高中选修六英语Unit 5-【精品课件】

精品课件欢迎下载高中选修六英语Unit5Theuseof"It"it的用法

it表示同类同物，替代前面提到的的单数名词或不可数名词本身，特指。one的用法

one表示同类不同物，用来代替前面提到的单数名词，指同一类中的一个，泛指。one可以根据语义在它的前面或后面加上一些定语。

that的用法

that表示同类不同物，替代前面提到的的单数名词或不可数名词，特指。that可以根据语义在它的后面加上一些定语，多数是of短语；它的前面不能存在任何定语。

一.人称代词:it,one,that1)Ilikethishousewithabeautifulgardeninfront,butIdon’thaveenoughmoneytobuy____.

A.one

B.it

C.this

D.that2)Hefoundthiskindofcellphonebothgoodandcheap,sohedecidedtobuy______.

A.it

B.those

C.them

D.one3)Myseatwasnextto_______oftheteacher.

A.one

B.it

C.that

D.seat

二.it作非人称代词it有时并不指具体的东西，而泛指天气、时间、日期、距离、价值、度量、温度、环境等，称为非人称的it：e.g.

it泛指时间

1)Itis(high)timethatchildrenshouldgotobed.

=Itis(about)timethatchildrenwenttobed.

该句型中that后的从句应该用虚拟语气，值得注意的是常用过去时态表示虚拟；有时也用should+动词原形,should不能省，常译为“是......的时候了”__________________________________2)Itisthefirsttime(that)Ihavebeenhere.

=Thisisthefirsttime(that)Ihavebeenhere.

该句型中的that从句不用虚拟语气，而用各种时的完成体。至于用什么时态，由主句的谓语动词的时态决定。如果主句是一般现在时，从句用现在完成时态；如果主句是一般过去时，后面从句则用过去完成时态。该结构中that可以省去。it有时用this来替换，常译为：是第一（二）次做.....__________________________________________Itisthefirst(second...)timethat+现在完成时Itwasthefirst(second...)timethat+过去完成时3)Itis(hasbeen)5yearssincehisfatherdied.

It

was5years

sincehisfatherhaddied.

该句型主要用来表示瞬间动词的完成时与表示一段时间的时间状语连用的情况。主句中是时间段作表语，其时态是一般现在时或现在完成时，since从句通常是瞬间动词的一般过去时态。如果主句是一般过去时，从句则用过去完成时。Itis/hasbeen+时间段+since+(过去时)...Itwas+时间段+since+(过去完成时)...4)

Itwas5o’clockwhenhecamehere.

该句型中的when引导的是一个时间状语从句，主句中的it指时间，表语由具体的时间充当。常译为“当…

的时候,是…”。_________________It+be+时间点+when...5)

Itwas3daysbeforehewenttoBeijing.

It

willbenotlongbeforehefinisheshisjob.

该句型主句中的it指时间,主句中的时态常是一般将来时或过去时两种时态。主句中的表语多是long,notlong,3days等表示时间段的词或短语。常译为“…之后才/就…”。_______________________________________Itwas+时间段+before+(过去时)...Itwillbe+时间段+before+(一般现在时)...a.

Itiskind(bad,

brave,

careless,

clever,

cruel,

foolish,

good(好心的),

honest,

horrible,

kind,

lazy,

modest,

naughty,

nice

(有教养的),

polite,

rude,

silly,stupid,

wise,

wrong

(错误的))

(ofsb.)todosth.

此处adj.通常为描述人的形容词三.it作形式主语it充当形式主语

，本身无意义，其真正的主语通常是不定式短语，动名词短语以及主语从句。

1.真正的主语是todosth.b.

Itisnecessary(important,

necessary,

natural,easy,

safe,

common,normal,

hard,

difficult,

dangerous,

unusual,

rare,

impossible,

pleasant)(

forsb.)todosth.

此处adj.通常为描述事件的形容词e.g.Itisimportantforhertocometotheparty.c.

Ittakessb....todosth.sometime该句型中的不定式是真正的主语，it是形式主语，句型中的直接宾语是时间，常译为：做......要花费某人....e.g.我花了半个小时完成了英语作业。

IttookmehalfanhourtofinishmyEnglishhomework.d.Itisagoodidea(one’sturn等名词)

todosth.e.g.It’sourturntohostthemeeting.

Itisagoodidea

tohaveagoodrestbeforethetest.2.真正的主语是动名词结构It'snogood/use

doing…It'sgreatfundoing...It's（well）worthdoing…It's（well）worthwhiledoing/todoe.g.Itisnouse

cryingoverspiltmilk.

Itisfun

workingforhim.Isit

worthwhile

quarrellingwithhim?

3.真正的主语是从句.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，可能，肯定的是...）e.g.Itisveryclearthathe’sroundandtall

likeatree..Itisimportant(necessary,right,strange,natural...)

that...该句型和上一个同属一个句型，that后的从句要用虚拟语气(shoulddo),should可以省。e.g.

Itisimportantthatwe(should)learnEnglishwell.

Itisnecessarythathe(should)rememberthesewords..Itissaid(reported,learned...)that...

据说（据报道，据悉……）e.g.ItissaidthathehascometoBeijing.⑷.Itissuggested(ordered/demanded/insisted/commanded...)that...

据建议；有命令……e.g.Itwasorderedthatwe(should)arrivethereintwohours.⑸Itisapity(ashame...)that...竟然……该句型中，that后的从句一般用虚拟语气should+动词原形（should可省去）,表示出乎意料。没有这种意义时，则不用虚拟语e.g.Itisapitythatsuchathing(should)happeninyourclass.这种事竟然发生在你们班上，真是遗憾！e.g.Itisapitythatheisill.⑹Ithappens(seems,looks,appears)that...碰巧……；看来……该句型中it是形式主语，that引导的是主语从句，主句中的happen,seem等词是不及物动词．e.g.Ithappened(sohappened)thathemethisteacherinthestreet.

Itseemsthathewillbebackinafewdays.⑺Itisnowonderthat…难怪……该句型中it是形式主语，that引导的是主语从句。e.g.Itisnowonderthathedidn'tattendthemeeting.Translation:1.真奇怪,这部电影过去没有引起人们的兴趣。2.他这么快就适应了新环境,真是个奇迹。3.碰巧,你的裤子合他的身。4.据说很多青少年沉迷于游戏。

Itisstrangethatthemoviedidn’tappealtopeople.Itisawonderthathehasadaptedtothenewenvironmentsosoon.Ithappenedthatyourtrousersfittedhim.

Itissaidthatmanyteenagersareaddictedtogames.B.也可能是wh-词引导的Itdoesn’tmatterwhether(if)...不论（是否）……没关系……该句型中whether(if)引导的从句是真正主语。e.g.Itdoesn’tmatteriftheyareold.e.g.Itdoesn’tmatterwhetheryouare

accustomedtothestyle.b.Itis+nounphrasewh-…e.g.Itisstillaquestionhowmanypeople

aretocome.

ItisnobusinessofyourswhereIspend

mysummer.c.其它:e.g.Itremainstobeseenwhetheritwilldo

usharmorgood.四.it作形式宾语1.Sb.+think,believe,make,find,consider,feel+it+adj./n.

todosth.

+

doingsth.

that…该句型中的it做形式宾语。为了记忆方便我们可称该句型为"6123结构"。a.Wethinkit

ourdutytocleanourclassroomeveryday.b.Hefeltit

importantlearningEnglishwell.c.Theyfoundit

difficultthattheywouldfinishtheirworkintwodays.

五.it用于强调句1.Itis+被强调的部分+that/who…该句型是强调句型。强调的是人时，可以用who/whom代替that.e.g.ImetTomintheparkyesterday.宾语：地点：时间：

ItwasTomthat/who/whomImetintheparkyesterday.ItwasintheparkthatImetTomyesterday.ItwasyesterdaythatImetinthepark.2.Itisnotuntil+被强调的部分+that…该句型是强调句型。主要强调时间状语，译为“直到…才…”,可以说是not…until…的强调形式。e.g.Shedidn’tgotobeduntilhisfathercameback.

Itwasnotuntilhisfathercamebackthat

shewenttobed.e.g.

ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousstar.1.Itisalmostfiveyears______wesaweachotherlasttime.

A.beforeB.thatC.sinceD.when2.Itwasnotuntilnearlyamonth______Ireceivedthemanager’sreply.

A.since B.whenC.asD.that3.—

DidJackcomebackearlylastnight.

—

Yes.Itwasnotyeteighto’clock______hearrivedhome.

A.beforeB.whenC.that D.until4.

___wasin1979___Igraduatedfromcollege.A.That;that B.It;thatC.That;whenD.It;when5.Iwasdisappointedwiththefilm.Ihadexpected____tobemuchbetter.

A.it B.one

C.that D.them6.—

What’sthepicture?

—______amapofChina.

A.Thisis B.That’s

C.It’s D.There’s7.Nomatterwhereheis,hemakes________aruletogoforawalkbeforebreakfast.A．him B．thisC．that D．it8.Thefactthatshewasforeignmade________difficultforhertogetajobinthatcountry.A.so B.much C.that D.it9._______doesnotmatterifweliveashortlifeaslongaswehavebeenlivingameaningfulone.A.This B.ItC.One