2024秋高中英語Unit3AhealthylifeSectionⅢGrammar-it的用法Ⅰ學(xué)案含解析新人教版選修6

PAGEUnit3AhealthylifeSectionⅢGrammar——it的用法(Ⅰ)一、it用作代詞1．it用作人稱代詞：(1)指代前面的名詞或前面提到過的事；(2)指代性別不明的child或baby；(3)指代未出場的身份不明確的人。如：Myfriendofferedmeabeautifulgiftyesterday,andIlikeitverymuch.我摯友昨天給了我一件美麗的禮物，我特別喜愛。Hissisterhasgivenbirthtoababyrecently.Itissaiditisverybeautiful.他姐姐最近生了個孩子。據(jù)說孩子很美麗?！猈hoiswaitingforyouatthebusstop?—Ihavenoidea.Itmaybemybrother.“誰正在公共汽車站等你？”“我不知道?？赡苁俏腋绺纭！?．it用作非人稱代詞：(1)it可以表示天氣、時間、距離、自然現(xiàn)象、環(huán)境狀況等；(2)it也可以表示一般的、籠統(tǒng)的狀況。如：Itisafinedaytoday,isn'tit?今日是個好天氣，對吧？Itisfivekilometrestothetownfromthevillage.從村莊到城鎮(zhèn)有5千米的路。It'steno'clocknow.現(xiàn)在10點鐘了。Itistoobad.Thereismuchworkformetodotoday.糟透了。今日我有太多的工作要做。3．it可以指代指示代詞this,that或不定代詞something,nothing。如：Wheneversheseessomethingthatshelikes,shegoesandbuysit.每當她看到了喜愛的東西，她就會去買下來。二、it用作引導(dǎo)詞1．it在句中作形式主語：it作為形式主語常用于下面句型中：(1)Itbe＋adj.＋(forsb.)todo...(對某人來說)做……是……的。(常用于此句型的形容詞有possible,necessary,important,easy,strange,natural等)(2)Itbe＋n.＋doing...做……是……的。(常用于本句型的名詞有g(shù)ood,use等)(3)Itbe＋adj.＋doing...做……是……的。(常用于本句型的形容詞有useless,worthwhile等)(4)Itbe＋adj.＋that...(對某人來說)做……是……的。(常用于此句型的形容詞有necessary,important,strange,natural等)留意：此句型中從句一般用虛擬語氣，即(should)do。(5)Itbe＋過去分詞＋that...據(jù)……。(常用于本句型的過去分詞有said,announced,believed,reported,known,hoped等)(6)Itbe＋n.＋that...做……是……的。(常用于此句型的名詞有pity,honour,shame,wonder等)如：Itisimpossibletogettherebyboat.坐船不行能到那里。Itisnousegivinghimsomeadvice.＝Itisuselessgivinghimsomeadvice.給他提建議沒用。Itisnecessarythattheworkshouldbedonewell.這項工作應(yīng)當被完備完成，這是必要的。Itwassaidthatthetyphoon,Haiyan,hadcausedalotofdamage.據(jù)說臺風海燕已造成了很大的破壞。It'sapitythatyoucan'tcome.你不能來真缺憾。2．it在句中作形式賓語：it作為形式賓語常用于句型“動詞＋it＋形容詞/名詞/動詞-ing＋(forsb.＋)todo/that從句”中。常用動詞有think,believe,suppose,consider,feel,make,keep等。如：Theyconsidereditimportanttohavetheworkdoneontime.他們認為按時完成這項工作很重要。Wemakeitaruletovisittheoldeveryweekend.我們規(guī)定每個周末都去探望那些老人。Hethoughtitnousetryingtoconvincethem.他認為勸服他們沒有用。Ithinkitimportantthatyou(should)attendtheconference.我認為你去參與這個會議很重要。3．it的其他句型：(1)Itremainstobedone＋從句(真正的主語)……有待于……如：Itremainstobeseenwhethermakingatripoftendoesgoodtotheoldcouple'shealth.常常旅行是否對老年夫婦的健康有好處有待于證明。(2)It＋hits/strikes/occurstosb.＋從句(真正的主語)，某人突然想起……如：Itoccurredtomethatweshouldstartoffatonce.我突然想起我們應(yīng)當立即動身。(3)動詞appreciate/hate/love/like/dislike后面由if或when引導(dǎo)從句時，中間用it，構(gòu)成“appreciate/hate/love/like/dislike＋it＋if/when從句”。如：Hewillappreciateitiftheyinvitehim.假如他們邀請他，他將特別感謝。Shehateditwhenhebraggedthathewasthemostimportant.她厭煩他自吹自己最重要。(4)動詞短語rely/dependon/upon(依靠)，seeto(負責，照料)，answerfor(負擔，擔保)，askfor(懇求)后跟that引導(dǎo)的從句作賓語時，中間需用形式賓語it，構(gòu)成“動詞短語＋it＋that從句”結(jié)構(gòu)。如：Youcandependonitthatsheisalwaysconcernedaboutherowninterests.她總是關(guān)切自身的利益，對這一點可以打包票。Pleaseseetoitthatthedoorislocked.請確保門鎖了。(5)用于“動詞＋it＋介詞短語＋that從句”結(jié)構(gòu)中：takeitforgrantedthat...認為……天經(jīng)地義oweittosb.that...把……歸功于某人leaveittosb.that...把……留給某人keepitinmindthat...把……記在心里如：Heowesittohisdoctor'scarethatheisquitewellagain.多虧醫(yī)生的照料，他的病才好了。Keepitinmindthatyouhavetobehomeby11o'clock.記住，你必需在11點以前回家。Ⅰ.句型轉(zhuǎn)換(用it作形式主語)1．Weallknewthattheyhadbrokentheirpromise.→It_was_known_thattheyhadbrokentheirpromise.2．Ifyouwanttogiveupsmokinginashorttime,itwillbedifficult.→It_is_difficult_to_give_upsmokinginashorttime.3．Sinceyouhavespiltyourmilk,cryingoveritisuseless.→It's_useless/no_usecryingoverspiltmilk.4．Hehasmadeuphismind.Youneedn'ttrytopersuadehim.→It's_not_necessaryforyoutotrytopersuadehim.5．Theweakbabyisbecomingstrongerandstronger,whichmakeshisparentshappy.→Itmakeshisparentshappythattheweakbabyisbecomingstrongerandstronger.Ⅱ.單句語法填空1．Thishouseisbeautifulwithagarden.Wereallylikeitverymuch.2．—Ihaveanewcopyofthebook.I'dliketosendittoyou.—No,thanks.I'dratherbuyoneinthebookstore.3．I'dappreciateitifyouwouldliketoteachmehowtousethecomputer.4．Thedoctorthoughtitbetterforyoutohaveaholidaythantokeeponworking.5．Itneveroccurredtomethatyoucouldsucceedinpersuadinghimtochangehismind.6．Someoneisringingthedoorbell.Goandseewhoitis.7．It'snousecomplaining(complain)withouttakingaction.8．Thesoldiersfeelittheirdutytodefendtheirmotherland.9．Thisisnotmystory,norisitthewholestory.Mystoryplaysoutdifferently.10．Well,youmustn'tplayontheroad.Itisdangerous!Ⅲ.句型訓(xùn)練1．It_is_reported_that(據(jù)報道)therewasaseriousaccidentonthathighwaylastweekend.2．How_far_is_it(多遠)fromyourhometowntoBeijing?3．Keep_it_in_mind