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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,As is often the case,这是常有的事,As is known to us all,，众所周知,As is said/mentioned above,As often happens,正如经常发生的那样,as,用在非限制性定语从句中,有“正如,” “,正像,”,之意。,As has been pointed out,正如已指出的那样,As we all know, body language sometimes is the key to successful communication.,as和which的差别,as 引导的从句位置灵活，多放句首，并有逗号隔开， which一般多放主句后面（见报纸）,as,用在固定结构中,如：,the sameas,像,一样的,suchas,asas,soas,I use the textbook.,You use the same kind of text book, too.,I use the,same,textbook,as,you do.,= I use the textbook just like the one,that,you do.,the same as,和,一样的,I stay in this classroom. You all stay in this classroom too.,I stay in the,same,classroom,as,you all do.,她和我坐在同一排。,这是一本年轻人都喜欢,的,书。,This is,such a book as,all young people like.,这是一本如此有趣的书,以至于,年轻人都喜欢。,This is,such,an interesting book,that,all young people like,it,.,试比较：,There is,so warm a house as,we want to live in.,这里有如此暖的房子，我们都想住在里面。,soas,如此的,他有如此难的一个问题，我们没有人能解决。,He has,so,difficult a problem, as,none of us can solve,.,Simon accepted,as much advice as Mr Yang gave to him,.,asas,像,.,一样,.,总结,非限制性定语从句,应注意以下几点：,一、非限制性定语从句通常不能用,that,引导。,1. I like the book,which was bought,yesterday,.,我喜欢这本书，这是昨天买的。,2. I like the book,which/that was bought,yesterday,.,我喜欢昨天买的那本书。,二、非限制性定语从句不能用,why,引导,要用,for which,代替,why,。,1. I had told them the reason,for which I,didnt attend the meeting,.,我已经把理由告诉了他们，为此我没有,去开会。,2. I had told them the reason,why I didnt,attend the meeting,.,我告诉了他们我不去开会的理由。,(,限制性定语从句“,the reason why .”,是常见搭配。,),三、非限制性定语从句置于句首时，不,能用,which,引导。关系代词,as,引导非,限制性定语从句位置比较灵活，可以,放主句前，也可以放主句后。,1. As I expected,he didnt believe me,.,正如我所预料的，他不相信我。,2. She heard a terrible noise,which brought,her heart into her mouth,.,她听到一个可怕的声音，这让她把心都,提到嗓子眼了。,四、在非限制性定语从句中，指人的关,系代词作宾语时，只能用宾格,whom;,不能用,who,替换，也不能省略。,1. Do you know Tom,whom we talked about,?,你认识汤姆吗,?,我们谈到过他。,2. This book,which you can get at any,bookshop, will give you all the information,you need.,这本书会给你提供所有你需要的资料，,它在任何一家书店都能买到。,(,非限制性定语从句中引导词在从句中作宾语，无论指人还是指物都不能省略。,),五、,which,可指前面整个句子。,The sun sends out light and heat,which,makes it possible for living things to exist,on the earth,.,太阳发出光和热，这使得生物能够在地球,上生存。,which,可代替句子,用于非限制性定语从句。,that,不能用于非限制性定语从句。,
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