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1、主要结构有：主要结构有：the sameas , asas , suchas , soas主句中出现主句中出现the same, as, such, so修饰先行词，用修饰先行词，用as作作主语或宾语。主语或宾语。eg: Its the same person as we wanted to find yesterday .我们昨天要找的是同一个人。我们昨天要找的是同一个人。 Do you have such books as we like ?你有我们喜欢那种书吗？你有我们喜欢那种书吗？二、引导非限制性定语从句二、引导非限制性定语从句as引导非限制性定语从句，指代整个主句内容，从句可置于引导
2、非限制性定语从句，指代整个主句内容，从句可置于句首，句中或句尾句首，句中或句尾eg: 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。每个人都知道，中国是一个有着悠久历史的美丽国家。The earth , as we know , moves round the sun .地球，我们都知道，围着太阳转。地球，我们都知道，围着太阳转。 Tom is willing to help others, as we all know.汤姆乐于助人，这一点我们都知道。
3、汤姆乐于助人，这一点我们都知道。 三三 as与与which引导非限制性定语从句的异同引导非限制性定语从句的异同 1.相同：相同：都可以指代前面一个词或整个句子，都可以指代前面一个词或整个句子，并在从句中充当一定的成分并在从句中充当一定的成分eg: I passed the exam, which made me very excided. Taiwan belongs to China, as is known to us all. 2. 异：异：位置差异位置差异 which引导的从句只能放在主句之后引导的从句只能放在主句之后; as 引导的从句可放在主句前，后或插在主语和谓语之间引导的从句可
4、放在主句前，后或插在主语和谓语之间 意义差异意义差异 which在句中翻译为：这在句中翻译为：这. ; as翻译为：正如，翻译为：正如，正像正像 eg: Some of the roads were flooded, which made our journey more difficult As is known to us all, Taiwan belongs to China. Taiwan, as is known to us all, belongs to China.eg: As we all know, the earth is round. Mike, as we expec
5、ted, attended the meeting. He is an very honest man, as we all believe. As is known to all, Taiwan is part of China. As is often the case with young people, he is overconfidence.1._ is reported in the newspaper, talks between the two countries are making progress.2.His plan was such a good one _ we all agreed to accept.3.6.He worked hard, _ made him pass the exam. Practice ASaswhich