发布网友 发布时间:2023-04-01 05:28
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热心网友 时间:2023-11-17 22:46
逗号后which常引导定语从句。which 指前句的整句内容,作为后从句的主语时,看作单数。非限定性定语从句的作用是对所修饰的成分作进一步说明,通常是引导词和先行词之间用逗号隔开,将从句拿掉后其他部分仍可成立;
1. which引导的非限定性定语从句来说明前面整个句子的`情况或主句的某一部分
2.当先行词是专有名词或物主代词和指示代词所修饰时,其后的定语从句通常是非*性的,例如:
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了,他曾经是我的老师。
My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching. 这本小说很动人,我已经读了三遍。
3.非*性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数,例如:
He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思,这使我心烦。
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽,这就叫做蒸发。
4. 有时as也可用作关系代词
5. 在非限定性定语从句中,不能用关系副词why和关系代词that,而用who, whom代表人,用which代表事物.;