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1、Unit 2 The Environment Grammar教学案 4时第周周月日年月日上课时间备课人间班级节次课Unit 2 The Environment Grammar总课时数第节题目 1. Consolidate the content which was learned in the last lesson.2. Enable the students to use the present participle correctly.标重How to change adverbial clause into verb-ing as an adverbial in different s
2、ituations.难点参考The agreement of the subject of the main and clause sentences.Textbook, reference book方Discussion and consolidation多 媒 体不用教学辅助手段专用教室不用法教学二次备课Step1. RevisionHelp the students to review the content learned in the lastlesson.教 Step2. Pay attention to following point:非谓语动词作状语的句型结构注意的问题。学非谓
3、语动词作状语时，一是它相当于一个状语从过 句，二是它逻辑上的主语必须和句子的主语一致。程 1. Finding her car stolen, D.A. a policeman was asked to help设B. the area was searched thoroughly计 C. it was looked for everywhereD. she hurried to a policeman for help2. C to the train station, the train had left.A. When gettingB.GettingC. When I gotD. H
4、aving gotStep3. Consolidation1.Choose the correct sentence:Ask students to choose the right answer according to the rule above.Key: 1. b2. a3. b4. b用分词短语改写下列句子：1） Because he was ill, he can t go to work today.Being ill, she can t go to work today.2) As soon as I saw him, I told him about the good ne
5、ws.Review the contentwith the aid of theteacher.Try to understand thispoint carefully.Point out the reasonsfor your answer.Do this part bythemselves.Find out the relationbetween the present教学二次备课Seeing him, I told him about the good news.participle and the3）Having talked for two hours , she fell asl
6、eep.subject.教4）They lay on the grass, looking at the sky.学5）Working hard , you will pass the exam.6 ） Heavy smoke goes into the sky, making us sick. 过 7) The man reading newspapers is my father.程Choose the right answer:Do this part设Key: 8-12: B, B, A. B. Bindividually, then13-17: A, C, D, B,B18-20:
7、B, D, Ccheck the answers.计补充解释：（关于 -ing 作状语的情况）1.作时间状语 .-ing 短语作时间状语一般置于句首。如：Hearing the bad news, they couldn t help crying.Try to understand2.作原因状语 -ing 短语作原因状语一般置于句首。如： these rules and keepBeing so angry, he couldn t go to sleep.them in mind.3. 作条件状语 -ing 作条件状语置于句首或句末。如：Working hard, you will suc
8、ceed.如果你勤奋一点， 你就会成功。 注意：_, andyou will succeed.4.作让步状语 -ing短语作让步状语，可置于句首或句末，常与even if, though连用。5.作伴随状语eg. They came into the classroom, singingand laughing.小结：-ing 短语与 when, while, though, even if, until, if等连词连用时，相当于这些连词引导的一个从句。课外Preview the content in this part and try to learn these rules by heart.作业教学小结