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Unit3AhealthylifeLearningaboutlanguageDiscoveringusefulwordsandexpressions1Findawordorphrasefromthetextthatmeansthesameastheunderlinedwordsineachsentence.1.Youwillbeabletostopsmokingeventuallyifyouaredeterminedenough.quit,tough2.HavinglivedinHawaiiallhislife,hewasnotusedtothecoldofNorthernEurope.3.Shefeltembarrassedaboutherbodyshape,soshedecidedtogoonadiet.4.Runningamarathonwillleaveyououtofbreath.accustomedtoashamed(ofher)breathless5.Youreallyhavenoideajusthowhopelesscancercanmakeyoufeel.6.Theeffectsofdrinkingtoomuchalcoholonyourhealthcanbeserious.7.Doingexerciseseverydaycannotonlymakeyourmusclesstrongerbutalsohelpyourelax.desperate(The)alcoholic(effects)strengthen(yourmuscles)8.Ifyouareexpectingababy,yoursmokinghabitmightcauseproblemsforit.9.Inspiteofallhiseffortshefailed.Hewassoupsetabouthimselfthathefeltlikecrying.10.Hefelthehadtomakeuphismindoneverystepinsteadoftakingrisks.pregnantdisappointeddecideon2Fillintheblankswithwordsorphrasesfrombelow.duetocigarettestoughunfitalcoholmentalquitwithdrawaladolescentsaddictedtostresseffectsSmoking_________,drinking_______ortakingotherdrugsproducemanyharmful______andhavenorealbenefits.Sowhydo___________doit?Perhapssomethinkitmakesthemlook______cool.Othersmaythinkitwillhelpwith______intheirlivespossibly________pressurefromtheirparentsorteachers.cigarettesalcoholeffectsadolescentstoughstressduetoSomemayjustwanttoexperiment.Whattheydonotrealizeishoweasyitistobecome__________smoking.Infactitisthe_______addictionratherthanthephysicaleffectswhichmakeitreallyhardto____smoking.Whenanadolescentrealizeshow_____heorsheisbecoming,itistoolate.addictedtomentalquitunfitSadlythe__________symptomscanbequitesevereforsomepeople.Ofcoursethebestwaytodealwiththesedrugsisnottogetintothehabitinthefirstplace!withdrawalAnswerkeyforExercise2:1.Itisdifficulttogiveupsmoking.2.Itseemsthatsomeyoungpeoplethinktheylookattractivewhentheysmoke.3.Itisbelievedthatsmokingcausescancer.4.Itisnousetryingtoquitonastressfulday.5.ItisastonishingthatChinaproducesone-thirdoftheworld’scigarettes.6.Itisillegaltoadvertisecigarettesinthiscountry.Discoveringusefulstructures(P21)7.Itiswonderfulthatmyfatherhasquitsmokingatlast.8.Itwasadarkandstormynightwhentheoldmanstartedhisjourney.9.Itislikelythatyoucouldsufferfrombadhealthifyoukeepsmoking.10.Itisnecessaryforyoutotakepillstocontrolyourbloodpressure.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。③Itisnousecryingoverspilt(溢出的)milk.覆水难收。④Itneverrainsbutitpours(泼水).不鸣则已,一鸣惊人。Proverbs(谚语)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!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.Itistruethathewilltreatmeforbreakfasttomorrow.Itiscertainthatourclasswilldoagoodjobinthefinalexam.Isitpossiblethathewillbecomethechairmanofourcountry?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1)Who’sit?________me.2)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、环境等1)Itishalfpasteightnow.2)It’sonlyhalfanhour’swalkfromheretoourschool.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,hard,necessary,unnecessary,possible,impossible,likely,unlikely,right,wrong,important,unimportant,legal,illegal,well-mannered,ill-mannered,polite,impolite,clear,obvious,certain,suitable,proper,fit,useful,useless,dangerous…Itisillegal(forateenager)todriveacarwithoutalicense.2)Itbeadj.ofsb.todosth.此处adj.通常为描述人的形容词:kind,unkind,nice,rude,cruel,considerate,thoughtful,thoughtless,careful,careless,silly,foolish,stupid,clever,wise,crazy.It'skindofyoutohelpmewiththeproblem.It’snogood/usedoing…It’s(well)worthdoing…It’s(well)worthone’swhiledoing/todo…It’s(well)worthwhiledoing/todoIt’snousecryingoverspiltmilk.3)It替代作主语的动名词的常见句型2.it作形式主语替代主语从句Itisclear(obvious,true,possible,certain…)that...该句型中it是形式主语,真正的主语是that引导的主语从句,常译为“清楚(显然,真的……)”,是主语从句最常见的一种结构。e.g.Itisveryclearthathe’sroundandtalllikeatree.①Itisadj.+clauseItissaid(reported/learned/believed/thought/known/told/hoped...)that...该句型中的it仍是形式主语,真正主语是that引导的主语从句;该结构常译为“据说(据报道,据悉……)”。ItissaidthathehascometoBeijing.Itisreportedthatanotherearthsatellitehasbeenputintoorbit.②It