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1、GrammarTheuseof“it”Talkaboutthefollowingpictures,usingItisnouse/gooddoingsth做…没有用/不好Itisfundoingsth做……很有趣还想跑？甭想！想追我?没门！①Itisnevertoooldtolearn.活到老,学到老。②Itiseasiertofallthantorise.摔倒容易爬起来难。③Itisnousecryingoverspiltmilk.覆水难收。④Itneverrainsbutitpours(泼水).不鸣则已,一鸣惊人。Proverbs(谚语
2、)with“It”⑤Itiseasytoopenashopbuthardtokeepitalwaysopen.创业容易守业难。⑥Ittakesthreegenerations(代)tomakeagentleman.十年树木,百年树人。Readandanalyzethesentences.ItisFridaytoday.ItwasverycoldlastMonday.Itisabout8:30now.Itisabout25kmfromLongxiantoBazi.ItliesinthesouthofShaoguancity.Itis40°C
3、!Yougotahighfever!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Itisobviousthatthewaterwastoblame.Itistruethathewilltreatmetobreakfasttomorrow.Itiscertainthatourclasswilldoagoodjobinthefinalexam.Isitpo
4、ssiblethathewillbecomethechairmanofourcountry?ItisamazingthatatmyageIstilllooklikeastudent!分析:it是__________,句子真正的主语是___________________。Readandanalyzethesentences.形式主语that引导的主语从句牢记以下常用于该句型的形容词Itisclear/obvious/true/possible/certain/amazing/ridiculous等+that从句.思考:为什么要用it做形式
5、主语而把真正主语放到后面去?遵循英语语言的尾重原则,避免句子头重脚轻。Theuseof“it”一、用作人称代词,代表前面提到的人或事物Who’sit?________me.Lookatthepicture._____isapictureofourschool.It’sIt二、用于代替指示代词this和that。---Isthisjacketyours?---Yes,______is.it三、用以表示时间、距离、天气、气候、季节、环境Itishalfpasteightnow.It’sonlyhalfanhour’swalkfromheret
6、oourschool.3)Ihopethatitwillbefinetomorrow.4)Ithasrainedmuchthisyear.5)It’sspringnow.6)It’squiethere.TimeDistanceWeatherWeatherSeasonCircumstance替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。四、it用作形式主语1.代作主语的动词不定式1)Itbeadj.(forsb.)todosth.此处adj.通常为描述事件的形容词:easy,difficult,ha
7、rd,necessary,unnecessary,possible,impossible,likely,unlikely,right,wrong,important,unimportant,legal,illegal,well-mannered（彬彬有礼的、气质高雅的,）ill-mannered（没规矩的粗鲁的）,polite,impolite,clear,obvious,certain,suitable,proper,fit,useful，dangerous…Itisillegal(forateenager)todriveacarwit
8、houtalicense.2)Itbeadj.ofsb.todosth.此处adj.通常为描述人的形容词:kind,unkind,nice,rude,cruel,considerate,tho
