江苏省常州市西夏墅中学高中英语 Unit2 The environment Grammar and usage教案2 牛津译林版必修5.doc

unit2 the environment grammar and usage2教材：牛津高中英语(模块五)高二上学期文档内容：教学设计教案单元：unit 2 the environment板块：grammar 2thoughts on the design: 本节课是本单元grammar的第二课时，内容是现在分词短语，目的是让学生了解现在分词短语在句中作状语，可表示时间，原因，结果，条件等。非谓语动词在高中语法的学习中占了十分重要的地位，也是学生在学习中比较难掌握的一项语法内容。因此课时的设计上，由易到难，让学生在其轻松愉快的环境中掌握所学的内容。teaching aims: after learning this section, the students will be able to:1. know the verb-ing can express the time, the reason, the result and the condition.2. have the opportunity to practise using verb-ing phrases.teaching procedures: step 1 revision (ppt 4)revision of functions of verb-ing form as attribute, predicative, object complement explanation课前对上一课时内容回顾，以促进学生对现在分词在句中作定语、表语和宾语补足语作用的掌握。step 2 adverbial (ppt 5-14) seeing the teacher entering the room, the students stood up. being a student, he was interested in sports. having written the letter, john went to the post office.现在分词作状语时，注意如下三点：1. 相当于相应的从句 (ppt 6-8)rewrite sentences1) because he knew that there was a dog outside, the little boy didnt open the door. = knowing that there was a dog outside, the little boy didnt open the door. （原因）2) the couple went shopping. as a result, they left their eldest daughter alone at home. =the couple went shopping, leaving their eldest daughter alone at home. (结果）3) time permitting, i will meet you for lunch.= if time permits, i will meet you for lunch. (条件)4) asking around, i find many people willing to pay slight higher prices for things that are environmentally.= when i ask around, i find many people willing to pay slight higher prices for things that are environmentally. （时间）2. 分词的逻辑主语就是全句的主语 （ppt 9-10）he traveled on the plane like this, keeping the tortoise hidden in a blanket.(keeping的逻辑主语和句子的主语一致，都是he)_ through the park, beautiful flowers could be seen everywhere. (b)a. walking b. when i walked c. walk d. walked3. 现在分词作状语时有不同的时态与语态 （ppt 11-14）1) 完成主动式having finished her homework, she went to bed.having heard this, the woman astronaut expressed her satisfaction.分词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，不能做定语用。2) 一般被动式表示正在发生的被动动作,在句中作定语或状语。the car being repaired is mine. the car which is being repaired is mine.being repaired, the car cant be used.as/because it is being repaired, the car cant be used.3) 完成被动式表示发生在谓语动作之前的被动动作，在句中多作状语，不能作定语。having been praised a second time, i decided to make still greater progress.having been asked to stay, i couldnt very well leave. explanation通过句型转化的练习引导学生掌握现在分词相当于相应从句的功能；以易错题，巩固学生对于分词的逻辑主语就是全句主语这一知识点的学习；并以例句一一说明现在分词作状语时的不同语态与时态。step 3 extensions (ppt 15-16)1. 非谓语动词的否定式均为not+非谓语动词 现在分词的否定形式 not + 现在分词（完成的否定式not 放在having之前）not knowing how to dye the silk red, he went to her for help.not having heard from her son for a long time, the mother worried a great deal.2. 一些独立结构： generally speaking (speak), we have learnt a lot in this school. judging (judge ) from his appearance, he is somebody. to tell ( tell ) you the truth, your work is terrib