1、在定語從句中, which/whom前常加介詞引導定語從句

例 He likes the book very much , for which he became famous ten years ago.

他很喜歡這本書,10年前他因此書出了名。

例 He is a great scientist , from whom we learn a lot

他是一位偉大的科學家,從他身上我們學到了很多>

因介詞不能提前的情況:有些動詞短語比較固定,不宜分割,因此不能把介詞置于關系代詞之前。

如listen to, catch up with, take care of, hear of,be proud of , take part in , get along with, look forward to, make use of 等。

2、關系詞 whose, where,when前可加介詞

例 They respected the old man very much , with whose help they finished the work on schedule.

他們很尊敬這位老人,在他的幫助下他們接時完成了這項工作。

例 The boy climbed to the top of the tree , from where he could see the enemy in the distance.

這個男孩爬上了樹頂,從那里他可以看見遠處的敵人。

3、在 which/whom前還可用復合介詞

mos tof which , all of whom , neither of which , in front of which ,half of whom, in which case, during which time等都是“復合介詞+關系詞”結構。

例 He has two sons , neither of whom is interested in medicine.

他有兩個兒子,他們都對醫學不感興趣。

考點“短語介詞+關系代詞”引導定語從句時,若短語介詞是表示位置的,而且定語從句的謂語動詞是不及物的,定語從句往往用倒裝語序。

例 They will climb the mountain , at the foot of which lies a small village.

他們將要爬那座山,山腳下有個小村莊。

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