[语法初识]

原句感知 自主探究 ① Xie Lei, who is 21 years old, has come to our university to study for a business qualification.

② She is halfway through the preparation year, which most foreign students complete before applying for a degree course.

③"You have to get used to a whole new way of life, which can take up all your concentration in the beginning, "explained Xie Lei, who had lived all her life in the same city in China.

④Living with host families, in which there may be other college students, gives her the chance to learn more about the new culture.

⑤New Concept English is intended for foreign students, which is known to us all. (1)通过观察以上句子，我们发现非限制性定语从句在意义上只是一个附加修饰语，对先行词或主句作些附加的说明。如果去掉，主句的意思仍然清楚。书写时往往用逗号与先行词分开。译成汉语时，从句常译成一个句子。

(2)在句④中，关系代词which前使用了介词in；选用介词in的原因是由先行词families决定的。

(3)在句②中，which引导非限制性定语从句，指代主句的一部分the preparation year；在句③、⑤中，which指代整个主句的内容。 　　

　　[语法剖析]

语法点一 引导非限制性定语从句的关系词 　　

关系词 先行词 在定语从句

中作的成分 关系

代词 who 人 主语 whom 人 宾语 which 物/整个主句的意思 主语/宾语 whose(＝of

whom或of

which) 人/物 定语