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Unit3AhealthylifeGrammar：Theusagesofit一.基本用法:it做代词1)Lookatthepicture._____isapictureofourschool.2)Someoneisknockingatthedoor.Whois__?1.用作人称代词，代替前面提到的人（不明确的）或物,也可以指动物或婴儿.itIt---Isthisyourbook?---Yes,______is.2.用于代替指示代词this和that.it一.基本用法:it做代词1）Itishalfpasteightnow.2）It’sonlyhalfanhour’swalkfromheretoourschool.3）Ihopethatitwillbefinetomorrow.4）Ithasrainedmuchthisyear.5）It’sspringnow.6）It’squiethere.7）Itis40℃!Yougotahighfever!3.非人称代词用以表示时间、距离、天气、气候、季节、环境、温度等timedistanceweatherclimateseasonenvironmenttemperature1.人称代词a.用作人称代词，代替前文提到的人或物，以避免重复:b.也可以指动物或婴儿(未知性别的婴儿或孩子).2.非人称代词有时并不指具体的东西，可指天气、时间、距离、环境等Itwasveryquietinthecafé.Itishalfanhour’swalktothecity.3.指示代词指代this或thatThisisyourpen,isn’tit?歌名：Anythingbutordinary(绝不平凡）歌手：艾薇儿·拉维妮（AvrilLavigne）•SometimesIgetsoweird•Ievenfreakmyselfout•Ilaughmyselftosleep•It'smylullaby•SometimesIdrivesofast•Justtofeelthedanger•Iwannascream•Itmakesmefeelalive•Isitenoughto•Isenoughtobreath•Somebodyripmyheartout•Andleavemeheretobleed•Isenoughto•Somebodysavemylife•I'dratherbeanythingbutordinaryplease•Towalkwithinthelines•Wouldmakemylifesoboring•IwanttoknowthatI•Havebeentotheextreme•Soknockmeoffmyfeets•Comeonnowgiveittome•……loveitdieitIsitenoughtolove？Itisenoughtolove.（肯定句）(一般疑问句）形式主语真正主语当__________、________、_________在句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。此时it只起先行引导作用，本身无词义。Itbe+adjnp.p(for/ofsb)todosthdoingsth主语从句+difficult,important，natural,necessary，etc.fun,apity,nouse/good,time,etc.said,reported,suggested,ordered,etc.it用作形式主语从句动词不定式动词-inggiveupdrinking?difficult!CompletethesentencesItisdifficultforthemto__________.giveupdrinkingItis+adj+todosth.See!Abighenploughing(｀plauiŋ耕地)!Itis__________________________.(看到如此大的一只母鸡是一件惊讶的事情)asurprisetoseesobigahenItis________________________________.(看到如此大的一只母鸡耕地是一件有趣的事情)funtoseesuchabighenploughingItis+n+todosth.Itisnogood\nouse_________________(cryoverspiltmilk).Oh!Mymilkisspilt(溢出).cryingoverspiltmilkItis+_______________+doingsth.做...是没用的/没好处的nouse/nogood覆水难收。Completethesentences到了我们要戒酒的时候了。____________________________________.It'shightimethatweshouldquitdrinkingItis+（high）time+that...shoulddo...到了做...的时候It+be+adj.+主语从句注意：如若形容词为important，necessary，goodnatural...多使用虚拟语气should+动词原形1.Itisimportantthat(我们尊敬父母是重要的.)2.Itisnecessarythat(我们记住这些单词是有必要的.)we(should)respectourparents.we(should)rememberthesewords注意：常见的过去分词有believed,expected,reported,said,shown，如果主句中的过去分词是表示请求，建议，命令等词如：suggested/ordered/demanded/insisted/commanded...等时that后的从句要用虚拟语气（should+动词原形），should可以省略1.Itisshownthat(鸡爪看上去像数字2）It+be+过去分词+主语从句thechickenfeetlooklikethenumbertwo注意：常见的过去分词有believed,expected,reported,said,shown，如果主句中的过去分词是表示请求，建议，命令等词如：suggested/ordered/demanded/insisted/commanded...等时that后的从句要用虚拟语气（should+动词原形），should可以省略1.Itissuggestedthat(父母要关注孩子情绪。）It+be+过去分词+主语从句parentsshouldpayattentiontochildren’sfeelingsIt用作形式宾语当_________、___________、_________在句子中作宾语时，为保持平衡，避免句式结构的混乱，常用it作形式宾语，而将真正的宾语放在句尾。此时it只起引导作用，无意义。s+v+it+adj.n(forsb)todosth..从句doingsth+(find/think/feel)possible,important，necessary,etc.arule,one'sduty,ahonor,etc.从句动词不定式动词-ing我认为业余时间打篮球是有必要的。_________________________________________________.Ithinkitnecessarytoplaybasketballinsparetimes+v+it+adj/n+todo/that…Iloveit!我发现在雪人旁点火(lightafire)是愚蠢的。_______________________________________________.Ifinditstupidtolightafirebesidethesnowmans+v+it+adj/n+todo/that…s+v+it+adj/n+todo/that…我认为不浪费粮食是我们的责任。________________________________.IthinkitourdutynottowastefoodIMaryinthestreetyesterdayItwasIthat/whometMaryinthestreetyesterday.ItwasMarythatImetinthestreetyesterday.ItwasinthestreetthatImetMaryyesterday.ItwasyesterdaythatImetMaryinthestreet.强调句Itbe+被强调部分+that/who+句子其他成分ImetMaryinthestreetyesterday.1.It无意义，不可换成this/that.2.be只用单数is/was3.被强调的部分不能为谓语动词.4.强调的部分是人也可用who其它一律用that.Ifyoucananswercorrectly,Iwillgiveyouthethumbs-up.Thegroupgettingthemostthumbs-upwillbethewinner.为你点赞积赞最多Ariddle(谜语)代词我，本意它，即可指这又指那；时间天气均可指，谈到距离也用我；形主形宾均可做，强调句型跟that.GuesswhoIam.Theansweris__?__.“it”indailylife123456Itisuptoyou.Itdoesn’tmatter.Ihavegotit.BelieveitornotYouwillmakeit.Don’tmentionit.it取决于你没关系你会成功别提了我懂了信不信由你Theproverbswithit1.Itisnevertoooldtolearn.2.Strikewhiletheiron(铁)ishot.3.Ittakestwotomakeaquarrel.活到老，学到老趁热打铁一个巴掌拍不响1234Fillintheblankswithcorretform1.Itiseasier___________(say)thantodo.2.Itisnogood_________(cheat)intheexam.3.Itis___________(amaze)thathemadesuchamistake.tosaycheatingamazing1234CompletethepassageTheAsianGamesarebeingheldinthecityofGuangzhounow.Itwasgreatfun___________-(watch)theopeningceremony.____wasfinethatnightanditwas_________(amaze)thatthetorchwaslitbyfireworlks.Although____isfarawayfromourhometown,wethink______easy__________(enjoy)theperformance.Fromthem,wecanlearnthatitisnecessary_____ustokeepourdream.watchingItamazingittoenjoyforit1.Itishightimethathe______________(stop)smoking.2.Itwasthesecondtimethatshe______(come)toChina.3.Ithasbeen2yearssincewe___________(leave)here.4.It______(be)about2monthsbeforewehaveaholiday.5.Itis7:20whenshe________(start)tohavelessonseveryday.shouldstop/stoppedhadcomeleftwillbesta