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高中英语 Unit 5 The power of nature Section Ⅳ Grammar & Writing课件 新人教版选修_图文

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Section Ⅳ Grammar & Writing 探究 语法精要 动词的-ing形式在句中作状语 【语法感知】 课文原句填空 1.______________(collect) and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast. 答案: Having collected 2._________________(experience) quite a few earthquakes in Hawaii already,I didn’t take much notice. 答案: Having experienced 3.____________________(collect) special clothes from the observatory,we put them on before we went any closer. 答案: Having earlier collected 4 . __________________(study) volcanoes now for many years,I am still amazed at their beauty as well as their potential to cause great damage. 答案: Having studied 【语法知识储备】 1.动词的-ing形式的时态、语态及意义 动词 一般 时 doing 形式 意义 与句子主语构成逻辑上的主谓 关系,与谓语动作同时发生, 或基本上同时发生 与句子主语构成逻辑上的动宾 关系,且与谓语动作同时发生 主动式 doing 被动式 being done 以do 为例 主动式 与句子主语构成逻辑上的主谓 完成 having done 关系,先于谓语动作发生 时 被动式 having 与句子主语构成逻辑上的动宾 done having been 关系,且先于谓语动作发生 done Hearing the news,they immediately set off. 听到这个消息,他们立即出发了。 Having written a letter,I listened to music for a while. 写完信后,我听了一会儿音乐。 Having been held back by the traffic jam,she couldn’t get there on time. 她被交通阻塞耽搁了,无法准时到达那里。 2.现在分词作状语的种类 现在分词作状语时,表示的动作是主语动作的一部分,用 来修饰谓语动词,常表示动作发生的时间、原因、条件、结 果、方式、伴随、让步等情况,并可以转换成相应的状语从句 或并列句。 (1)作时间状语 Walking in the park,she saw an old friend. =When she was walking in the park,she saw an old friend. 在公园散步时,她看到一个老朋友。 Having finished the work,he went out to meet his friends. =After he finished the work,he went out to meet his friends. 完成工作后,他出去会朋友了。 如果强调两个动作同时发生,分词前可加when或while。 Be careful when crossing the street.过马路时一定要小心。 Don’t mention this while talking to him. 与他交谈时不要提这件事。 (2)作原因状语 Not knowing how to deal with the problem,he turned to his teacher for help. = As he didn’t know how to deal with the problem,he turned to his teacher for help. 由于不知道如何处理这个问题,他向老师求助。 Having traveled to many places,he knows a lot. =Since he has traveled to many places,he knows a lot. 经过很多地方旅游,他知道很多。 (3)作方式或伴随状语 He sent me an e-mail,hoping to get further information. = He sent me an e-mail , and (he) hoped to get further information.他给我发了封电子邮件,希望得到更多的消息。 (4)作条件状语 Working hard,you’ll surely succeed. =If you work hard,you’ll surely succeed. 如果你努力工作,你就会成功。 (5)作让步状语 Admitting what she has said,I don’t think that she has tried her best. =Though I admit what she has said,I don’t think that she has tried her best. 尽管承认她所说的话,但我认为她没有尽最大努力。 (6)作结果状语(必然结果) The train was caught in heavy snow,thus causing the delay. =The trai


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