-2024届高三英语二轮复习“it”的用法总结 课件

GrammarinUnit3---”it”考点一it用作代词1.用作人称代词（1）Myfriendofferedmeabeautifulgift,andIlikeit

verymuch.（2）Whatwillyoucallitifit’saboy?（3）---Whoiswaitingforyouatthebusstop?---Ihavenoidea.Itmaybemybrother.指前面的名词或上文提到的事指婴儿(性别不明)未出场的身份不明确的人2.用作非人称代词1.

Itgetsdarkveryearlyinthewinter.2.Ilovespring---It’sawonderfultimeoftheyear.4.It’slessthan100kilometresfromheretoJinan3.It

hassnowedmuchthisyear.指季节指距离指天气指时间5.Itistoobad.Thereismuchworkformetodotoday.指一般的，笼统的情况3.指代this,that或不定代词something,nonthing.Wheneversheseessomethingthatshelikes,shegoesandbuys

it.it作形式主语.

It可以用作先行词作为句子的主语,而把句子的真正语移到后面去,可以移到后面的主语是：不定式、动名词、从句不定式:e.g.知道自己的局限性是很重要的。Itisimportanttoknowyourlimitations.2)动名词:e.g.为他工作很有意思。Itisfunworkingforhim.3)主语从句:e.g.他居然还活着,真是个奇迹。Itisawonderthatheisstillalive. 考点二：用作形式主语It作形式主语时的几个常见句型:

(1).Itbe+adj.+(of/forsb.)+todosth.of

时此处adj.通常为描述人的属性的形容词:kind,unkind，nice,rude，cruel，considerate，thoughtful，careful，careless等。

e.g.It'skindofyoutohelpmewiththeproblem.for时此处adj.通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，legal，illegal，polite，impolite，clear，obvious，dangerous…e.g.Itisillegal（forateenager）todriveacarwithoutalicense.(2).Itbe+adj.+doingsth.(常用的adj.有useless,worthwhile)

e.g.Itisuselessaskinghimforhelp.(3).Itbe+n.+doingsth.(常用的名词有good,use,worth)e.g.It’snousecryingoverthespiltmilk.(4).Itbe+adj.+that...(常用的形容词有necessary,important,vital,strange,natural,clear,possible,obvious,true,certain等)e.g.Itisimportantthathe(should)bethereontime.(5).Itbe+done+that...(常用的过去分词有said,announced,believed,reported,known,learned,hoped,claimed,estimated等)e.g.Itwassaidthattheearthquakehadcausedalotofdamage.(6).Itbe+n.+that...(常用的n.有pity,honour,shame,wonder,fact等)

e.g.Itisapitythatyoucan'tcome.

it作形式宾语当复合宾语中的宾语是不定式、动名词、宾语从句时,往往把宾语放在它的补足语后面,而用it作形式宾语,放在宾语补足语之前。

Sb+make/think/believe/find/consider/feel+it+adj./n.+todo/doing/that….Wethinkitimportant

tolearnaforeignlanguage.Heconsidersithisdutytohelpthoseatrisk.Ithinkitnouse

arguingwithhim.Theschoolhasmadeitclearoverandoveragainthatsmokingisbannedintheschool.

考点三：用作形式宾语考点四：it的固定句型(1).Itremainstobedone+从句...有待于e.g.Itremainstobeseenwhethermakingatripoftendoesgoodtotheoldcouple'shealth.(2).It+hits/strikes/occurstosb+从句某人突然想起...e.g.Itoccuredtomethatweshouldstartoffatonce.(3).appreciate/hate/love/like/dislike后面由if或when引导从句时，中间用it,构成appreciate/hate/love/like/dislike+it+if/when从句e.g.Hewillappreciateitiftheyinvitehim.(4).动词短语+it+that从句。动词短语有rely/dependon/upon,seeto(负责，照料)，answerfor(负担，担保)，askfor(请求)。e.g.Youcandependonitthatsheisalwaysconcernedaboutherowninterests.(5).动词+it+介词短语+that从句takeitforgrantedthat...认为...理所应当oweittosbthat...把...归功于某人leaveittosbthat...把...留给某人keepitinmindthat...把...记在心里e.g.Keepitinmindthatyouhavetobehomeby11o'clock.IMaryinthestreetyesterdayItwasIthat/who

metMary

inthestreetyesterday.ItwasMarythatImet

inthestreetyesterday.ItwasinthestreetthatImetMaryyesterday.ItwasyesterdaythatImetMary

inthestreet.it用于强调句基本结构：Itbe+被强调部分+that/who+句子其他成分ImetMary

inthestreet

yesterday.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.强调句的一般疑问句：Is/Wasit+被强调部分+that/who+其他成分？e.g.Isitinthedininghallthattheywillholdaparty?IsitprofessorLiwhowillcometoourschooltogiveusaspeech?强调句的特殊疑问句：特殊疑问词+is/wasit+that/who+其他成分？e.g.Howwasitthattheygottothetopofthathighmountain?※：当强调句的特殊疑问词作宾语时，语序为特殊疑问词+itis/was+that/who+其他成分.e.g.Ireallydon'tknowwhereitwasthatIputmywalletafterIpaidthebill.强调句的特殊结构：当被强调的时not...until句型时，应将not与until部分一起进行强调，构成“Itis/wasnotuntil...that...”结构。由于not已经移除，that后应用肯定句式。如：1.Hedidn'tcomebackuntilthenextyear.

Itwasnotuntilthenextyearthathecameback.2.Theywillnotleavehereuntiltheyfinishtheproject.

Itisnotuntiltheyfinishtheprojectthattheywillleavehere.1.Itistime

(abouttime/hightime)

thatsb._______

did/shoulddo2.Itisthefirst

(second...)

timethat____________was3.It_____________+时间段....since…did自…以来已经过了