非限定性定語從句是英語語法中從句的一種,是定語從句的分支之一。而關(guān)于非限定性定語從句的引導(dǎo)詞有哪些呢?

今天和小編一起重點(diǎn)來看看“介詞+關(guān)系代詞”引導(dǎo)的非限制性定語從句

首先,講講什么是非限制性定語從句?

非限定性定語從句起補(bǔ)充說明作用,缺少也不會影響全句的理解,它與主句往往用逗號隔開。

“介詞+關(guān)系代詞”引導(dǎo)的非限制性定語從句指的是:在介詞后引導(dǎo)非限制性定語從句。

關(guān)系代詞which有時(shí)并不代表主句中某一確定的詞,而是概括整個(gè)主句的意思。

介詞的選擇取決于它與先行詞的搭配或與從句中謂語動詞的搭配。

as it is known to all (that...) (as 做狀語從句連詞,是狀語從句, 可以加that)
與 as is known to all (as做主語,是定語從句)
與 it is known to all that... (主語從句,it是形式主語)

即:

As is widely known, the moon is closer to the us than the sun.(定從)
= That the moon is closer to the us than the sun is widely known.(主從)
= It is widely known that the moon is closer to the us than the sun.(主從)
As it is known to everyone, I thought you knew about it too.(狀從)

例句:

They were short of sticks to make frames for the climbing vines,without which the yield would be halved.
他們?nèi)贝钇咸鸭艿臈U兒,沒有它們產(chǎn)量會減少一半。

They thanked Tom,without whose support they would not have succeeded.
他們對湯姆表示了感謝,因?yàn)闆]有他的支持他們就不會成功。

These new neighbors,to whom I was introduced yesterday,have come here from Beijing.
這些鄰居是北京來的,昨天我被介紹同他們認(rèn)識了。

好了,以上就是“介詞+關(guān)系代詞”引導(dǎo)的非限制性定語從句的介紹,還請同學(xué)們在日常的學(xué)習(xí)中一定要勤加練習(xí),在具體的句子中加以理解,一切問題就可以迎刃而解了。