it的用法一、it作指示代词【完成句子】用one，ones，it，that，those填空(1)—Ican'tfindmywatch.—Youhaven'tfound______？Ifyouwanttobuyanew______，Isuggestyoubuy______madeinChina.(2)We'vegotabigcupandtwosmall______.(3)Theweightofanelephantismuchgreaterthan______ofatiger.(4)Thebooksonthefirstshelfareeasierthan______onthesecondshelf.(5)Theboytoldhisstoryand______ofthegirlupstairs.【答案】(1)it;one;one(2)ones(3)that(4)those/theones(5)that/theone【结论1】①指代上文提过的事物时，it指的是同名同物，相当于the＋名词；②one指的是同名异物，表示单数可数名词相当于a＋名词；a/an＋形容词＋one等于a/an＋形容词＋名词；复数形式用ones；③that后面常有后置定语，有特指意义，代替不可数名词或单数可数名词，相当于the＋名词；④复数名词用those，相当于theones。【例句观察】—Someoneisknockingatthedoor.Whoisit?—ItmustbeLeo.Hesaidhe'dcometoseeme.【结论2】it指代人时，常指小孩或身份不明的人。【例句观察】It'stooquietintheroom.Everyonejustkeepssilent.【结论2】it可用以指代环境或情况。【完成例句】根据语境补全句子(6)—Whattimeisitnow?—It'shalfpastseven.(7)—Itisspringnowandit'swarmthesedays.【结论4】it可用以指代时间、季节、天气或距离。【注意】it指代时间时，有如下一些句型：(1)Itistimeforsth.(forsb.)todosth./that－从句(shoulddo/did,必须用虚拟语气)例：①It'stimeforlunch.②It'stimeforustocleanthehouse.③It'stimethatweshouldcleanthehouse.＝It'stimethatwecleanedthehouse.(2)Itis/hasbeen＋sometime＋since－从句(从句用一般过去时)(3)It/Thisisthefirst/second…timethat－从句(必须使用现在完成时)这是某人第……次做了某事。It/Thatwasthefirst/second…timethat－从句(必须使用过去完成时)例：①ItisthesecondtimethatshehasvisitedtheGreatWall.②ThiswasthefirsttimethatIhadcomelatetoschool.(4)Itwas＋时间点＋when－从句例：Itwaseveningwhenwegothome.＝Itwaseveninginwhichwegothome.(5)Itwas/willbe＋sometime＋before－从句例：①过了5年他们才从北大毕业。ItwasfiveyearsbeforetheyfinallygraduatedfromBeijingUniversity.②不久，我们就要从我们学校毕业了。Itwon'tbelongbeforewegraduatefromourschool.二、it作形式主语【完成例句】根据语境补全句子(8)Itispossibleformetomakeatouraroundtheworld.【结论】代替由不定式、动名词或从句所表示的真正主语。为平衡句子，通常把不定式作主语改为it作形式主语。三、it作形式宾语【例句观察】①Howdiditcomeaboutthatsomanypeoplewereattacked?②Shefeelsithardtogetintouchwithheroldfriend.③Mobilephonesmakeitpossibleforustokeepintouchanywhere.④Ihavemadeitaruletogetupearly.【结论1】①it可以用在某些固定句型中，例如：Howdiditcomeaboutthat－从句意为“……怎么发生的？”②it作形式宾语常用结构有：代替由不定式、动名词或从句所表示的真正宾语。常见结构有：主语＋think/consider/find/feel/make/believe/regard＋it＋adj./n.(forsb.)todo.【例句观察】IconsideritnogoodchattingwithstrangersthroughtheInternet.【结论2】主语＋think/consider/find/feel＋it＋nogood/usedoingsth.【例句观察】Ihateitwhenpeoplespeakwiththeirmouthsfull.【结论3】主语＋hate/dislike/love/like＋it＋when－从句，表示对某一情况的喜好或厌恶。【例句观察】Ireallyappreciateitifyoucouldhelpmewithmymath.【结论4】主语＋appreciate＋it＋if－从句【例句观察】①Youmustseetoitthatthedoorsarelockedbeforeyouleavethelab.②Youcandependuponitthatwewon'tgiveup.③Ianswerforitthatsheisanhonestgirl.【结论5】主语＋seeto/answerforit＋that－从句(确保……)主语＋dependonit＋that－从句(指望，确信……)四、带it的一些固定词组1．(You've/I've)gotit.懂了，明白了2.Forgetit.算了吧，别在意，没关系。3.takeiteasy别着急，慢慢来；别过于...
