①Itisnevertoooldtolearn.②Itiseasiertofallthantorise.③Itisnousecryingoverspilt(溢出的)milk.④Itneverrainsbutitpours(泼水).Proverbs(谚语)with“It”活到老,学到老。摔倒容易爬起来难。覆水难收。不鸣则已,一鸣惊人。⑤Itiseasytoopenashopbuthardtokeepitalwaysopen.⑥Ittakesthreegenerations(代)tomakeagentleman.创业容易守业难。十年树木，百年树人。Grammar:Useof“It”25/2/25课文原句再现1.It’sabeautifuldayhereandIamsittingunderthebigtreeattheendofthegarden.2.Yourmothertellsmethatyoustartedsmokingsometimeagoandnowyouarefindingitdifficulttogiveitup.3.Believeme,Iknowhoweasyitistobeginsmokingandhowtoughitistostop.Theuseof“it”Theuseof“it”1.1.用作人称代词，代表前面提到的人或事物。用作人称代词，代表前面提到的人或事物。1)1)Who’sit?_________me.Who’sit?_________me.2)2)Lookatthepicture._____isapictureofourLookatthepicture._____isapictureofourschool.school.It’sIt’sItIt2.2.用于代替指示代词用于代替指示代词thisthis和和thatthat。。---Isthisjacketyours?---Isthisjacketyours?---Yes,______is.---Yes,______is.ititReadandanalyzethefollowingsentences.•ItisFridaytoday.•ItwasverycoldlastMonday.•Itisabout8:30now.•Itisabout25kmfromLongxiantoBazi.•ItliesinthesouthofShaoguancity.•Itis40°C!Yougotahighfever!•Question:Whatdoes“it”inthesesentencesreferto?•Conclusion:it可以用作非人称代词，表示_____,_____,______,______,______,_____等。DateweathertimedistanceplaceTemperature日期天气时间距离地点温度e.g:______a.Jimisatthedoor．____wantstoseeyou．b.Someoneisatthedoor．____mustbeJim．A.That,ItB.It,HeC.He,ItD.Who,He一般说来，在指代身份或性别明确的人时，通常要根据情况用代词he／she；若是指代身份或性别不明的人，则用代词itBackC1.Ican’tfindmypen.I’mgoingtobuy_____.2.Lifetodayisbetterthan______intheolddays.3.Ican’tfindmypen.Imusthavelost_____._____用来指代前面提到的可数名词，所指的是事物本身；______则用来替代前面出现过的可数名词，泛指，指一类事物中的一个a+n；______用来代替不可数名词或单数可数名词，特指。onethatititonethat.壹It作为形式主语当不定式、动名词、从句等用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it.25/2/25eg:1.Itisillegal（forateenager）todriveacarwithoutalicense.2.Itisnecessaryforyoutogivehimaletter.思考：在句1和句2中it的作用是___________,真正主语是________。形式主语不定式短语（1）It+be+adj.+（forsb.）todosth.此处adj.通常为描述事件的形容词：easy，difficult，hard，necessary，impossible，likely，，right，wrong，important，，polite，obvious，useful，useless，dangerous…25/2/25（2）It+be+adj+ofsb.todosth此处adj.通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，careless，foolish，stupid，wise，crazy.eg:1.It‘skindofyoutohelpmewiththeproblem.某人做某事某人是…….2It’sfoolishofyoutoquityourjobnow.25/2/253.Itisnogoodcryingoverspiltmilk.4.Itisnousecastingpearlsbeforeswine.在句3与句4中，it的作用是_________,真正主语是____________.形式主语动名词短语构成如下结构：Itis+nouse/nogood/notanygood/notanyuse+doingsth.Readandanalyzethefollowingsentences.•Itisobviousthatthewaterwastoblame.•Isitpossiblethathewillbecomethechairmanofourcountry?•ItisamazingthatatmyageIstilllooklikeastudent!•分析：it是______,句子真正的主语是——____________形式主语that引导的主语从句总结：Itis+____+that从句adj.跟踪训练1：Itis+adj.+that从句•很明显他已经知道了那个坏消息。•姚明篮球比易建联打得好是肯定的。Itisobviousthathehasknownthebadnews.ItiscertainthatYaomingplaysbasketballbetterthan...
