It-句型归纳总结

It句型归纳总结I．It作形式主语的句型①It+be+adj(kind,wise,careless,clever…)+ofsbtodosthEg:Itiswiseofhimtomakesuchadecision.他做出这样的决定是明智的。②It+be+adj(easy,safe,common,normal…)+forsbtodosth该句型中adj若为important,necessary,natural,possible,strange,vital,essential等可改为从句,从句用should+动词原形。.Eg:It’sverydangerousforchildrentoplaywithfire.ItisimportantforustolearnEnglishwell.(=Itisimportantthatwe(should)learnEnglishwell.)It+be+V-ed(reported,believed,said,suggested…)+that从句该句型中：⑴若V-ed为reported,believed,said等常译为“据报道”，“据认为”，“据说”。⑵若V-ed为suggested,ordered,demanded,insisted等表示“建议”,“命令”的词，从句要用虚拟语气(should)+动词原形。Eg:Itissuggestedthatthebook(should)berevised.It’ssaidthatTomhasbeenbackfromabroad.(=Tomissaidtohavebeenbackfromabroad.)It+be+n(apity,ashame,afact,goodnews…)+that从句:

该句型中，从句一般用(should)+动词原形，表示出乎意料，常译为＂竟然＂。

Eg:Itisapitythatsuchathing(should)happeninyourclass.

这种事竟然发生在你们班上，真是遗憾！Itisuseless/nouse/nogood+doingsth此句型中的it是形式主语,其后的动名词短语是真正的主语,译为“做…没有用”。Eg:Ituselessarguingwithhimfurther.It’snousetalkingwithhim,becausehewon’tlisten.⑥Ittakessb....todosth.该句型中it是形式主语，真正的宾语是todosth，常译为＂做．．．要花费某人．．．＂。Eg:IttookthousandsofpeoplemanyyearstobuildtheGreatWall.II．It作形式宾语的句型1.sbfind/believe/think/feel/consider/make+it+n/adj+todo或从句该句型中的it作形式宾语。为了记忆方便我们可称该句型为“6123结构”。6指主句中常用的动词：think,believe,make,find,consider,feel；1指的是形式宾语it；2指的是宾补的两种形式：形容词或名词；3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。Eg:Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.Theyfounditdifficultthattheywouldfinishtheirworkintwodays.2.主语＋hate/dislike/love/like＋it＋when－从句Eg:Ihateitwhenpeoplespeakwiththeirmouthsfull.3.主语＋appreciate＋it＋if－从句Eg:Ireallyappreciateitifyoucouldhelpmewithmymath.4.sb.dependon/counton/relyon/seeto(负责，确保)/answerforitthat…Eg:Youmayrelyonitthathewon’tbelate.Youmustseetoitthatthedoorsarelockedbeforeyouleavethelab.5.sb.takeitforgrantedthat…认为……是理所当然的Eg:Itakeitforgrantedthathewillsucceed.III.It引导的时间句型It+is+时间段+since引导的时间状语从句:

该句型中从句一般用过去时态，句意为“自从......以来已多久了”Eg:Itis5minutessincethebusleft.公汽开走已有5分钟了It+be+时间段+before引导的时间状语从句:该句型中，主句谓语动词be若为肯定式，意为“过多久才......”；若为否定式时，意为“没过多久就......”。Eg:Itwillbe3hoursbeforehecomesback.要过三个小时他才会回来Itwas3hoursbeforehecameback.过了三个小时他才回来It+be+时间点+when引导的时间状语从句这个句型中,it代指时间，表示时间点的词前没有介词。Eg:ItwillbeMondaywhenhecomesback.他周一的时候回来.ItwasMondaywhenhecameback.他周一回来的.对比：ItwasonMondaythathecameback.(强调句)It+is(about/high)time+

(that)sbdid/shoulddosth意为“该是某人做…的时候了”，about/high是用于加强语气，that从句用should或动词一般过去时表虚拟。亦可转换成It+is+time+(forsb)todosth.Eg:It’s(high/about)time(that)wehandedin/shouldhandinourhomework.It/This/That+is+thefirst(second…)time+thatsbhasdonesth:意为“这是某人第…次做…”，注意time前有序数词，主句是is时，从句要用现在完成时；如果主句用was，则从句须用过去完成时。Eg:ItisthethirdtimethatIhaveseenthefilm.ThatwasthesecondtimethatIhavebeenthere.IV．It引导的强调句☆强调句形式：It+is/was+被强调的部分+that/who从句Eg:ItwaslastweekthatImetanoldfriendinthestreet.Itwasbecausehewasillthathedidn'tcometoschoolyesterday.(强调原因状语从句时，只能强调由because所引导的从句.)☆判断方法：将Itis/was和that去掉，若该句是一个完整无缺的句子即为强调句.☆常考考点：①强调句型中的主谓一致Eg:Itisyou，ratherthanhe，thataretoblamefortheaccident．②插入从句的强调句型Eg:ItwasintherestaurantwherewehaddinnerlastSundaythatyouleftyourwallet．③强调句型的一般疑问句、特殊疑问句形式一般疑问句：Is/Wasit+被强调部分+that+句子其余部分?Eg:Wasitin1933thattheSecondWorldWarbrokeout?特殊疑问句：疑问词+be+it+that+句子其余部分?Eg:Whenwasitthathechangedhismindtotakepartintheactivity？④强调句型用于名词性从句,尤其注意要使用陈述语序。Eg:Idon’tknowwhenitwasthathechangedhismindtotakepartintheactivity？⑤notuntil用于强调句型Itis/wasnotuntil＋被强调部分＋that＋其他部分Eg:Itwasnotuntilmidnightthatshewentbackhome.此句型只用until，不用till。但如果不是强调句型，till和until可通用。因为句型中Itis/wasnot...已经是否定句了，that后面的从句要用肯定句。V．It其他常见用法：Itlooks/appearsasif...看起来好像……Itseemsthat...似乎……Itturnsoutthat...原来是……Itoccursto/strikessbthat…突然想到……Ithappenedthat...碰巧……Itdoesn’tmatterwhether/if…无论是…没关系Itisnowonderthat难怪…Italldepends/thatalldepends.那得看情况It'suptosb.由……决定，由……负责，取决于……asitis(1)事实上，实际情况是……;(2)照原样makeit成功、做到、说定Believeitornot.信不信由你Howdiditcomeaboutthat…“……怎么发生的？”完成句子巩固练习：Iwasabouttogototheairportwhen____________________thatIhadleftmypassportinthelivingroom.(occur)我刚要出发去机场，这时我突然想起我把护照落在起居室了。Youhavenoidea_______________________totakeeverychancetolivelifetothefullest.(how)你不知道，充分利用一切机会让自己的生活更加充实，这对我们来说有多重要。________________________ChinasuccessfullysentupShenzhou-8intospace?(when)中国究竟是什么时候成功发射了神舟八号的？ItwasthefirsttimethatI________________,anyhow,Iwasconfidentofmyself.(undertake)这是我第一次承担如此重要的任务，但不管怎样，我对自己有信心。_________________________thatwe’llhaveathree-dayholidaynextmonth.(announce)已经宣布，我们下个月将会有一个三天的假期。Ithasbeentenyears____________________________.(join)自从他参军以来已经有十年了。Eachnewwayoflookingatasituationimprovesourunderstandingand________________todiscovernewpossibilities.(make)每种看待事物的方式都提高我们的理解力并且使得发现新事物更容易。Theprofessordoesn’tknow__________________________themedicinecanbetestedonhumanpatients.(before)教授不知道还要多久才能将这种药在病人身上试验。______________________howmanyofthesenewtechnologieswillbecomereality.(remain)究竟有多少新技术将成为现实还有待观察。10.Itwasinthevillagewhereyouoncelived__________________(happen)这起事故就发生在你曾经生活过的村庄。Theinformationtechnologyisdevelopingsofast___________________whatcomputerscandointhenext20years.(predict)信息技术发展如此之快，以致于难以预测电脑在今后20年里能做些什么。Heisdiligentandworksefficientlyand________________hestandsoutineverysubject.(wonder)他学习勤奋，而且效率高，难怪他门门学科表现突出。Youmay_______________Iwillcometoyourassistancewheneveryouareintrouble.(rely)你可以相信，无论什么时候只要你有困难，我都会来帮你。MyEnglishteachersuggested__________________tolistentoEnglishprogrammeshalfanhourbeforegoingtobedeveryday.(rule)我的英语老师建议我养成每晚睡觉前听半个小时英语节目的习惯。15. Youcanthathewillneverdoanythingthatisharmfultoourfriendship.(depend)你可以放心，他绝不会做任何对我们的友谊有害的事情的。16.Youmustallthelightsareturnedoffbeforeyouleaveyourclassroom.(see)你必须确保在你离开之前所有的灯都关掉了。17.thatremovedthebronzestatuefromthesquareof是谁从St.Petersburg广场移走铜像的？18.Itwasthecomputerthatbrokedownhalfwayforthelossofallmyfiles.(blame)是半路抛锚的汽车该为我所有文件的丢失负