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1、【精品文档】如有侵权,请联系网站删除,仅供学习与交流限制性定语从句与非限制性定语从句.精品文档.限制性定语从句与非限制性定语从句1 限制性定语从句与非限制性定语从句的比较限制性定语从句非限制性定语从句和先行词的关系密切(删除之后影响整个句子的表达)和先行词关系不密切(是一种补充说明,删除后不影响这个句子意思的表达)不用逗号分开一般用逗号分开可用关系代词that引导不可用关系代词引导That,who,which等关系代词在从句中当宾语时可以省略关系代词不可以省略可以代替(whom做宾语时,可用who或that替代)不能代替只可以修饰先行词,不可以修饰主句或主句的一部分修饰整个主句或主句的一部分,
2、此时定语从句有逗号分开。2 关系代词which与as引导非限制性定语从句的区别。(1) which与as都可以引导非限制性定语从句,which引导定语从句要置于先行词后面,而as引导的定语从句位置相对灵活,可放在句首,也可以放在句后eg.正像他所意识到的那样,我对他非常有用As he realized, I was very useful to him.空气,众所周知,是一种气体Air, as we know, is a gas.他是个外国人,正像我从他口音判断的那样。He was a foreigner, as I know form his accent.他又来晚了,这一点使老板很生气He
3、 came late again, which made his boss angry.(2)当定语从句位于主句后面,纯粹表示主句所述的内容,往往用which;当定语从句中有“如同那样”的含义时,用as比用which更常见。Eg.妈妈老把我当成小孩对待,让我无法忍受Mummy always treats me just like a baby, which I cant bear.事与愿违,这是常有的事Things will turn out contrary to ones wishes, as is often the case.(3)“介词+关系代词”结构的定语从句,必须用which,不
4、能用as.Eg.我们周围有很多氧气,没有他们我们无法生存There is a great deal of oxygen around us, without which we could not live.3引导限制性定语从句时which与as的区别定语从句前面有such, as, the same 时,引导定语从句的关系代词用as,不用which.Eg 所需要的字典有许多都有了There are as many dictionaries as needed.他讲的那些故事我从没听过I have never heard such stories as he tells.我们正面临着和多年以前同样的困境We are facing the same problems as we did years ago.