Section_ⅣGrammar_&_Writing

非限制性定语从句

　　一、非限制性定语从句的概念

　　非限制性定语从句的作用是对所修饰的成分做进一步说明，通常和主句间用逗号隔开。

　　He often comes to school late, which makes his teacher angry.

　　他经常上课迟到，这使得他的老师很生气。

　　She eats too much, which makes her heavier and heavier.

　　她吃得太多，这使她越来越胖。

　　二、引导非限制性定语从句的关系代词有 as, which, whom, who, whose；关系副词有 when, where 等

　　Guo Ailun, as you know, is an excellent basketball player.

　　你知道，郭艾伦是一名优秀的篮球运动员。

　　Mr Smith, whose foot was badly hurt, was quickly sent to the local hospital.

　　史密斯先生的脚受了重伤，很快就被送到了当地医院。

　　We'll graduate in July, when we will be free.

　　我们将于七月份毕业，到那时我们就自由了。

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　　①(北京高考改编)I borrowed the book Sherlock Holmes from the library last week, which my classmates recommended to me.

　　②(四川高考改编)Until now, we have raised 50,000 pounds for the poor children, which_is quite unexpected.

　　③(天津高考改编)We have launched another man­made satellite, which_is announced in today's newspaper.

④(浙江高考改编)Ellen was a painter of birds and of nature, who,_for some reason, had withdrawn from all human society.