職稱英語語法：定語從句的用法
導語：定語從句相當于形容詞，修飾名詞或代詞，在句中作定語。下面是小編為您收集整理的關于定語從句的用法，歡迎閱讀!
1、位置：定語從句置于被修飾詞之后
Those who are willing to attend the party, sign here please.
2、關系副詞when與where、why、that
when 指時間 = in / at / on / during which
where指地點 = in / at / from / which
why指原因 = for which
當先行詞為way、day、reason、time時，可用that作關系副詞。(非正式場合)
I don’t like the way that / in which / he talks.
當time作先行詞時，關系詞可以省掉。
This is the first time I have given you a lesson in French.
3、先行詞：被定語從句修飾的詞稱為先行詞
(1)先行詞一般是名詞和不定代詞，如:some-, any-, every-和no與-boy, -thing的合成詞;或all、none、any、some、that、those等代詞。數詞也可以作先行詞，人稱代詞也同樣可作先行詞。
(2)先行詞與關系詞是等量關系。必須注意兩點：
①先行詞在從句中作主語時，從句謂語動詞的數由先行詞而定。
This is the place which is worth visiting.
②關系詞在從句句子中充當了成分，其意思就是先行詞的意義，所以在從句中不能重復其意。
There are many places we can visit(them)in China.
4、關系詞：引導定語從句的`都稱關系詞
關系代詞：who, whom, which, that, whose, as。
關系副詞：when, where, why。that偶爾也作關系副詞。
5、確定關系詞的步驟
(1)先找關系詞，看先行詞指的是什么。
(2)看關系詞在從句中所充當的成分。
6、在定語從句中，當先行詞指物時，下列情況的關系詞宜用that而不用which
(1)先行詞被①形容詞最高級 ②序數詞 ③數詞幾種詞修飾或被 ④only、any、few、little、 no、all、one of等修飾時。
(2)先行詞為all、much、little、none、few、one、something、anything等不定代詞時。
(3)先行詞中既有人又有物時。
He was looking pleasantly at te children and parcels that filled his bus.
(4)先行詞在主句中作表語關系詞在從句中作表語時。
The village is no longer the one that was 5 years ago.
(5)當主句中含有疑問詞which時。
Which are the books that you bought for me ?
7、宜用which而不用that的情況
(1)在非限制性定語從句中
(2)在關系詞前有介詞時
(3)當先行詞本身是that時
(4)當關系詞離先行詞較遠時
8、關系詞who與that指人時，也有不同情況分別用不同的關系詞
(1)當主句是there be句型時，關系詞用who。
(2)先行詞是為anyone、those、someone、everyone、one等詞時，關系詞用who。
(3)當主句是who作疑問詞時，關系詞用that。
Who is that girl that is standing by the window?
(4)whom在從句中只作賓語，可被who取代。
9、whose作關系詞既指人又指物，在從句中作定語。如：
Do you know Mr.Smith whose story is very moving ?
There is a room, whose window faces the river.
There is a room, the window of which faces the river.
10、關系代詞as,在從句中作主語、賓語和表語。
(1)先行詞被such和the same修飾，或句型as many(much)中，從句都用as 引導。
Such books as you bought are useful.
The school is just the same as it was 10 years age.
注意：區別①such … that … 引導的結果狀語從句。They are such
lovely children that we love them much.②the same … that … 引導定語從句。I want to use the same tool that you used just now.
(2)無先行詞的定語從句用as和which引導。
區別：①意義上：as 含有“這點正如……一樣”。②位置上：as 從句可置句首，也可在另處。
He didn’t pass the exam, as we had expected.
There is lots of air in loose snow, which can keep the cold out.
As is known, the earth is round, not flat.
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