山东省泰安市肥城市第三中学高中英语 Unit 2 Woking the land语法学案 新人教版必修 4教学内容Learning aims: 知识与能力：To master some sentence patterns过程与方法：To master the usage of the Verb-ing form情感态度价值观：To enjoy the pleasure of studyLearning key points: To master some sentence patternsLearning difficult points: To master the usage of the Verb-ing form【学案使用说明】在提前预习的前提下完成学习指导即时感悟【回顾复习】Check the home work (have a dictation of the language points)【自主 合作 探究】Ⅰ.动词-ing 形式的构成: 是在动词末尾加-ing 形式构成,如: do-doing, be-being, ask-asking, etc.否定形式: not+ -ing 构成。动词-ing 形式不能单独作谓语, 没有人称和数的变化,有时态和语态的变化。它同时具有名词和动词的特征, 在句中可以作主语、宾语等。Ⅱ.1.动词-ing 形式作主语表示经常的、习惯性的动作或状态, 谓语动词通常用单数。如： 1）Walking is a good form of exercise for both young and old. 2）Watching news on TV has become a routine for me. 3）Learning new words is very important for me．2. -ing 形式作主语时常后置, 此时须用 it 作形式主语, 用形容词或名词作表语。如 useful，useless，good，fun；no use，worth 等。如：归纳: 常用-ing 形式作主语的句型有：It +be +a waste of time doing It is/was no good/use doing It is/was hardly/scarcely worth doing It is/was worth/worthwhile doing It is useless trying to argue with Shylock．Is it any good trying to explain?It is pleasant working with you．3. 在 there be no...结构中作主语, 这种结构的意思相当于“It is impossible to do… ”。1)There is no hiding of evil but not to do it．若要人不知, 除非己莫为。2)There is no joking about such matter.这种事开不得玩笑。3)There was no knowing when he would leave.无法知道他什么时候离开。注意: There is no need to do sth 没必要做某事, 在此句式中 to do 不可换 1为 doing. There is no need to tell her. 提示:...
