高中英语人教版选修6Unit5thepowerofnaturegrammar教案（系列一）.docVIP

Unit 5 The power of nature Grammar—the －ing Form 教案 Teaching aims Enable the students to master the v-ing form used as an adverbial Teaching important difficult points How to enable the students to know v-ing form used as an adverbial Teaching aids tape recorder, slides Teaching procedures Step1 Lead in Examine the sentences below and tell the similarity and difference between these two sentences. Looking carefully at the ground, I made my way to the edge of the crater. Having experienced quite a few earthquakes in Hawaii already, I didn’t take my notice. The –ing form can be used as an adverbial in a sentence to give information about time, reasons or results. We use the construction having+past participle to refer to an action that took place before the time expressed by the main verb. Grammar–ing 形式作状语 一、ing形式作状语,可以表示时间、原因、结果、条件、让步、行为方式、伴随状况等。 用法 例句 时间 Crossing the road, he was ran over by a car. Having done their homework, the students played football. 原因 Not knowing English, he couldnt understand the film. Having lived in Shanghai, he knows the place very well. 条件 Working hard, you will do well in the exam. Turning to the left, you will see the post office. 让步 Working or reading, she always did her best. Not being a rich man himself, he helped the poor generously. 伴随 The children went into the classroom, talking and laughing. She sat there, staring at the ceiling. 结果 His parents died in the war, leaving him an orphan. The child fell, striking his head against the door and cutting it. 二、 –ing形式的完成式 句型 主动 Having +p.p. …, 主语+谓语 被动 (Having been) +p.p…, 主语+谓语 用法 -ing完成式所表示的动作发生在句中谓语动词所表示的动作之前，一般在句中作时间或原因状语用被动语态-ing完成式所表示的动作发生在谓语动词所表示的动作之前，在句中一般作状语用 例句 Having answered the letter, she went on to read an English novel. Having been shown the lab, we were taken to see the library. 三、学习-ing形式作状语的用法时,需要注意以下四点: 一、与过去分词作状语的区别。? 一般来说,-ing形式表示主动、进行;过去分词表示被动、完成。试比较: The?enemy?fled?in?a?panic,?leaving?behind?a?lot?of?dead?bodies?and?weapons. Defeated?and?frightene