it-作形式主语-高一-英语-课件

welcomeA:Whathappenedoutside?B:＿＿israiningoutside.Lookatthepicturesandfillintheblanks.ItA:Whatdayisittoday?B:_______

isThursdaytoday.

ItA:Howfarisitfromtheearthtothesun?B:________isabout150millionkm.It结论:it可以用作非人称代词，表示天气、时间、距离、地点等What’sthefunctionof“It”inthesesentences1.Itisnecessarytolearnteamspirit.2.It’sapitythatyoumissedtheexcitingfootballmatch.

3.It’snogoodstayinguptoolate.

学习团队精神是十分必要的。你错过了这场精彩的足球比赛真是太遗憾了。熬夜没有好处。Trytotranslatethefollowingsentences.It作形式主语

当不定式、动名词、that从句等作句子主语时,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it作形式主语It作形式主语

1.

Itisillegal（forateenager）todriveacarwithoutadrivinglicense.2.Itisnecessaryforyoutogivehimaletter.3.

It’skind

of

youtohelpmewiththeproblem.在句1,2,3中it做：__________,代替句中_________适用的句型结构可总结为：（1）_______________________________（2）_______________________________

形式主语不定式短语It+be+adj.+（forsb.）todosthReadthefollowingsentencesandfigureoutwhat“it”refersto

Itis/was+adj.+of

sbtodosthAttention:（1）It+be+adj.+（forsb.）todo

对某人来说做某事怎么样此处adj通常为描述事件的形容词：easy，difficult，hard，necessary，impossible，important，obvious，useful，dangerous…e.g.It’simpossibleformetofinishsomuchworkinashorttime.（2）It+be+adj+ofsb.todosth

某人做某事某人是…….

此处adj通常为描述人的形容词：kindnice，rude，considerate，careless，foolish，wise……e.g.It’sfoolishofyoutosleepinclass.

Use“It”tomakesentencesdifficultkind1.It’sdifficultforcarstomovefastwhenthereisatrafficjam.2.It’sverykindofthevolunteerstohelptheoldtocrosstheroad.rudeexciting3.It’sexcitingforustoplaycomputergames.4.Itwasrude/impolitetoshoutatothers.2026/4/233.Itisnogoodcryingoverspiltmilk.4.Itisnousearguingwithanunreasonableman.在句3与句4中，it做____________,代替的是____________常用句型结构为：___________________________.形式主语动名词短语Itis+nouse/nogood+doingsth.光说不做没有用.2.不能爱哪行干哪行，要干哪行爱哪行.3.因为自己的错误去责备(blame)别人是没有用的.练一练Itisnousesayingwithoutdoing.Itisnousedoingwhatyoulike;youhavegottolikewhatyoudo.Itisnouseblamingothersforyourmistake.5.Itisanhonorthathehasbeenelectedasthemonitorofourclass.6.ItisamazingthatatmyageIstilllooklikeastudent!7.Itwasapitythathelostthegame.

在5、6、7句中it做________,代替的是_______,常用句型结构为：____________________.形式主语that从句Itis+n./adj.+that从句RewritethesentencestomakeadialogueForexample:

Thisproblemiseasytosolve.A:Thisproblemiseasytosolve.B:whatdidshesay?C:Shesaidit’seasyforhertosolvetheproblem.1.Gettingupearlyinwinterisdifficult.2.Mostpeoplebelievesmokingcausescancer.3.Don’ttrytocheatinanexam.4.Youmaysufferfrombadhealthifyoukeepeatingtoomuchfat.

Itissaidthat…

Itisreportedthat…Itishopedthat…Itiswellknownthat…Itisgenerallyconsideredthat…Itissuggestedthat…据说……据报道……人们希望……众所周知…..人们普遍认为……有人建议……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。

Itis/was+done+that从句

1.人们希望世界上不再有战争。_________________therewillbenomorewarsintheworld.2.据说日本发生了地震。

_________________aterribleearthquakehappenedinJapan.

补全下列句子Itishopedthat

Itissaidthat_________________________heshouldgiveupsmokingatonce.Itissuggestedthat3.人们普遍认为淘宝让我们的生活变得更容易__________________________________

Taobaomakesourlifeeasier.4.有人建议他立即戒烟。Itisgenerallyconsideredthat

Itseems/sounds/looks

that+从句

1.Itseemedthathedidn’ttellthetruth.2.Itsoundsthatsomeoneisknockingatthedoor.他似乎并没有讲实话。听起来有人在敲门。TranslatethesentencesintoChineseSUMMARY:whathaveyoulearnedinthisclass?Ihavelearnedthat……1….2…..1.Ittakesme30minutes__toschoolbybikeeveryday.

A.goingB.togoC.goesD.go

2.It'snoteasy____us____aforeignlanguage.

A.for;learningB.of;learningC.of;tolearnD.for;tolearn

3.Is____necessarytocompletethedesignbeforeNationalDay?A.this

B.that

C.it

D.he4.Itisfoolishofyou_______intheexam.

A.cheating

B.cheated

C.tocheat

D.cheat

1.姚明篮球比易建联打得好是肯定的(certain)。2.过度玩电脑游戏对眼睛有害(harmful)。3.多吃绿色食物对健康很有好处(benefit)。ItiscertainthatYaoMingplaysbasketballbetterthanYiJianlian.Exercises:using“it”totranslatethefollowingsentencesItisharmfulforoureyestoplaytoomuchcomputergames.Itisofbenefittoourhealthtoeatmorepollution-freefood1._______________(我也许可以)toleaveamessageforher(likely).2.._____________________(抱怨是毫无用处的)，andtheyneverlisten(use).3.__________________________(对小孩子来说是危险的）totaketrainwithoutanadult’scompanion.ItislikelyformeItisnousecomplainingItisdangerousforalittlechild据报道，广东本月遭受了特大暴雨袭击。根据目前情况来看，这次暴雨显然造成了极大地破坏。遗憾的是很多部门在此次救援中并没有及时采取措施。因此，将水和食物及时送往灾区是十分必要的，同时，广大市民希望类似情况不要再发生。TrytotranslatethepassageItisreportedthatGuangdongprovincewashitbyagreatrainstormthismonth.Accordingtothereport,itisobviousthattherains