Lesson103AirPollution教学目标:1、学习以下单词:pollution,headache,crowded,stuffy,breathe,air,sick,lung,cancer,fresh,clean(v.),blood,health,sake,fight2、学习以下短语:lungcancer,forone'ssake,doone'sparttodosth.,fightagainst3、学习以下语法:(1)“get+形容词”的用法;(2)两个形容词共同修饰一个名词逗号的使用情况。教学过程:Step1老师示范朗读:Whydopeoplegetheadachesinacrowded,stuffyroom?Becausetheyarebreathingbadair.Peoplewhobreathebadairforalongtimecangetreallysick.Theymayevengetlungcanceranddie.Peopleneedfreshair.Freshaircleanstheblood.Forourhealth'ssake,weshouldall,there-fore,doourparttofightagainstairpollution.Step3领读单词和短语两遍:pollution,headache,crowded,stuffy,breathe,air,sick,lung,cancer,fresh,clean(v.),blood,health,forone'ssake,doone'sparttodosth.,fightagainstStep4学生自读单词和短语。Step5导复述:把关键词写在黑板上,老师先示范复述,然后带领学生看着黑板复述课文,然后让学生自己复述。先全班学生齐复述,然后是小组复述和提问个别学生复述。Step6语法讲解:1.主系表结构2.系动词get和become的区别become之后可以跟任何的形容词,而get之后的形容词3.两个形容词共同修饰一个名词时,本应该使用and连接,但也可以使用逗号取代and,使这两个形容词的关系更加密切。注意:有些形容词与名词连用,形成一个固定的短语(如:anoldman,ayoungboy,aredcar),此时之前另置形容词时,该形容词之后不得再置逗号或者and。Step7PracticeandConsolidation(练习和巩固)Step8Homework1、Recitethenewwordsandexpressions.2、Retellingthetext.