it用法公开课课件

itDiscussionWhatjobscan“it”do?It用法归纳一、指代it二、形式it三、强调it四、含有it的短语、谚语

Lookatthepicture._____isapictureofourschool.It一、1.用作人称代词,代表前面提到的人或事物.Mypenismissing.Ican’tfind___anywhere.it---Isthisjacketyours?---Yes,______is.2.用于代替指示代词this和that。it3.用以表示时间、距离、天气、季节、环境等..It’s10:08.It’sonlyhalfanhour’swalkfromheretoourschool.3)Itissunnytoday,isn’tit?4)It’sspringnow.5)It’squiethere.Time

Distance

Weather

Season

Circumstance（环境）4、可以用来指动物、婴儿和未确定身份的人。

Whoisit?

It’slovely.Itweighsonly3kilos.二形式it-------

形式主语，形式宾语ItisvitalforallofyoutohaveagoodcommandofEnglish.你们掌握英语是至关重要的。形式主语TohaveagoodcommandofEnglishisvitalforallofyou.1.代替动词不定式做主语1)Itbeadj.(forsb.)todosth.此处adj.

通常为描述事件的形容词:easy,difficult,necessary,important,possible,

useful,useless,vital（至关重要的）,essential（必要的）...Makesentences:1.我们保持自然界的平衡是有必要的。Itisnecessaryforustokeepthebalanceofnature.2.在日常生活中练习你的英语口语是非常重要的。It’sveryimportantforyoutopractiseyouroralEnglishindailylife.你让我们做这些练习是明智的。Itiswiseofyoutoletusdotheseexcises.It's

kindofyoutohelpmework

outtheproblem.2)Itbeadj.ofsb.todosth.此处adj.

通常为描述人的形容词:kind,,nice,rude,polite,

cruel,considerate（细心的）,thoughtful,careful,careless,foolish,

stupid,clever,wise.你能帮我，真好。It’sverykindofyoutohelpme.It’sveryniceofyoutooffermeaseat.给我让座，您太好了！Makesentences:

3It+takes、took(sb.)+时间/金钱/精力等+动词不定式

Ittookmemuchtimetoedit（编辑）thispowerpoint.说实话需要很大的勇气。Ittakesgreatcouragetotellthetruth.成功需要付出极大的努力。Ittakesgreatefforts/painstosucceed.It’snogood/use/pleasuredoing…做……没益处，没用，没趣

2.代替动名词做主语Itisnousecryingoverspiltmilk.只阅读不理解没什么益处。It

is

no

good

reading

without

understanding

.

Itispossiblethatwewillrealize（实现）ourdreamsoneday.3.代替主语从句作形式主语1)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。Itisadj.+

从句显然，手机给我们带来了许多好处。Itisclearthatcellphoneshavebroughtusalotofbenefits.Itisnecessarythatyou(should)rememberthe3500words.

2)Itisimportant

(necessary，strange，natural,surprising...)

that...

that后的从句中要用虚拟语气（should+动词原形。

我们用有效的方法学习很重要。Itisimportantthatweshouldlearninaneffectiveway.Itissaidthathehasasecretweaponinmathslearning.Itissaid(reported/believed.....)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…)”。②Itisv-edthat…

人们相信健康比财富更重要。Itisbelievedthathealthismoreimportantthanwealth.Itisashamethatourcityhasbeenundertheshadowofsmogthesedays.③Itis+noun+

从句

Itisapity(ashame/anhonor/afact/asurprise/...)that...很遗憾/可耻的是/很荣幸…很遗憾你不能来参加这个派对。Itisapitythatyoucouldn’tcometotheparty.我很荣幸被邀请参加你的生日聚会.ItisanhonorthatIwasinvitedtoyourbirthdayparty.Ithappens

(seem,appears,

turns

out

,

)等不及物动词+that...

碰巧．．.看来．．．结果证明….

Itseemedthathedidn’ttellthetruth.IthappenedthatIwasoutwhenhecalled.

Itis(high)time

that...

从句应该用虚拟语气，①常用过去时态表示虚拟．②有时也用should+动词原形，should不能省，常译为＂是（正是）．．．的时侯．．．＂

Itistimethatweshouldworkhard.Itishightimethatweshouldtakeactiontodealwiththeenvironmentalproblems.是我们采取行动解决环境问题的时候了！形式宾语动词+it+形容词/名词+（forsb）todo/doing+that从句think,believe,

consider,

feel,

make,

find…

harduselessimportantnecessarynatural/essential…no

use/no

good/a

waste

of

time/ourdutyIfounditveryinterestingtostudy

English.形式宾语Ithinkiteveryone’sdutytoprotectourmother–theearth.I

think

it

important

that

you

(should)

makeaplan.

IhavemadeitarulethatIwilldosomeEnglishreadingeveryday.规定，习惯于我发现学英语很有趣。我认为保护我们的地球母亲是每个人的责任。我认为你制定一个计划很重要。it作形式宾语的特殊句型结构动词+it+if/that/when动词有喜欢类：enjoy,like,appreciate,prefer

讨厌类：hate,dislike如果你能给我这个机会我将不胜感激。Iwouldappreciateitifyoucanoffermethechance.Ilikeitwhenmymotherishappy.Ihateitwhenpeopletalkwiththeirmouthsfull.Hetookitforgrantedthathewouldpasstheexam.

Don’tdepend/relyonitthathewillarriveontime.IowedittoTomthatIfoundthejobIwanted.

想当然地认为指望把什么归功于某人Theymadeavow（誓言）ofloveinfrontofthehugestonein2005.三.强调句型It+be+被强调部+that/who(aperson)其他部分Itwasthecouplethat/whomadeavowofloveinfrontofthehugestonein2005.Itwasavowoflovethatthecouplemadeinfrontofthehugestonein2005.Itwasinfrontofthehugestonethattheymadeavowoflovein2005.Itwasin2005that…Itwasfiveo’clock_________Igothome.Itwasatfiveo’clock_______Igothome.whenthatAthatBwhenItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.Itisnotuntil…+that...直到…才请指出下列句子的强调部分：Itiswhatwethinkthatcontrolsus.四、it常用的固定搭配

makeitsucceed成功、搞定Itwas

hardbutIfinallymadeit.2.takeit

easy不要慌,别担心。3.Italldepends/thatalldepends.

那要视情况而定。4.It'suptosb.

这取决于你。Itisnevertoolatetolearn.It's

no

use

crying

over

spilt

milk.Striketheironwhileitishot.高考链接Thescientists’nextresearchjobwasclear:Findoutwhatinthefish’sbloodkeptitfromfreezing.Theirsearchledtosomereallystrangethingmadeupofaprotein(蛋白质)neverbeforeseeninthebloodofafish.Whenitwasremoved,thebloodfrozeatseawatertemperature.（2008辽宁）70.Whatdoestheunderlinedword“it”inParagraph5referto?

A.Atypeofice-saltmixture.

B.Anewlyfoundprotein.

C.Fishblood.

D.Sugarmolecule(分子）.B阅读1.Jane

was

walking

round

the

department

store.

She

remembered

how

difficult

_31_

wa