人教版英语选修六高二-unit3-语法-Grammar—-it的用法(1)

Section_ⅢGrammar—it的用法(1)语法图解探究发现①ItisabeautifuldayhereandIamsittingunderthebigtreeattheendofthegarden.②Yourmothertellsmethatyoustartedsmokingsometimeagoandnowyouarefindingitdifficulttogiveitup.③Itisnevertoolatetomend.④Itisnousetalkingtothem.⑤Itissaidthathestolethemoney.⑥IthinkitdifficulttolearnEnglishwell.⑦Wemakeitclearthatspeakingtotheteacherinthatwayisnotpolite.⑧Idon'tlikeitwhenpeopletalkwiththemouthfulloffood.[我的发现](1)①句it表示天气，②句第一个it代替to_give_it_up作形式宾语；第二个it代替句中所说的“吸烟”的事。(2)在句③④⑤中it用作形式主语，其中句③用在“Itis＋形容词＋(for/of＋sb.)＋动词不定式(短语)”中，it指代动词不定式(短语)；句④用在“Itis＋nouse/good＋动名词(短语)”中，it指代动名词(短语)；句⑤用在“Itis＋said/believed/reported＋that从句”中，it指代that从句。(3)在句⑥⑦⑧中it用作形式宾语，其中句⑥用在“动词＋it＋形容词＋动词不定式(短语)”中，it指代动词不定式(短语)，句⑦用在“动词＋it＋形容词＋that从句”中，指代that从句；句⑧it用在某些特殊的句式中，指代when从句。一、it用作人称代词和非人称代词1．用作人称代词(1)it用来指代前面的名词或前面提到过的事。Myfriendofferedmeabeautifulgiftyesterday,andIlikeitverymuch.我朋友昨天给了我一件漂亮的礼物，我非常喜欢。(2)指代性别不明的child或baby。Hissisterhasgivenabirthtoababyrecentlyanditisverybeautiful.他姐姐最近生了个孩子，很漂亮。(3)指代未出场的身份不明确的人。—Whoiswaitingforyouatthebusstop?—Ihavenoidea.Itmaybemybrother.——谁在车站等着你？——不知道，可能是我哥哥。(4)替代前文中的this,that。Thisisyourplan?Willyouhanditin?这是你的计划？你要交上去吗？2．用作非人称代词it用作无人称的主语，不指物，而表示时间、天气、气候、季节、距离等自然现象，或指事物的状态。Itisafinedaytoday,isn'tit?今天是个好天气，对吧？Itisfivekilometerstothetownfromthevillage.从农村到城镇有10里路。It'steno'clock.十点钟了。[即时演练1]匹配下面it的用法A．指代前面的名词B．指代性别不明的child或babyC．指代未出场的身份不明确的人D．时间E．距离①—Who'sthatatthedoor?—Itisthemilkman.__C__②Qingdaoisabeautifulcity,isn'tit?__A__③Thebabyiscrying.Itmightbehungry.__B__④WhatalongwayitisfromBeijingtoLondon!__E__⑤Itwasnearlymidnightwhenshecameback.__D__二、it用作形式主语it常代替由不定式、动词的­ing形式或从句表示的真正主语，作形式主语，而将真正的主语移至句子的后面。1．代替不定式短语作形式主语Itisimpossibletogettherebyboat.坐船不可能到那里。It'sverykindofyoutohelpme.你帮助我真好。2．代替动名词短语作形式主语常用于以下结构中：It'snouse/nogood/nofun/useless/awasteoftimedoingsth.做某事没有用/没有好处/没有意思/没有用/浪费时间。Itisnousegivinghimsomeadvice.＝Itisuselessgivinghimsomeadvice.给他提建议没用。3．代替主语从句作形式主语Itisnecessarythattheworkshouldbedonewell.这项工作应该被完美完成是必须的。It'sapitythatIdidn'tthinkofitearlier.我没有早一点这么想真是遗憾。4．注意以下固定句型Itseems(ed)/appears(ed)that...似乎……It(so)happenedthat...碰巧……Itturns(ed)outthat...结果是……Itoccurredtosb.that...某人突然想起……Itissaid/reported/believed/hoped/well­known/suggested...that...据说/据报道/大家都相信/人人都希望/大家都知道/有人建议……Itsohappenedthattheticketsweresoldout.碰巧票都卖光了。Itoccurredtoherthatshemightadoptahomelesschild.她突然想到她可以收养一个无家可归的孩子。Itturnsoutthatthesituationisquiteserious.结果表明情况很严峻。[即时演练2]补全句子①(2015·四川高考满分作文)IbadlyneedtoimprovemyoralEnglish,soit_is_great_for_me_to_findanativespeakertolearnfrom.我急需提高我的英语口语，因此对我来说找到一个可以向他学习的当地人真是太好了。②(2014·重庆高考满分作文)It_is_true_thatasmartphoneplaysanimportantroleinourdailylife.真的，智能手机在我们日常生活中扮演重要的角色。③It_is_no_use_tryingtosolvetheproblembyforce.Peacetalksaretheonlysolution.试图用武力解决问题是没用的，和谈才是唯一的办法。④It_was_said_thatthetyphoonhadcausedalotofdamage.据说台风已造成了很多的破坏。三、it用作形式宾语it常可代替不定式(短语)、动名词(短语)或从句在句子中作形式宾语，而将真正的宾语放在句子后面，it作形式宾语常用于以下几种情况：1．动词＋it＋形容词/名词＋(for/of)＋todo/从句Theyconsidereditimportanttohavetheworkdoneontime.他们认为按时完成这项工作很重要。Wemakeitaruletovisittheoldeveryweekend.我们规定每个周末都去拜访那些老人们。2．动词＋it＋nogood/nouse/useless/awasteoftime/worthone'swhile等＋doing...I'llmakeitworthyourwhiletellingmeabouthissecret.告诉我他的秘密，我会酬谢你的。Hethoughtitnousetryingtoconvincethem.他认为企图说服他们没有用。3．动词＋it＋介词短语＋that...oweittosb.that...把……归功于……takeitforgrantedthat...想当然/认为……是当然的Heowesittohisdoctor'scarethatheisquitewellagain.多亏医生的照料，他身体又好起来了。4．动词appreciate/hate/love/like/dislike后面接if或when引导的从句作宾语时，中间需用形式宾语it，构成“appreciate/hate/love/like/dislike＋it＋if/when从句”。Hewillappreciateitiftheywillinvitehim.如果他们邀请他，他将非常感激。Shehatesitwhenhebraggedthathewasthemostimportant.她讨厌他自吹自己最重要。[即时演练3]补全句子①Firstofall,Ithink_it_very_important_to_make_more_friendsabroad.首先，我认为在国外多交朋友是非常重要的。②(2014·山东高考改编)Susanmade_it_clear_to_me_thatshewishedtomakeanewlifeforherself.苏珊明确向我表明，她想为自己谋得一份新生活。③(2014·陕西高考改编)I'd_appreciate_it_ifyoucouldletmeknowinadvancewhetherornotyouwillcome.如果你能让我提前知道你是否能来，我会很感激的。④Ithink_it_no_use_arguingwithhim.我认为和他争论是没有用的。⑤Wealltake_it_for_granted_thatMilecansucceed.我们都想当然地认为米莱能成功。Ⅰ.单句语法填空1．Newtechnologieshavemadeiteasiertoenjoylifethaneverbefore.2．Youmaydependonitthattheywilllookafteryourdaughterwhenyouareaway.3．Fromtheteacher'spatientexplanation,Ihavelearntwhatabigresponsibilityitistoeducateus.4．—Haveyougotusedtotheweatherhere?—Yes.ButIdon'tenjoyitinthesummerwhenitrainsonend.5．IneedtobuyanewcellphonebadlybutIcan'taffordit.6．Iknowitisimportanttoknowmyownlimitations,butwhatisdifficultistohelpotherstoknowtheirownlimitations.7．Iwouldappreciateitverymuchifyoucouldgivemesomesuggestions.8．Itis_known(know)tousthatheisoneofthemostfamousfootballplayersintheworld.9．Itneveroccurredtomethatyoucouldsucceedinpersuadinghimtochangehismind.10．WillyouseetoitthatmychildrenaretakengoodcareofwhileIamaway?11．ItfeltfunnywatchingmyselfonTV.12．Thereisstillacopyofthebookinthelibrary.Willyougoandborrowit?Ⅱ.单句写作1．(2015·江苏高考满分作文)It_is_everyone's_responsibility_to_obeytherulestokeepthesocietyinorderandpeople'slivessafe.遵守规则让社会保持秩序、人民生活安定是每个人的责任。2．It_is_obvious_thatiPadi