標籤:從句引導詞

引導詞是英語語法中的名詞。引導詞就是引導從句的詞,比如whether,how,what ,why,when等具有引導其後從句功能的詞。

1定語從句

定語從句的引導詞有關係代詞who, whom,whose,which,that, as;關係副詞when, where,why。

2應用

as
引導詞as可引導限制性定語從句,也可引導非限制性定語從句。
1.在固定片語the same...as,such...as中,as引導限制性定語從句。如:
He is not such a fool as he looks.
I've bought the same dress as she is wearing.
2.當先行詞是整個主句時,可用 as /which引導非限制性定語從句。引導詞as和which的區別在於:
①as引導的非限制性定語從句可放於主句前、主句中、主句后,而which引導的非限制性定語從句一般放於主句后或句中。
②as常與從句中的know,see, hear,expect等動詞連用,也常用於as often happens,as is often the case(常有的事)等句子中;而which一般不用於以上情況。
③as有「正如」的含義,which沒有此含義。如:
As is well known,Shanghai is a big city.
Some of the roads were flooded, which made our journey more difficult.
互換規則
先行詞是物時,其引導詞可用 which也可用that,通常情況下二者可互換,但在有些情況下不能。
1.用which不用that引導定語從句的三種情況:
①在引導非限定性定語從句時,和在介詞后不能用that,應用which。如:
Football,which is a very interesting game,is played all over the world.
②先行詞為that時,為了避免重複,定語從句用which不用that引導。
如:That which you borrowed from me wasn't a real diamond necklace.
③介詞後用which不用that引導。如:
The method with which you solved the problem is very good.
2.用that不用which的七種情況:
①先行詞前有形容詞最高級或序數詞修飾時,用 that不用which引導。如:
This is the best place that I have ever visited.
The second question that is asked is why we don't fall off the earth.
②先行詞為little,much,all,none,few,(the)one, something,everything,nothing,anything等不定代詞時,用that引導。如:
There is nothing in the world that can frighten him.
③先行詞既有指人的名詞又有指物的名詞時,用 that引導。如:
He told us about the people and the cities that he had visited.
④先行詞前有any,all,no,few,every,some,little, much,(the)very,(the)only,(the)last等詞修飾時,用 that引導。如:
This is the very coat that I need.
Is oxygen the only gas that helps fire burn?
⑤先行詞為which時,為了避免重複,用that引導。如:
Which is the book that you bought yesterday?
⑥先行詞在從句中作表語時,常用that引導。如:
Shanghai is no longer the city that it used to be in the 1930's.
⑦當主句是There be...句型時,用that引導。
There are two tickets for the film that are for you two.

結構

在「one of+複數名詞+定語從句」結構中,從句的謂語動詞應與複數名詞保持一致;當one前有the only修飾時,從句的謂語動詞應與the only one保持一致。如:
He was one of the students who were late for class.
He was the only one of the students who was late for class.
六、引導詞前有介詞或短語介詞時,修飾人只能用 whom,修飾物只能用which引導,如:
My glasses,without which I was like a blind man, fell to the ground and broke.
The man,by whom the wolf was shot,is called Jackson.
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