高中英语人教版必修四教师版学案：Unit2Wokingtheland语法.doc

第  PAGE 4 页 共  NUMPAGES 4 页 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 study Learning key points: To master some sentence patterns Learning 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 不可换为doing. There is no need to tell her. 提示: 当动名词用作主语时, 其逻辑主语由形容词性物主代词和名词所有格构成。 1）My sister’s being ill made me worried. 2）Your being right doesn’t necessarily mean my being wrong.[来源:学*科*网] 动名词与不定式做主语时的比较： 动名词表示的动作通常是一个习惯性的长期进行的动作, 不定式则通常表示动作的一次性或短暂性。 e.g.1）Teaching English is my job. 2）Finding ways to grow more rice has been his life goal. 3）To reach there on time is my task. Ⅲ、动名词用作宾语.动名词作宾语有两种情况。 1. 只能后接-ing作宾语的动词, 常见的有 avoid, consider, enjoy, keep, finish, suggest, dislike, delay, escape, cannot help, imagine, mind, miss, practise, cannot stand