高中英语课件-it的用法 18页

Grammar:theuseof"It"\n形式宾语Thechairmanthought___necessarytoinviteProfessorSmithtospeakatthemeeting.A.thatB.itC.thisD.himBSentencepatterns:1.S+think+it+necessary+(forsb.)todosth.…findfeel……possibleimportant…\nIthinkitourdutytocleantheblackboard.Sentencepatterns:2.S+V+it+one’sduty+(forsb.)todosth./clause…aruleanhonour…3.S+V+it+nogood+doingsth.nouse\nIlike___intheautumnwhentheweatherisclearandbright.(04全国)A.thisB.thatC.itD.oneC点拨:这是it作形式宾语的一种特殊用法.少数动词(如like,love,enjoy,dislike,hate,appreciate等)或包含介词的动词短语(如seeto,dependon等)后接宾语从句,必须先由it担任形式宾语,再接从句.Sentencepatterns:Ilike(enjoy,hate…)itwhen….Iwouldappreciateitif……seeto(depend/relyon…)itthat……takeitforgrantedthat…\n1.IfounditveryinterestingtostudyEnglish.我发现学英语非常有趣。2.Ithinkitnousearguingwithhim.我认为和他争吵没有用。3.Hemadeitclearthathewasnotinterestedinthissubject.他非常清楚地表示他对那门学科不感兴趣。\n形式主语…possible1.Itis/was+adj.necessary+(forsb.)todosth./clauseimportant……one’sduty2.It+is/was+n.one’shope+clause/(forsb.)todosth.anhonour……said3.Itis/was+known+that-clausebelieved…\n1）Itis+adj.+that从句①Itisclear(obvious，true，possiblecertain....)that.....“清楚（显然，真的，肯定．．．）”显然地，他受了严重的伤。Itisobviousthathegotbadlyinjuried.②.Itisimportant(necessary，right，strange，natural...)that...从句中要用虚拟语气（should+动词原形）在英语学习中我们必须记住语法结构Itisnecessarythatwe(should)rememberthegrammarrulesinlearningEnglish\n2）Itis+v-ed+that从句①Itissaid(reported/said/hoped....)that...人们普遍认为必须采取有效措施来保护环境Itisgenerallyacknowledgedthateffectivemeasuresmustbetakentoprotecttheenvironment②.Itissuggested(ordered/demanded/insisted/commanded...)that...从句要用虚拟语气（should+动词原形）有人建议推迟会议Itissuggestedthatthemeetingshouldbeputoff.\n3）.Itisapity(ashame...)that...that从句一般用虚拟语气（should+动词原形）should表示出乎意料，常译为“竟然”，可省去。没有这种意义时，则不用虚拟语气。这种事竟然发生在你们班上，真是遗憾！Itisapitythatsuchathing(should)happeninyourclass.他生病了，真遗憾！Itisapitythatheisill.4).①Itistime(abouttime，hightime)that...该句型中that后的从句应该用虚拟语气我们是该珍惜时间了Itistimethatweshouldtreasuretime.\n②Itisthefirst(second...)timethat(现在完成时）Itwasthefirst(second…)timeth（过去完成时）这是我第一次尝试这做这个实验ItisthefirsttimeIhaveattemptedtoperformtheexperiment.5).Ithappens(seems/appears)that...昨天在街上他碰巧遇到他的老师Ithappenedthathemethisteacherinthestreetyesterday.\n6.Itdoesn’tmatterwhether...Itmatters(tosb)that…该句型中whether/that引导的从句是真正主语，该句型常译为　“不论（是否）．．．没关系．．．/…是重要的。对我们而言重要的是要充分利用每一分钟,Itmatterstousthatweshouldmakefulluseofeveryminute.\nIt的其他重要结构Itis+被强调部分+that...是在他的帮助下我才康复ItwaswithherhelpthatIrecovered注意：Itisnotuntil+被强调部分+that...直到他取下墨镜我才意识到她是著名的影星。ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.=NotuntilshetookoffherdarkglassesdidIrealizeshewasafamousfilmstar.\n2.Itis+一段时间+since...。since引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。他父亲去世已有5年了3.Itis...when...。该句型中的when引导的是一个时间状语从句他是五点来这里的。Itis(hasbeen)5yearssincehisfatherdied.Itwas5o’clockwhenhecamehere.\n4.Itbe...before...该句型主句中的it指时间，主句中的时态常是将来一般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。要不了多久他就完成了工作Itwillnotbelongbeforehefinisheshisjob.5.Ittakessb....todosth.建造长城花了人们很多年时间IttookthousandsofpeoplemanyyearstobuildtheGreatWall.\n在一些固定用法中考查常见的固定用法有:makeitforgetitbelieveitornotDon’tmentionitItdoesn’tmatterIt(That)dependsGotitIt’shardtosayIt’suptoyoutodosth.takeit/thingseasy成功，做到，赶上等别提了，忘了它吧信不信由你别提了，表示不用谢没关系视情况而定明白了，懂了很难说由你来决定做某事不要慌，别担心，沉住气\n1.吸烟危害健康，这是事实。Itisafactthatsmokingdoesharmtohealth.2.碰巧我们在同一间大学。Ithappensthatweareinthesamecollege.3.一旦你吸烟上了瘾,你会发现要把它戒掉很难。(addict...to;tough)Onceyouareaddictedtosmoking,youwillfindittoughtogiveitup.\nItseemsstrangethatthemanwhohaddelevopedcommunismshouldhavelivedanddiedinLondon.4.这似乎是一件怪事：这位发展了共产主义的人竟然在伦敦生活过，并且在伦敦去世。\nBye-Bye