(
课件网) 动词-ing形式（一） V-ing作主语 Smoking, Parking, Spitting, Littering… Have you ever seen these signs -ing forms Step 1:Lead in (创设情境) Step2：Self-study (自主学习) （5min） 语法体会：完成下列二个任务并作出小结。(导学案) Task1: 1. _____ (sing) is their hobby. 2. _____(do) exercise is the best way to lose weight. 3. _____(fly) like birds is their dream. 小结：___不能作主语,___形式可以作主语,往往表示经常性/习惯性动作,谓语 动词用____。 Task 2: 例: Trying to escape is no use. It is no use trying to escape. 1. Seeing the film is worthwhile. __ is worthwhile _____ the film 2. Playing computer games is a waste of time. __ is a waste of time _____ computer games. 3. Playing with friends is pleasant. __is pleasant _____ with friends. 小结：用_____作形式主语，把真正的主语V-ing形式移置____。 Step3：Cooperative Learning (合作探究) （3min） 讨论内容： 完成填空 翻译句子 说出v-ing在句中充当什么成分 小组讨论： Group1 ：Task1 Group2 ：Task2 Group3 ：Task3 Group4 ：总结 Step4：Presentation & Explanation (展示点拨) Task1: 1._____(sing) is their hobby. Singing 2._____(do）exercise is the best way to lose weight. Doing 3._____ (fly) like birds is their dream. Flying What’s in common Singing is their hobby. Doing exercise is the best way to lose weight. Flying like birds is their dream. 小结： 1._____不能作主语，_____可以 作主语，往往表示经常性、习惯性动作，谓语动词用_____。 动词 V-ing形式 单数 Focus on 基本用法 the –ing form used as subject -ing形式作主语，相当于一个名词, 多指抽象、概念性的动作，经常性或习惯性行为。 【归纳用法】动词 ing形式作主语，往往表示经常性、习惯性的动作，通常置于句首。 It is no use _____(try) to escape. _____ (try) to escape is no use. Trying trying Task 2: 例： _____ the film is worthwhile. ____is worthwhile _____the film . Seeing seeing Task 2: It _____ computer games is a waste of time. __ is a waste of time_____ computer games. Playing playing Task 2: It _____ with friends is pleasant. ___is pleasant_____ with friends . Playing playing Task 2: It It is no use trying to escape. It is worthwhile seeing the film . It is a waste of time playing computer games . It is pleasant playing with friends . 小结：用_____作形式主语，把真正的主语V-ing形式移置_____。 What’s in common it 句尾 It is no use/good doing sth 做……是没有用处/好处的 It is/was worthwhile doing 做……是值得的 It is/was a waste of time doing 做……是浪费时间的 It is pleasant/useless doing… 做……是有乐趣/无用的 Read and Memorize: (读&记忆) [即时演练]———单句语法填空 (1)It is a waste of time _____(try) to persuade him to give up playing computer games. (2)It's no use _____(complain) without taking action. trying complaining ⑴ There was no knowing what he could do. ⑵ There was no telling when this might happen again. ⑶ He is nice, there's no denying it. ⑷ There was no arguing with her. 3.“There is + no” 后可用-ing形式作主语，表示“没法……”。 他能做什么很难说。 没法预料这样的事什么时候会再发生。 他很友好 ... ...
