时态的重点和难点ppt课件.ppt
一、动词时态的主要考点1、考查在语境中判断动词时态的运用能力。常考的时 态为：一般现在、一般过去、一般将来、现在进 行、过去进行、现在完成、过去完成、现在完成进 行、过去将来等。2、时间、条件、让步等状语从句中动词的时态；主从 句时态呼应问题。,动词的时态,熟记英语中常考时态的构成（以study）为例,时,式,一般式,进行时,完成时,完成进行时,现在,将来,过去将来,过去,时,式,现在,过去,将来,过去将来,一般式,进行时,study/ies,studied,will/shallstudy,should/wouldstudy,amisare,studying,waswere,studying,will/shall be studying,would/should be studying,时,式,现在,过去,将来,过去将来,完成式,完成进行时,have studied,had studied,will/shall havestudied,should/wouldhave studied,will/shall have beenstudying,would/should have been studying,have/has been studying,had been studying,常见易混时态的区别,A.一般过去时与现在完成时的区别,时间上有差异：凡有过去时间的均用过去时态，不能用完成时态，如含有ago、last year、just now、the other day等。结果上有差异：现在完成时强调的是对“现在”的影响和结果，动作到现在刚完成或还在继续；一般过去时强调的是动作发生在“过去”，和现在毫无关系。,*Theyve gone to Paris so far.他们目前已经去巴黎了(说明他们现在不在这里)。*They went to Paris last year.他们去年去过巴黎(只说明去过,不表明是否现在仍在那里)。,1.(2016北京)I _(read)half of the English novel,and Ill try to finish it at the weekend.2.(2015全国卷)When a new day breaks,the walls_(give)up their heat and are now cold enough.,have given,have read,解题关键:根据语境可知强调“耗尽了热量后,现在足够冷了”,故give up这一动作是截止到现在已经完成的动作,且对现在造成了影响,故要用现在完成时。,B.一般过去时和过去进行时的区别,He usually writes a lot of letters,but he isnt writing at present.,【典例剖析】用所给词的适当形式填空(2015北京高考)I(write)to tell you my exciting plan for the summer holiday.解题关键:此句是书信的开头语,强调现在正在写信,故用现在进行时。答案判定:am writing,C.一般过去时和过去进行时,*I was reading a novel last night.(可能没看完)。*I read a novel last night.(已经看完)。,D.过去完成时与一般过去时：过去完成时强调的是“过去的过去”；一般过去时表示过去发生的一个动作、过去存在的一种状态及过去的一个客观事实，与现在无关。1).He got up early,washed his face and then _(go)to work.如出现同一主语表示过去发生的连续几个动作（“连谓”）形式则只用一般过去时即可。2).(2016福建)-Where is Peter?I cant find him anywhere?-He went to the library after breakfast and _(write)his essay there ever since.,went,has been writing,E.现在完成时和过去完成进行时,Ive watched the TV series Nirvana in Fire.(已经完成)I have been watching the TV series Nirvana in Fire these days.(仍在进行甚至仍将继续),【典例剖析】单句改错(2014全国卷)Since thenfor all these years we had been allowing tomatoes to self-seed where they please.,have,几种时态的替代问题A：一般现在时代替将来时：1.在时间、条件、让步状语从句中用一般现在时代替将来时外。2.表示现在已安排好的未来事项，行程等活动（这种用法主要用于火车时刻、飞机时刻、电影开演、作息安排等时刻表上。）也用一般现在时来代替将来时。,1).The museum _(open)at ten tomorrow.博物馆明天10点开门。(实际上每天如此。)2)We will have to put off the sports meeting if it _(rain)tomorrow.3)I cant leave unless my boss _.,agrees,rains,opens,B.现在进行时用来表示按计划、安排近期将要发生的动作，多与表示移动的动词come,go,arrive,leave,fly,start等连用。He is leaving for London.Christmas is drawing near.-Its a pity that you didnt talk much with Jack.-Yes,the train _(leave)when I rushed to the station to see him off.,was leaving,C：一般现在时代替完成时：句型“It is since”代替“It has been since”It is(=has been)five years since we last met D：一般现在时代替进行时：在全部倒装句中都用一般现在时代替现在进行时。如：Look,here _(come)Mr.Li.,comes,表示“原打算做什么而实际上没做的句型有1)was/were to have done 2)would like/love to have done本想做3)hope/expect/mean/intend/want/think/suppose其过去完成时表示过去未曾实现的愿望4)hoped/expected/meant/intended+to have done5)虚拟语气6)could/might/need/should/ought to/had better/would rather have done7)was/were going to do sth.,即 had hoped to do,=would have done,过去进行时表示过去某个时间某事正在进行，和一般过去时的差别是过去进行时表示一个正在进行尚未完成的动作，而一般过去时表示已完成的动作。,I was reading a book last night.(不一定看完）I read a book last night.（已经看完）She was writing letters.I didnt want to disturb her.She wrote several letters and asked me to post them.,He was studying at the library at the time ofthe fire.What were you doing when I called you?,A.一般过去时和过去进行时的区别,一、动词时态的主要考点1、考查在语境中判断动词时态的运用能力。常考的时 态为：一般现在、一般过去、一般将来、现在进 行、过去进行、现在完成、过去完成、现在完成进 行、过去将来等。2、时间、条件、让步等状语从句中动词的时态；主从 句时态呼应问题。3、持续性动词和终止性动词的用法区别。4、及物动词的被动语态。5、系动词的用法特点。6、某些以主动形式表被动意义的动词的用法。,
