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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,预习案PreviewingCaseTask1写出“it”在句中指的内容。I)Guangzhouisabeautifulcity,isn'tit?(YoiTvehelpedmealot;Fllneverforget孔
2、(—WhaFsthis?—Itacomputer.(一Whosebookisthat?一Jt*shers.(Ifstimeforlunch.()It^sraininghard.()Ifstwomilesfromtheschooltoourhome.(Itiseasytobuyanewradio.(Itisnousetellinghim(ha匸(完成预习案。2.完成时间：30分钟。2)3)4)5)6)7)8)9)10)jtisexcitingthatwecandowhatweliketodo.(II)1feeljtmydutytohelphim.(可以指时间,代替动词不定式，动
3、名词和从句。，环境，度量等;小结：it可以代替,和上文的it作形式或Task2it替代(odo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吋间。tobuildtheGreatWall.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,natura
4、l,easy,safe,common,normal,hard,difficult,dangerous等；名词：idea,habit,pity,shame,time,surprise,wonder等彼此帮助对我们來说非常重要。去野炊是_个好想法。4)thinkbelievemakefindconsiderfeel等+il+adj(for/ofsb)+todothat...我们认为每天清洁课室使我们的责任。Wethinkourclassroomeveryday.他感到要学好英语很困难。小结：①Itis/was+adj/n(for/ofsb)todosth.②thin
5、kbelievemakefindconsiderfeel等+it+adj(for/ofsb)+todothat..6、议；有命令…)据建议推迟会议。3）Itis+v-ed（said/believed/reported/thought/known/estimated等+that从句常译为"据・•・”据扌艮道彳也已经来了」匕京。hehascometoBeijing.据相信他是世界上最伟大的人之一。heisoneofthegreatestpeopleintheworld.4）常用句型:Ithappens碰巧/seems,looks,appears看来that...Itisthefirst（second...）timethat..."是第一（二）…次…”。他昨天碰巧在街上遇到他的老师。hemethis
7、teacherinthestreetyesterday.看来儿天内他会冋来。hewillbebackinafewdays.这是我第一次到这里。Ihavebeenhere.5）thinkbelievemakefindconsiderfeel等+it+adj（for/ofsb）+that/whether/when从句他们发现在两天内完成工作是很艰辛的。Theyfound.Task4it代替doing主语或宾语1）Itis/was+nousegoodfunpleasure等+d
