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1、Unit4GlobalWarmingPeriod3GrammarLearningaims:1.Reviewtheuseof“it”2.Learnuseful“it”structuresImportantpoint:Learnemphaticsentence.Difficultpoint:Mastertheuseof”it”.使用说明及学法指导:1.通过自学同步检测P,完成预习案。2.完成时间:30分钟。预习案PreviewingCaseTask1写出“it”在句中指的内容。1)Guangzhouisabeautifulcity,isn’tit?(
2、)2)You’vehelpedmealot;I’llneverforgetit.()3)—What’sthis?—It’sacomputer.()4)—Whosebookisthat?—It'shers.()5)It’stimeforlunch.()6)It’sraininghard.()7)It’stwomilesfromtheschooltoourhome.()8)Itiseasytobuyanewradio.()9)Itisnousetellinghimthat.()10)Itisexcitingthatwecandowhatweliket
3、odo.()11)Ifeelitmydutytohelphim.()小结:it可以代替______,______和上文的_____;it可以指时间,_______,______,环境,度量等;it作形式_____或_____代替动词不定式,动名词和从句。Task2it替代todo作形式主语或宾语1)Ittakessb....todosth.做...要花费某人修建长城花了成千上万的人力和大量的时间。___________________________________________________________________tobuildth
4、eGreatWall.2)Itisadj+(kind,bad,brave,careless,clever,cruel,foolish,stupid,wise,wrong等形容逻辑主语特征)ofsbtodosth.你重复相同的错误真的很笨。______________________________________________________________3)Itisadj/n+forsb.todosth.常用形容词:important,necessary,natural,easy,safe,common,normal,hard,diffic
5、ult,dangerous等;名词:idea,habit,pity,shame,time,surprise,wonder等彼此帮助对我们来说非常重要。___________________________________________________________去野炊是一个好想法。____________________________________________________________________4)thinkbelievemakefindconsiderfeel等+it+adj(for/ofsb)+todo
6、that…我们认为每天清洁课室使我们的责任。Wethink_________________________________________________________ourclassroomeveryday.他感到要学好英语很困难。________________________________________________________________小结:①Itis/was+adj/n(for/ofsb)todosth.②thinkbelievemakefindconsiderfeel等+it+adj(for/ofs
7、b)+todothat…Task3it代替从句形式主语或宾语1)Itis+adj.(clear,obvious,true,possible,certain....)that/whether/when从句什么时候去上海还没有决定。____________________________________________________________他仍然还活着正是一个奇迹。____________________________________________________________2)Itissuggested(ordered/dema
8、nded/insisted/commanded...)that...表示请求,建议,命令等词时,that 从句用虚拟语气(should+