`YouareGreat!Believeyourself!!!Lookatthepicturestoanswerthequestions:What’sthis?It’sabook.Whattimeisit?It’seighto’clock.Whereisthedog?It’sunderthebed.Itisnevertoooldtolearn.活到老，学到老。Whatisthemeaningofthissentence？1.Itisabook.2.Itiseighto’clock.3.It’sunderthebed.4.Itisnevertoooldtolearn.教学目标:1.知识、技能目标：能够准确分析it在句子中的不同作用，并灵活的运用到日常对话及练习中。2.情感目标：合作精神，独立完成任务的能力。一、it作代词:新课It’slovely.Howisthedog?it代替上文提到的thedogWhoisthelovelybaby?It'sMr.Black’sson.it代替婴儿Whoisit?It'sme.身份不明确的人代替未出场的Whatdoyouthinkofthecartoon?-It’soneofthebestcartoonsthatI’veseen.代替上文中的thecartoonIt’slovely.It'sMr.Black’sson.Whoisit?-It’soneofthebestcartoonsthatI’veseen.1.作人称代词(代替前面提到的人或物)It’sadog.What’sthis?it代替thisWhat'sthat?It'sarose.2.作指示代词it代替thatItwastimetogetup.it指代时间Itis10kilometerstothecity.it指代距离It’ssunny.What’stheweatherliketoday?指代天气itItwastimetogetup.Itis10kilometerstothecastle.It’ssunny.3.作非人称代词指代时间,距离,价值,天气,环境，自然现象等Itisbadtosmoke.=Tosmokeisbad.Itisasurprisetoseesobigacock.看到如此大的一只公鸡是一件很惊讶的事情。=Toseesobigacockisasurprise.遵循英语语言的尾重原则,避免句子头重脚轻,常用it作形式主语！考试进行中....作弊？Nouse！急!急!急!Itisnogoodcheatinginthetest.Itisveryclearthatthegirlistall.ItissaidthatZhouJielunwillcomeourcity.(1)Itisbadtosmoke.(2)Itisasurprisetoseesobigacock.(3)Itisnogoodcheatinginthetest.(4)Itisveryclearthatsheistall.(5)ItissaidthatZhouJielunwillcomeourcity.二.作形式主语。真正主语置于句后，真正主语通常为不定式、V-ing,主语从句。It做形式主语句型结构：(1)Itisbadtosmoke.(2)Itisasurprisetoseesobigacock.(3)Itisnousecheatinginthetest.(4)Itisveryclearthatheistall.(5)ItissaidthatZhouJielunwillcomeourcity.It+be+adj.\n.\p.p.（表语）+todosth.doingsth.clause(真正主语）找规律1.学习英语很有趣。Itisinteresting2.嘲笑别人是不好的。Itisnogood3.据说他已经通过了考试。Itissaid试一试tostudyEnglish.thathehaspassedtheexam.laughingatothers.__________________________________________________IthinkitimportanttoreadEnglisheveryday.Hefounditdifficulttogetupearly.Ithinkitnousetalkingtohim.Wethinkitbestthatyoushoulddomoreexercise.IthinkitimportanttoreadEnglisheveryday.Hefounditdifficulttogetupearly.Ithinkitnousetalkingtohim.Wethinkitbestthatyoushoulddomoreexercise.三.it作形式宾语。真正宾语放在宾语补足语后面，真正宾语通常为不定式,V-ing,宾语从句。It做形式宾语句型结构：IthinkitimportanttoreadEnglisheveryday.Hefounditdifficulttogetupearly.Ithinkitnousetalkingtohim.Wethinkitbestthatyoushoulddomoreexercise.主语+thinkfindfeelmake…+it+adj./n.（宾补）+tododoingclause(真正宾语）找规律1.我觉得和你聊天很好。tochatwithyou.2.我认为像那样说话是很聪明的。Ithinkitclever试一试Ifeelitgoodtalkinglikethat._____________________________________________原句：Imethiminthestreetyesterday.ItwasIwho/thatmethiminthestreetyesterday.强调主语用主格昨天在街上遇见他的是我。原句：Imethiminthestreetyesterday.Itwashimthat/whomImetinthestreetyesterday.强调宾语用宾格我昨天在街上遇见的是他。ItwasinthestreetthatImethimyesterday.昨天我是在街上遇见他的。原句：Imethiminthestreetyesterday.强调地点状语?ItwasyesterdaythatImethiminthestreet.原句：Imethiminthestreetyesterday.我是昨天在大街上遇见他的。强调时间状语?ItwasIthat/whomethiminthestreetyesterday.Itwashimthat/who/whomImetinthestreetyesterday.ItwasinthestreetthatImethimyesterday.ItwasyesterdaythatImethiminthestreet.四.强调句构成:Itis/was+被强调部分+that/who/whom+其它成分ItisMay20todayanditisasunnyday.Thelazysheepdecidestogoforawalktothepark,thoughitistwomilesaway.Itisclearthatthelazysheepisveryhappytoday.Whataretheuseof“it”?Itisspringnowanditiswarm.It’sabout10a.m.anditisquietinthepark.Shethinkitgoodtofallasleepinthepark!Whenthelazysheepwakeup,itisdark.Itisadaythathewouldneverforget.Summary(总结):代词it本意‘‘它’’,既可指这又指那;时间天气均可指,谈到距离也用它;形式主宾均可做,强调句型跟that。RemembertheProverbs(谚语)with“It”.①Itisnevertoooldtolearn.活到老，学到老。②Itiseasiertofallthantorise.摔倒容易爬起来难。③Itisnousecryingoverspilt（溢出的）milk.覆水难收。④Itneverrainsbutitpours(泼水).不鸣则已，一鸣惊人。⑤Itiseasytoopenashopbuthardtokeepitalwaysopen.创业容易守业难。
