人教版高中英语配套课件：选修9 unit 4 period 1.pptVIP

【单项填空】 ________about the economic crisis that he decided to look for more information about it. A．So curious he was B．So curious was he C．Such curious he was D．Such curious was he 解析　so/such＋adj./adv.作表语或状语放在句首时，主谓倒装。 答案　B 2．Collecting “exotic” plants，as they are called，dates back to the earliest times.收集所谓“异国”植物，要追溯到很久以前。 (1)本句是一个复合句，as引导非限制性定语从句，句子的主语是collecting “exotic” plants，谓语是dates back to...。 (2)as引导限制性定语从句时，在从句中作主语、宾语、表语、状语等，常用的结构为：the same...as，such...as...等。as还可以代替整个句子的内容，并在从句中作主语、宾语、表语。此时，as引导的从句可放在句首、句中、句末，意思是“正如，就像”，常用的结构有：as you know，as anybody can see，as is known，as is said above，as it is等。 He was a foreigner，as I detected from his accent. 他是个外国人，我是从他的口音中听出来的。 Dont read such books as you dont understand. 不要读类似这些你不理解的书。 As is known to all，China is stronger and stronger. 众所周知，中国越来越强大。 1 as conj. ①引导时间状语从句，强调主、从句谓语动词的动作同时发生，与while相近，意为“当……的时候”。 As she sang，tears came down her cheeks. 她一边唱歌，一边流泪。 ②引导原因状语从句，相当于because，since，意为“因为，由于”。 As he is a qualified doctor，I trust his advice on medical matters.,因为他是一个合格的医生，所以在医疗上我相信他的建议。 【归纳拓展】 ③引导方式和比较状语从句，意为“按照；如，像”。 She stayed in bed as the doctor had ordered.,她依照医生的吩咐卧床休息。 The Christmas tree is almost as tall as the house.,这棵圣诞树几乎跟房子一样高。 ④引导让步状语从句，意为“尽管”。 Young as I am，I already know what career I want to follow.,尽管我很年轻，但我早就知道我想从事什么职业。 2 as prep.作为；如同；当某人是……某身份时She spoke of me as her dearest friend. 她谈起我如同她最亲密的朋友似的。 【比较网站】 which/as；as/with；as/like 关系代词which引导非限制性定语从句时，可以代替整个主句的内容，但从句不能在句首，只能在主句之后；as引导非限制性定语从句，既可放在主句前，又可放在主句后。 The boy didnt come back that night，which worried his parents much. 这个男孩那天晚上没有回来，这使得他父母很担心。 As has been said，Wang has been married to Li. 正如人们所说，王和李结婚了。 as表示“随着”时，是连词，引导时间状语从句，而with表示“随着”时，是介词，不引导句子。 As time went on，he grew clever and clever. ＝With time going on，he grew clever and clever. 随着时间的推移，他越来越聪明了。 as prep.多用于正式场合；like常用于look like，feel like，sound like，like this/that等。 Let me speak to you as a father. 让我作为一个父亲跟你说话。 Let me speak to you like a father. 让我像一位父亲那样跟你说话。 As a b