As引导从句归纳总结.doc

As引导从句归纳总结一、 as引导定语从句一）as引导限制性定语从句主要结构有：the sameasasassuchassoas主句中出现the same, as, such, so修饰先行词，需选择as做关系代词在定语从句中做主语或宾语。1. Its the same person as we wanted to find yesterday .我们昨天要找的是同一个人。2. Such girls as he knows are good at English .他所认识的女孩都擅长英语。3. Do you have such books as we like ?你有我们喜欢那种书吗？4. She will marry as healthy a man as she can find .她将嫁给她能找到的任何一个有钱人。5. There is so warm a house as we want to live in .这里有如此暖和的房子，我们都想住在里面。6. He has so difficult a problem , as none of us can solve .他有如此难的一个问题，我们没有人能解决。二）引导非限制性定语从句1. as引导非限制性定语从句，指代整个主句内容，从句可置于句首，句中或句尾1) As everyone knows ,China is a beautiful country with a long history .每个人都知道，中国是一个有着悠久历史的美丽国家。2) The earth , as we know , moves round the sun .地球，我们都知道，围着太阳转。3) Tom works hard and is willing to help others, as we all know.汤母工作努力，并且乐于助人，这一点我们都知道。2. 非限制性定语从句中的谓语为被动式时，常用as做主语be said/known/announced/reportedbe mentioned/expected/discussed1) Grammar , as has been said before, is not a set of dead rules.语法，就像以前所说，不是一套死规则。2) As is known to all, Taiwan is part of China .3) As is illustrated in the picture，one drop of water does not make a sea；one tree does not make a forest；one person does not make a society.3. as引导非限制性定语从句，有“如，似，正像”的含义，因此，下列句式多用as1) as has been said above 如上所说2) as anybody can see正像每个人所看到的那样3) as we had expected正如我们所预料的那样4) Things are not always as they appear.事情并不一直像他们表面那样。5) The boy has as much progress as we had expected.正像我们所预料的那样，这个男孩取得了大的进步。二、as作从属连词用时，可以引导五种状语从句。现归纳如下：1. as表示“当的时候”，引导时间状语从句，多强调主句和从句中的动作或状态同时发生，从句可放在主句前，也可放在主句后。例如： As I waited at the stop， I heard a big noise. 当我在车站等车的时候，我听到一个很大的声响。 She rose up as he entered. 当他进来时，她站了起来。 2. as表示“因为”、“由于”，引导原因状语从句，其语气不如because强，通常为附加说明的理由，且是已知晓的原因，主句与从句没有逻辑上的因果关系。例如： As she was not well, I went there alone. 因为她身体不好，所以我独自到那里去了。 As he is a tailor, he knows what to do with this material. 由于他是个裁缝，他知道怎样利用这块布料。 3. as表示“虽然但是”，引导让步状语从句，从句通常用倒装语序，把从句的表语、状语或动词原形放在as前面，可以用though替代。例如： Child as he is, he knows a lot. 虽然他是个孩子，但他知道的东西很多。 Hard as it was raining， they went on working in the field. 虽然天下大雨，但他们继续在田地里干活。 4. as表示“按照”、“依照”、“像”，引导方式状语从句，从句置于主句之后。例如： You should do as the teacher tells you.你应当依照老师所说的去做。 The absence of air also explains why the stars do not seem to twinkle in space as they do from the earth. 空气的不存在，也说明了为什么在空中星星看来并不闪烁，而不像从地球上看的那样。 5. as表示“像一样”，引导比较状语从句，对主句和从句的动作或状态加以比较，说明它们之间有相似之处，在从句中常省略与主句相同的部分