2026秋新人教版英语九年级上册教学课件：第一单元第4课时Section A 4a-4c 有微课视频

Unit1Thechangingworld第4课时(SectionA4a-4c)R·九年级上册WarmupWhattensesareusedinthissong?Let’sreviewReadthesentencesaboutchangesandfillintheblanks.He_______(become)agoodfriendofyourgrandfatherabout20yearsago.They_____________(not,see)eachotherforages!becamehaven’tseenWe_______(use)tohavetotravelfartoseeadoctor.Ourvillage_____________(build)anewhospital.usedhas(just)builtManypeople_______(use)toworkinbigcities.Now,moreofthem_____________(come)backtoliveandworkhere.usedhavecomeReadthesentencesandcircletheverbs.Payattentiontotheverbtenses.Hebecameagoodfriendofyourgrandfather20yearsago.Weusedtohavetotravelfartoseeadoctor.Manypeopleusedtoworkinbigcities.Theyhaven’tseeneachotherforages!Ourvillagehasjustbuiltanewhospital.Now,moreofthemhavecomebacktoliveandworkhere.4aWhendoweusethesimplepasttense?Whendoweusethepresentperfecttense?Review(时态复习)一般过去时和现在完成时的用法和区别时态定义时间标志词句式结构一般过去时与现在完成时的区别动词结构一般过去时一般过去时表示过去某个时间或某一段时间内发生的动作或存在的状态。定义nowPastfuture动词的过去式（did）动词结构一般过去时常见的时间状语有:

yesterday（morning/afternoon）（昨天……）、lastweek/month/year（上周/上个月/去年）、一段时间+ago（……前）、thedaybeforeyesterday（前天）、in+过去的年份（在……年）、justnow（刚才）when+从句时间标志词句式结构①含be动词的一般过去时的句式句式结构示例肯定句否定句主语+was/were+其他.主语+was/werenot+其他.Iwaslateforclassthismorning.Iwasn’tinterestedinmathslastyear.句式结构示例一般疑问句特殊疑问句Was/Were+主语+其他?Yes,主语+was/were.No,主语+wasn’t/weren’t.疑问词+was/were（+主语）+其他?—Wereyouathomeyesterday?—Yes,Iwas./No,Iwasn’t.Howwasyourschooltrip?①含实义动词的一般过去时的句式句式结构示例肯定句否定句主语+动词过去式+其他.主语+didnot/didn’t+动词原形+其他.Hevisitedasciencemuseumlastweek.Theydidn’tplaybadmintonlastnight.句式结构示例一般疑问句特殊疑问句Did＋主语+动词原形+其他?Yes,主语+did.No,主语+didn’t.疑问词+did+主语+动词原形+其他?—Didyougoswimmingyesterday?—Yes,Idid.Whatdidyoudothedaybeforeyesterday?注意：若对主语提问，则特殊疑问句的句式为“疑问词+动词过去式+其他?”。助动词have/has+过去分词现在完成时①表示过去发生或已经完成的动作对现在造成的影响或结果。②表示某一动作或状态从过去某一时间开始一直持续到现在，并有可能持续下去。定义nowPastfuture影响或结果构成现在完成时常见的标志词有:

already（已经），yet（还；已经），never（从不），ever（曾经），just（刚刚），sofar（到目前为止）for+时间段”或since+过去的时间点/从句时间标志词句式结构示例肯定句否定句主语+have/has+过去分词+其他.Ihavereviewedphysicsforthecomingexam.主语+haven’t/hasn’t+过去分词+其他.Ihavenotreviewedphysicsforthecomingexam.句式结构句式结构示例一般疑问句特殊疑问式

肯定回答:

Yes,主语+have/has.否定回答:

No,主语+haven’t/hasn’t.Have/Has+主语+过去分词+其他?—Haveyoureviewedphysicsforthecomingexam?—Yes,Ihave./No,Ihaven’t.疑问词（组）＋have/has＋主语＋过去分词＋其他?Whathaveyoureviewedforthecomingexam?现在完成时一般过去时用法标志词只表示过去的动作或状态，与现在无关表示过去发生的某一动作对现在造成的影响或结果，强调的是现在的情况常和already,yet,never,ever,just,sofar,since,for等连用常和yesterday,lastweek,justnow,twodaysago等具体的表示过去的时间状语连用一般过去时与现在完成时的区别练习：用括号内所给内容的适当形式填空。1.Haveyouever_________(try)ChinesefoodoutsideofChina?2.He__________(prefer)countrymusictopopmusicwhenhewasyoung.3.Thefilm_________(be)successfulwiththepublicsinceit________(come)out.4.Tony___________(have)thebikefortwoyears.Hisfather__________(buy)itforhisninthbirthday.5.Mysister___________(notsee)herfriendformonths.She__________(miss)hersomuchandwantstocallher.triedperferredhasbeencamehashadboughthasn’tseenmissesCompletetheconversationwiththecorrectformsoftheverbsinbrackets.4aA:______you______(be)tothenewlibraryyet?B:No,I____________(notknow)therewasanewlibrary.Whendidit______.(open)?A:It______(open)lastFriday.I______(go)therewithmygrandpaonSaturdaynight.B:______you______(like)it?A:Ofcourse!It’sthemosthigh-techlibraryI______ever______(visit).Havebeendidn’tknowopenopenedwentDolikehavevisitedB:Oh,what______you______(see)there?A:Therearesectionswithbooksaboutscienceand

Chineseculture,aswellasahugesectionwith

children’sbooks.Ialso______(read)somedigital

booksonthecomputer.Mygrandpa________(1isten)

tosomeaudiobooksbecausehecan’tseewell.B:Cool!I____________(bring)mylittlebrotherthere

tomorrow.didseereadlistenedwillbringCompletethepassagewiththecorrectformsoftheverbsinbrackets.Whyarelocalpeoplericherandhappierthanbefore?4cInthepast,it______(be)difficulttotravelinGuizhou.Inmanyplaces,thereusedto_____(be)nobridgestocrossmountainsandrivers,andmostroadswerejustdirttracks.This_______(make)itdifficultforlocalstobringproductstothemarketortodevelopindustry.wasbemadeIt’s+形容词(+forsb)todosth.(对某人来说)做某事是……的。dirt/dɜːt/[名词]泥土；尘土track/træk/[名词]小路；轨道Nowgreatchanges________(take)place.Thegovernment_________(build)thousandsofkilometresofhighways,railways,andwideroads.Ithasalsobuiltmanyhighbridgesandtunnels.Ajourneythatusedto________(take)adaynowtakesonlyafewhours.Asaresult,thelivesoflocalpeople________________(improve).Theyaremuchricherandhappierthantheyonce__________(be).havetakenhasbuilttakehaveimprovedweretakeplace发生；进行不及物动词短语，其后不接宾语。数以千计的；成千上万的隧道因此Whyarelocalpeopleric