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英语时态初中阶段应掌握的时态共有八种，即一般现在时，一般将来时，一般过去时，现在进行时，过去进行时,过去将来时，现在完成时，过去完成时现从结构，作用，时间状语三方面加以介绍•动词形式分五种.动词原形一.第三人称单数一.过去式一.过去分词一.现在分词12345动词形式用法及作用举例Flowers smellsweet.
1.动词原形词典、单词表所给词形，用于一般现在时They enjoydancing to the music.（主语为复数）及情态动词、助动词后You shouldbe morepolite.用于现在时单数第三人称其词尾变化规He isa16-year-old student.
2.动词原形+s/es则与名词复数变化规则相同She washesher handsseveral times.I wrotea booklast year.
3.动词过去式用于一般过去时态We were in GradeTwo in
2003.They hadmany testslast week.过去分词用于各种完成时态、被动语态其变化We havelearned nearly1600words.
4.分为规则和不规则两种He hadwritten8letters before
9.The classroomiscleaned everyday.
5.现在分词用于各种进行时态现在进行时、过去进You arelistening tome explaining.行时词尾以结尾-ING Hewas havingan examat8yesterday.般现在时主语+am,is,are+其它其结构为be动词肯定句主语+am,is,are+not+其它否定句Am,Is,Are+主语+其它？一般疑问句特殊疑问词+am,is,are+主语+其它？特殊疑问句二人称及第三人称复数时实意动词1）主语为第一,主语+动词原形+其它肯定句主语+don t+动词原形+其它否定句虹+主语+动词原形+其它？一般疑问句特殊疑问词+do+主语+动词原形+其它特殊疑问句主语+动词第三人称单数+其它肯定句主语+doesnt+动词原形+其它否定句Does+主语+动词原形+其它一般疑问句特殊疑问词+曲强+主语+动词原形+其它特殊疑问句表示现在的状态与特征；表示普遍真理其作用为表示习惯性，经常性的动作;2）主语为第三人称单数时其常用时间状语为ften,always,usually,sometimes,everyday week,year...,in themorningafternoon,evening等Ex.
1.she go to the library everySunday此题为习惯性动作，答案为Does,go.
2.They oftenswim insummer.此题为经常性动作，答案为swim.
3.be everyonehere此题表示现在的状态,答案为Is.
4.The earthtravel roundthe sun.此题表示普遍真理,答案为travels.
二、一般过去时其结构为be动词肯定句主语+was,were+其它否定句主语+was,were+not+其它一般疑问句Was,Were+主语+其它？特殊疑问句特殊疑问词+was,were+主语+其它？
40.C
41.B此两题思路与No
39.相同，均应考虑过去动作影响现在
42.B本题必须用过去时态，但没有迹象表明动作的先后顺序，所以选B不是Co
43.B本题必须用过去范畴，但有迹象表明动作的先后顺序，电影放映在先，人随后到，且电影开演不必用被动所以选B
44.D主句为祈使句，till引导时间状语从句要求用一般现在时
45.A Itis+时间段+since引导过去时为固定句型
46.A since引导时间状语从句，主句现在完成时,从句用一般过去时与上句的固定句式不同
47.C for前面应跟完成时和持续性动词get todo sth属于终止性动词搭配
48.B in during the last past+时间段用于现在完成时
49.B by then在这里理解为“届时”用于将来时
50.D本题不应见到具体时刻便选A应考虑到后面的过去完成时
51.B in+时间段用于将来时.D选项应为three dayslatero
52.A after+时间段用于过去时，若在将来时中应带具体时间点
53.B
54.A试比较这两题，虽问句相同但侧重点不同故答案不同
55.B sthbegin的持续性对应词为sth hashad been ono
56.B我到时他已去睡觉了而不是去睡过觉故选B
57.C本题用现在完成时询问是否完成某事，经肯定后再用一般过去时说何时完成的
58.D前一分句有twice表示去过，后一分句now,still表现在还想去
59.B说没看见应是谈话之前发生的，经提醒现已看见故选B不选C
60.D since+过去时间点用于现在完成时中，for后跟时间段
61.C for后跟时间段用于现在完成时问对方上哪去了说明对方已回来，即去过某地
62.B反意疑问句中附加问句部分是肯定形式，故前面应为否定
63.C has he部分说明应用现在完成时，而具体外出时间则在过去
64.C此时此地问人在哪里，回答为正在某地做某事下一步要做的动作用将来时
65.A have been in表示在某处居住或逗留了一段时间
66.B if引导条件状语从句主句是将来时，从句为一般现在时fine是形容词
67.C yesterday是一般过去时的时间状语
68.C How long不仅可与现在完成时连用，还可与现在时，过去时，将来时连用此题用排除法A为终止性动词，B为干扰项，D无迹象表明过去的过去
69.B buy是终止性动词其代替词是have
70.C当从句某一突然动作发生时，主句动作一直在持续，又在过去范畴故用过去进行时
71.B
72.D上面两题均为课文原句一题强调知识一直在不断增长，用现在进行时一题强调“记起”的内容发生在“记起”这一动作之前并要考虑转折的关系
73.C before引导的时间状语从句对于将要发生的事情也是主将从现
74.D last week是一般过去时的时间状语
75.A rightnow表现在
76.0道歉后应许诺将不会再做
77.D四个词中只有work是持续性，可与How long同时使用
78.C发生在过去的完成作业的动作，对现在造成可以欣赏音乐的结果
79.A姓氏前有the后有s,谓语动词应用复数形式，从句是由when引导的表示过去的时间状语从句，所以用过去进行时态
80.C hair是不可数名词，these days表现阶段的变化结果主语+动词过去式+其它实意动词肯定句否定句一般疑问句特殊疑主语+didn t+动词原形+其它问句地+主语+动词原形+其它？特殊疑问词+did+主语+动词原形+其它？其作用为表示过去的情况或过去习惯性动作其常用时间状语为yesterday,the daybefore yesterday,...ago,last...及其它表过去的时间,如in1998等.Ex.
1.Ithe numberdown on a pieceof papera momentago.A writeB writedC wroteD writing此题表过去的情况，且write为不规则动词，答案为C.
2.Everythingready beforeFather came.A were B was C isD are此题句中暗示为过去时，且everything后跟第三人称单数，答案为B.
3.He alwaysme lastterm.A helpedB helpsC helpingD help此题表过去习惯性动作，且help为规则动词，答案为A.
三、一般将来时主语+will be+其它其结构为be动词肯定句否定句一主语+will notbe+其它般疑问句特Will+主语be+其它？殊疑问句特殊疑问词+wi11+主语+be+其它？实意动词.肯定句否定句主语+will+动词原形+其它一般疑问句特殊疑问句当主语是第主语+won t+动词原形+其它一人称时，助动词可为Will+主语+动词原形+其它？特殊疑问词+wi H+主语+动词原形+其它shall.且若为疑问句只能为shall.其作用为:表示将来某个时间将要发生的动作或存在的状态.也可用主语+am,is,are+going todo+动词原形+其它来表示计划，打算或决定要做的事情对于很快就会发生的事，还可用进行时态表将来，但常局限于有位置移动色彩的动词，如go,come,leave等其常用时间状语为tomorrow,the dayafter tomorrow,next...,in+时间段及其它表将来的时间,如in2010等.Ex.
1.Hurry up,or youbelate.
3.What youdotomorrow
4.Theyhave6subjects nextterm.
5.I thinkit againlater in the day.A rainsB will going to rain Cis going torain D will be rainAwill yoube Bwill beyou Cyou will be Dwill yougoing to be
6.Where this time nextyear主语+am,is,are+现在分词+其他.
四、现在进行时其结构为肯定句否定主语+am,is,are+not+现在分词+其他.句一般疑问Am,Is,Are+主语+现在分词+其他？句特殊疑问特殊疑问词+am,is,are+主语+现在分词+其他句其作用为:表示说话当时正在发生的动作或现阶段正在进行的动作其常用时间状语为now,this week,these days等，也可是置于句首的Look,Listen.现在进行时也可表示最近按计划安排将进行的动作，常会有一个表将来的时间状语但仅限于少量词语，如go,come,leave,arrive等注表态度，情感的动词和感官动词不能用于进行时态like,know,want,hear等Ex.
1.They areplanting trees on the hill.（改为否定句）They arenot plantingtreeson thehill.
2.Tom iswriting aletter to his friend.（改为一般疑问句）Is Tomwriting aletter tohisfriend
3.I amgetting ready to run.（就划线部分提问）What areyou gettingreadytodo
五、过去进行时其结构为肯定句否定主语+was,were+现在分词+其他.句一般疑问主语+was,were+not+现在分词+其他.句特殊疑问Was,Were+主语+现在分词+其他？句特殊疑问词+was,were+主语+现在分词+其他其作用为表示过去某个时刻或时段正在进行的动作其时间状语为at thistime+过去时间at thistime yesterday,at that time,at+具体时间点+过去时间at9:00o,clock last night,from具体时间点to具体时间点+过去时间from7:00to10:00yesterday morningo过去进行时还可以与一般过去时搭配用于时间状语从句中强调动作延续时用过去进行时，强调动作瞬间发生时用一般过去时常用连词为when,while.Ex.
1.He notwork atthattime.wasn，t working.
4.When the teachercome in,theytalk loudly.came为瞬间发生的动作,were talking为持续的动作
5.Whatyouread lastnight如此题强调的是昨夜正在读什么，则答案为were,reaing如此题强调的是昨夜读了什么，则答案为did,read
6.Uis motherreturn whilehedohis homework.returned为瞬间发生的动作,was doing为持续的动作
7.My fatherwatchTVwhile my mothercook.was watching,was cooking两动词均为持续的动作while后的从句动词必须为进行时态若主句和从句均为进行时，连词必须为while.
六、现在完成时其结构为肯定句否定主语+have,has+过去分词+其它句一般疑问主语+have,has+not+过去分词+其它句特殊疑问Have,Has+主语+过去分词+其它？句特殊疑问词+have,has+主语+过去分词+其它其作用与时间状语1表示过去发生的动作影响到现在，常与already,yet,ever,never,just,before等副词连用2表示过去发生的动作持续到现在,常与表一段时间的时间状语连用如for+时间段，since+过去时间，提问用How long.此外，so far,induringthe lastpast+时间段也是该时态的时间状语现在完成时强调过去与现在的联系，而一般过去时只强调过去的动作，与现在无关在现在完成时的第二个作用中，必须使用持续性动词，故某些表瞬间的动词需要特定的转换形式如diehave been dead,openhave beenopen,closehave beenclosed,buyhave had,borrowhave keptarrive（in,at）,come（to）+a placehave been in+a place,leave+a placehave been awayfrom+a place,join+团体-----have been in+团体，have beena+团体成员等Ex.1How longhave you the bookAborrowed Bkept Clent Dbought答案为B因此处需要一个持续性动词
2.We each other sinceheA didn，t see,left Bhaven，t seen,has left C haven，t seen,left答案为C.因since的主句为现在完成时，从句为过去时
3.hewait foryou for an hourHas,waited
4.We justhaveour lunch.Have,had
七、过去将来时其结构为be动词肯定句否定句一般主语+would be+其它疑问句特殊疑问主语+would notbe+其它句Would+主语+be+其它？特殊疑问词+would+主语+be+其它？实意动词肯定句否定句一般主语+Would+动词原形+其它疑问句特殊疑问主语+wouldn t+动词原形+其它句Would+主语+动词原形+其它？注也可用was,were+going todo特殊疑问词+也逗+主语+动词原形+其它的结构来表示
5.So far,no manvisitthis village.has visited其作用为:表示从过去某时看将要发生的事情.此时态常用于主句是一般过去时的宾语从句中Ex.
1.Linda toldme that shego to the parkthe next day.would go
6.We didn，t knowwhen hearriveuntilhe calledus.would arrive
7.They askedif theyvisit thefarm by bus.were goingto visit
八、过去完成时其结构为肯定句否定主语+had+过去分词+其它句一般疑问主语+had+not+过去分词+其它句特殊疑问Had+主语+过去分词+其它？句特殊疑问词+had+主语+过去分词+其它其作用为过去某时之前已发生的动作或情况，即过去的过去，与现在无关此时态常用于1以by,before+过去时间,时间段+before,the week...before为时间状语的简单句中2主句为一般过去时的宾语从句中3与一般过去时搭配，用于when,after,before引导的时间状语从句中Ex.
1.We bethere twicebytheend oflast year.had been
2.They finishthework before
1998.had finished
3.He said he seethe filmthe weekbefore.had seen
4.The sunrisewhen hegot up.had risen
5.Yesterday,Ileave theclassroom afterIclean it.left hadcleaned现在完成时中，关于终止性动词与持续性动词的要求，在过去完成时中，依然适用EXERCISES
一、用所给动词的适当形式填空
1.I usuallyget up at six,but yesterdayI getup atseven,and tomorrowI getup ateight.
2.When I got there,you alreadystart playing.
3.She drawa horseat thistime yesterday.
4.We study in thisschool for3years.
5.If itnot raintomorrow,they gofishing.
6.Lily saidthatsheput on the newdress the nextday.
7.How many times thegirlsee the film sincelast year
8.Jack collectmore thantwo hundredChinese stamps.
9.By theend oflast month,heteachus fourEnglish songs.
10.The doctorsoperateonthesick boynow.
11.My brotherspeakFrench well.
12.There bea volleyballmatch onthe playgroundtomorrow afternoon.
13.Look,the studentshave a physicslesson inthe lab.
14.When wearrive homeyesterday afternoon,the windblow hard.
15.We neverhear thestory ofMiss Evansbefore.
16.I notwrite tomy friendMike fora long time.
17.Pleasenot openthe window.Itbe coldoutside.
18.Hurry up!Wewait foryou.
19.Listen!Someoneknock atthe door.
20.Do youknow ifhe comenext week
21.Soon theybuilda highway betweenthe twocities.
22.I justbuya dictionary.Ibuy itlast week.Now,I lookupaword init.
23.He finishjunior middleschool inJuly
1997.
24.Kate，s sisterplaythe pianowonderfully.
25.We didn，t getthe ticketsbecause ourteacher givethem alltotheother class.
26.it takeyou half an hourto finishyour homeworkyesterday
27.The teachertold us that wenot havea mathstest the next Monday.
28.the buscomeyet
29.These foreignfriendsbe tothe Great Wall twice.
30.Jim isn，t athome.He go tohisuncle，s.
31.“Mother,may Igo outand play”〃youclean yourbedroom”〃Yes,I doit fiveminutes ago.〃
32.The boyis nothungry.He havehis lunch.
1..I thinkthe suitfit mebefore longthough itnot fitme now.
34.As soon as therainstop,theygo outand playedhappily.
35.They callyou ina dayor two.
36.I tellher thenews assoon asshe comeback.I promiseyou.我答应你
37.Her auntstudyinGermany at thistimelast year.
38.youread thisbook No,but Iborrowone fromthelibrary.Would youliketo gowith me
39.Please keepquiet.Can，t yousee wetalk aboutsomething important
40.Our teacheroften workat nightbut sheusually goto workon time.
二、单项选择、填空
1.Where isKate She to England.B.has gone C.will beA.has been D.will gowhenhis motheropened thedoor
2.What heA.did,do B.had doneC.will doD.was,doing
3.How longthe manFor4years.D.has,beendead
4.She toldusthatshe A.thenextday.our factoryhadvisited B.was visited C.would visitD.will visitA.has,died B.did,die C.was,died
5.We notgotothe cinemaif itthis afternoon.A.will,will snowB.will,snows C.do,snows D.do,will snow
6.Mr Leesaidhenever toJapan.A.has,gone B.has,been C.had,gone D.had,been
7.The eartharound thesun all the year.D.will moveA.has movedB.moved C.moves
8.He hisbike,he hasto walkto school.A.lostB.loses C.has lostD.had lost
9.I waslatefor themeeting.When Ireached there,all thepeopleA.had leftB.has beenleft haspassed C.has left D.had beenaway
10.Two years since Iyouthe firsttime.A.meet B.have metC.met D.had met
11.I______in Beijingfor halfa yearnow.A.wasB.have comeC.had comeD.have been
12.When wetherailway station,the trainfor5minutes.A.got to,had beenaway Breached,had left.C.arrived,has beenaway arrivedat,has left
13.----we goand seeLiu Mingtomorrow----Good idea!He bevery pleased.A.Will,will B.Shall,will C.Shall,shall D.Will,shall
14.The storyin Londoninl
940.was happeningC.happens D.A.happened B.has happened
15.Look,the birdstowards thesouth.They_____tothesouth everyA.are flying,flies B.fly,are flyingyear.D.were flying,flew thebookC.are flying,fly
16.How longhave youA.bought B.borrowed C.keep D.had
17.I havethe USAfor twomonths.A.been toB.gone to C.been inD.went
18.We millionsof treesonthehills ina fewyears time.A.have plantedB.planted C.will plantD.plant
19.They afilm this evening.A.see B.are seeingC.shall seeD.are goingto see
20.My brothera Leaguemember forthree years.A.has beenB.has becomeC.has joinedD.was
21.He knewBeijing verywell becausehe theremanytimes.A.had beenB.went C.has beenD.was
22.His unclethe Armytwo years ago.A.joins B.joined C.has joinedD.has beenin
23.He____there already.A.arrives B.arrived C.has arrivedD.has been
24.Please tome assoon asyou there.A.write,get B.wrote,got C.writing,get D.write,will get
25.He somefriends andhe oftenthemduring hisstay inTokyo.A.has,visits B.has,visitedC.had,visited D.had,visits
26.How oftenyou tothepark whenyou werein TianjinA.do,go B.did,go C.will,go D.have,gone
27.What doyou dotomorrowA.want toB.goingtoC.goto D.like to
28.The studentsonafarm forten days.Then theyto afactory.Though theyback atschool,they stillremembered thosefamers andworkers.A.have stayed,went,wereB.had stayed,go,areC.have stayed,go,have beenD.had stayed,went,were
29.It Thursdaytomorrow.A.is goingto beB.will goingtobeC.wi11D.will be
30.I himsince welast metin
1998.A.don，t seeB.haven，t seenC.didn，t seeD.have seen
31.My motheroften clotheslast summer.A.wash B.washes C.washed D.is washing
32.He alwayslate forschool whenhe wasyoung.A.is B.wasC.will be D.were
33.He usuallyto schoolbybus.A.go B.went C.goes D.will go
34.Last summerI went to Beijingand therefor onemonth.A.have stayedB.stays C.stay D.had stayed
35.Last night,my fatherreading thebook forabout2hours.A.keeps B.had keptC.kept D.has kept
36.Do youknow thatsound muchmore slowlythan light.A.go B.went C.goes D.will go
37.As soonashehome,he willhaveabath.A.get B.will getC.gets D.is getting
38.He fellasleep whilehe abook.A readB wasreading Cis readingD hadread
39.Look,someone apicture onthe blackboard.How beautifulit looks!A.draws B.is drawingC.has drawnD.drew
40.Look atthe emptyroom.All theguests.A.are,leaving B.leftC.have leftD.will leave
41.Look,Susan!What abeautiful dressmymotherme!A.is buyingB.has boughtC.buys D.bought
42.His fatherdied whenhe achild.A is B wasC had beenDhas been
43.We arrivedafter thefilm.A.has startedB.had startedC.was started D.had beenstarted44・Lets waittill therain.A,has stoppedB.will stopC.is stoppingD.stops
45.It5yearssincewe kneweachother.A.isB.had beenC.willbeD.was
46.She sadsince youwent away.A.has beenB.is C.was D.had been
47.I himfor twomonths.A.got to know B.have got toknowC.have knowD.knew
48.That，s whyyou soworried inthelastfew days.A.are B.have beenC.had beenD.were
49.The scientistus atalk onair bythen.A.gave B.will giveC.gives D.had given
50.5:30yesterday,they hadfinished thwork.A.At B.In C.On D.By
51.I thinkhe willbe back_____three days.A.after B.in C.on D.later
52.I thinkhe willbe backthree oclock.A.after B.in C.on D.later
53.Where isJim He his lessonsintheclassroom.A.does B.is doingC.has doneD.did
54.Where isJim Heto London.A.has goneB.goes C.went D.will go
55.When hegot tothe cinema,thefilmhad forhalfanhour.A.begun B.beenonC.startedD.beenin
56.Did yousee himlastnightNo,hetobed when Igothome.A.went B.had goneC.has goneD.hadbeen
57.-----------youthemedicine----Yes,I itafter lunch.A.Did take,took B.have taken,have takenC.Have taken,took D.will take,takes
58.Judy theGreatWalltwice,and nowshe still___________to gothere.C.has goneto,wants D.has been to,wantsA.wentto,wanted B.goes to,wants
59.Excuse me.Look atthe signNo smoking.Sorry,I it.A.don，t seeB.didn，t seeC.haven，t seenD.won t see
60.Tom hasworked theretwoyearsago.A.for B.at C.inD.since
61.I youforalongtime.Where youAdidn，t see,did go B didn，tsee,have goneChaven，t seen,havebeenD haven，t seen,have gone
62.He hasbeen toShanghai,has heA.already B.never C.ever D.still
63.Tom out.Oh has he Whattime heoutA.is,did,goB.went,is,goingC.has gone,did,goD.is going,does,go
64.Where isLi LeiHe_______his sportsshoes inthe room.He footballwith hisfriends.A.is puttngon,is playingB.puts on,will playC.is puttingon,will playD.put on,played
65.Lily andLucy canspeak goodChinese becausethey Chinafor6years.A.havebeenin B.havebeentoC.have cometoD.were
66.The studentswillgotothe WestHill Farmby bikeif itfine tomorrow.A.willbeB.is C.was D.does
67.Henry abirthday cardfor Samyesterday.A.has boughtB.buys C.bought D.will buy
68.How longatthisfactoryA.have youcome B.hashein C.will hebeD.had hebeen
69.r vethis dictionarya year.Its stillnew now.A.bought,for B.had,for C.bought,since D.had,since
70.When Igot tothe factory,the workersabout thefilm.A.are,talking B.have talkedC.were talkingD.talked
71.Our knowledgeof theuniverseallthetime.A.--g-r-oWwelBl.,isshegrowing C.grows Dgrew acopy forherselflastweek..
72.He rememberedhe anew jacket,but he—forA.buys B.had boughtC.has boughtD.bought
77.How longhave youA.has chosen,has paidB.has chosen,hiats.n，t paidthereAbout
475.Stay inside.It hardoutside rightnow.D.had chosen,hadn，t paidC.had chosen,had paidyears.D.rainsA.is rainingB.has rainedC.was raining
73.r11catch upwith Lucybefore shethe finishingline.Sorry,Iit again.76A..Wo ruel adchyou pleaBs.einsot redar cahw inpgicturesC.onretahcehewsalDl.thewill reachA.am not doing B.don，t doC.didn，t doD.won，tdo
74.Meimei,why didntyou givebook toAnncome B.goneC.leftD.worked
78.Hehishomework andnow islistening tomusic.A.finished B.will finishC.has finishedD.finish
79.The ReadsA.were havingB.was having
80.His C.are havingD.is havinghair____________white thesedays.A.have turnedB.are C.has turnedD.will belunchwhenIgottotheir house.答案
1.B hasbeento表示去过某地，但现在已回来has goneto表示去了某地，且现在还未回来C、D选项不符合题意
2.D本题强调他妈妈开门的一瞬间他正在做什么，而非做了什么B,C选项不符合题意
3.D Howlong,for均暗示本题应用完成时，且die为终止性动词，不能与for+时间段连用，C为干扰项.
4.C told,thenextday均暗示本题应用过去将来时，A不符合题意，B为干扰项
5.B在if引导的条件状语从句中，要求主句为一般将来时，从句为一般现在时
6.D said,never均暗示本题应用过去完成时，而此题又强调主语从未去过日本
7.C此题为客观真理，必须用一般现在时
8.C本题表示发生在过去的丢车事件对现在造成步行上学的影响
9.A到达会场发生在过去，人已离开又发生在到达会场之前应用过去完成时本题中没有动作持续的暗示,故不选D.
10.C since引导的时间状语从句中，主句为现在完成时，从句应为一般过去时
11.D for引导的时间段必须要用持续性动词
12.A本题时态应为过去范畴，车开在先，人到在后，且for的出现标志从句动词应为持续性动词
13.B Shallwe/I dosth是争求对方意见或建议的常用句型，且shall只能用于第一人称.
14.A本题为过去范畴，且不强调某一具体时刻的动作，所以选A.
15.C本题look暗示现在进行时态，every year则表规律性动作，用一般现在时
16.D与Howlong搭配应用持续性动词，keep不是过去分词故选D.
17.C与for+时间段搭配应用持续性动词
18.C in+时间段用于将来时
19.D本题thisevening可考虑为将来的时间状语，故只能选D
20.A与for+时间段搭配应用持续性动词
21.A因过去多次去北京才导致了解该城市，而主句已为过去时，故选A
22.B本题为过去时，与动词持续性或终止性无关
23.C本题为现在完成时第一种用法，与动词持续性或终止性无关
24.A本题主句为祈使句，相当于一般将来时，谓语动词用一般现在时，故选A.
25.C本题during hisstay inTokyo表明动作发生在过去
26.B根据从句中的谓语动词时态题示主句应为过去时，而不能单独看How often就用一般现在时
27.A本题虽有tomorrow,但因出现助动词do,故不考虑将来时，且want具有将来色彩
28.D本题最后一句出现remembered,说明动作发生在过去，而去农场又发生在去工厂之前，且有for+时间段做时间状语，故选D
29.D星期变化为客观规律，不是推测或打算故选D不选A
30.B since引导时间状语从句，主句为现在完成时，从句现为一般过去时see为终止性动词，但其否定形式可用于since引导时间状语从句中
31.C
32.B
33.C often,always,usually等副词若与过去时间状语同时出现，则服从后者
34.D
35.B for+时间段若与过去时间状语同时出现，则服从后者故此两题用过去完成时
36.C宾语从句的主句为过去时，但从句为客观真理，所以仍保留一般现在时.
37.C assoonas要求主句为一般将来时，从句为一般现在时
38.B while后面应跟着进行时态，而主句的felt则暗示过去范畴
39.C本题易错选B和D,但后面的感叹句表明画画已成事实，且对现在产生影响故选C。
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