔ)法
I定語(yǔ)從句
1．先行詞為all， anything， something， nothing， everything， much， little， none等不定代詞時(shí)，關(guān)系代詞一般只用that，不用which。在大多數(shù)情況下that可以省略．
Please tell me everything （that） you know about the matter.
That’s all （that） we can do at the moment.
2．a(chǎn)s引出的限制性定語(yǔ)從句
在such … as的結(jié)構(gòu)中as可作關(guān)系代詞，引出限制性定語(yǔ)從句。有時(shí)和same連用，在從句中可作主語(yǔ)、賓語(yǔ)或表語(yǔ)等。
Such people as were recommended by him were reliable.
I’ve never seen such a talented young man as he is.
I have the same trouble as you （have）。
3．a(chǎn)s引出的非限制性定語(yǔ)從句
as可作關(guān)系代詞引出非限制性定語(yǔ)從句，代替整個(gè)主句，通常譯為“（正）如…一樣”，“（正）象…一樣”等。as引導(dǎo)的從句一般用逗號(hào)與主句隔開(kāi)，可以位于主句的前面、中間或后面．
I live a long way from work， as you know.
She did not， as her friend had feared， break down.
As is generally accepted， economic growth is determined by the smooth development of production.
4．分隔式定語(yǔ)從句
定語(yǔ)從句一般緊跟在先行詞之后，但有時(shí)會(huì)被其他句子成分與先行詞隔開(kāi)，從而構(gòu)成分隔式定語(yǔ)從句。
The days are gone when power politics worked.
A new teacher will come tomorrow who will teach you French.
5．介詞+關(guān)系代詞（which/whom等）引出的定語(yǔ)從句
如果關(guān)系代詞（which/whom等）在定語(yǔ)從句中作介詞的賓語(yǔ)，那么這個(gè)介詞可以提到從句前，構(gòu)成“介詞+關(guān)系代詞（which/whom等）+定語(yǔ)從句”。在這種結(jié)構(gòu)中關(guān)系代詞不可以用that。
This is a subject about which we might argue for a long while.
The four travelers with whom I shared the room were pleasant people.
6．關(guān)系代詞在限制性定語(yǔ)從句中常可以省略，一般有以下幾種情況：
1） 關(guān)系代詞在從句中作直接賓語(yǔ)時(shí)，在大多數(shù)情況下可以省略。
This is something （that） you must always keep in mind.
The man （whom） you just met is our manager.
關(guān)系代詞作介詞賓語(yǔ)時(shí)，介詞位于句尾時(shí)關(guān)系代詞可以省略；介詞位于關(guān)系代詞之前時(shí)則關(guān)系代詞不能省略。
This is the room （which） Churchill was born in.
This is the room in which Churchill was born.（which不可省略）
2） 關(guān)系代詞作主語(yǔ)時(shí)一般不能省略，但如果關(guān)系代詞在由there … be存在句構(gòu)成的定語(yǔ)從句中作主語(yǔ)時(shí)常可省略。
This is the only book （that） there is on this subject.
The old professor made full use of the time （that） there was left to him to continue his research.
3） 在way后面的定語(yǔ)從句中in which或that通常省略。
That’s the way （that/in which） I look at it.
I don’t like the way （that/in which） you laugh at her.
7．非限制性定語(yǔ)從句
非限制性定語(yǔ)從句修飾先行詞或整個(gè)主句，起補(bǔ)充說(shuō)明的作用，如果省略掉，原句句意仍保持完整。非限制性定語(yǔ)從句要用逗號(hào)與主句隔開(kāi)，其引導(dǎo)詞不能用that。非限制性定語(yǔ)從句屬于正式語(yǔ)體。經(jīng)常考到的非限制性定語(yǔ)從句有以下三種。
1）由which、as引導(dǎo)的非限制性定語(yǔ)從句。which、as代表整個(gè)主句。
He said that he had never seen her before， which was not true.
China is still a developing country， which is known to all of us.
2）由 “介詞+關(guān)系代詞”引導(dǎo)的非限制性定語(yǔ)從句。
He sent her a letter， in which he said that he was sorry for what he had done to her.
He failed to pass the exam， because of which his parents scolded him.
4） 由 “數(shù)詞、代詞或名詞+of +關(guān)系代詞”引導(dǎo)的非限制性定語(yǔ)從句。
He had three sons， one of whom was my son’s classmate.
There are about twenty students in this course， most of whom are freshmen.
They are two different words， the spellings of which are easily confused.
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