初中英语八种时态解精选PPT.ppt
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1、关于初中英语八种时态解第1页,讲稿共62张,创作于星期日一般现在时一般现在时一般过去时一般过去时现在进行时现在进行时过去进行时过去进行时现在完成时现在完成时过去完成时过去完成时一般将来时一般将来时过去将来时过去将来时第2页,讲稿共62张,创作于星期日一般现在时一般现在时第3页,讲稿共62张,创作于星期日一、一般现在时:一、一般现在时:概念概念:经常、反复发生的动作或行为及现在:经常、反复发生的动作或行为及现在的某种状况。的某种状况。时间状语:时间状语:always,usually,often,sometimes,every week always,usually,often,sometimes
2、,every week(day,year,month),once a week,on Sundays,(day,year,month),once a week,on Sundays,etc.etc.基本结构基本结构:bebe动词;动词;行为动词行为动词否定形式否定形式:am/is/are+not;am/is/are+not;此时态的谓语此时态的谓语动词若为行为动词,则在其前加动词若为行为动词,则在其前加dont,dont,如主语如主语为第三人称单数,则用为第三人称单数,则用doesntdoesnt,同时还原行为,同时还原行为动词。动词。一般疑问句一般疑问句:把把bebe动词放于句首;动词放于句
3、首;用助动词用助动词dodo提问,如主语为第三人称单数,则用提问,如主语为第三人称单数,则用doesdoes,同时,还原行为动词。,同时,还原行为动词。第4页,讲稿共62张,创作于星期日什么情况下用什么情况下用?第5页,讲稿共62张,创作于星期日表示经常或习惯性的动作或存表示经常或习惯性的动作或存在的状态。在的状态。表示主语通常的能表示主语通常的能力、兴趣爱好、和性格特征。力、兴趣爱好、和性格特征。表示客观的事实或真理。表示客观的事实或真理。表示表示按照时刻表或已经计划安排好的按照时刻表或已经计划安排好的将来行为。将来行为。(只限于是(只限于是go,come,go,come,leave,arr
4、ive,begin,start,take off,stop,leave,arrive,begin,start,take off,stop,bebe等表示开始或移动意义的词。)等表示开始或移动意义的词。)在时间状语从句和条件状语从句在时间状语从句和条件状语从句中,主句用一般将来时中,主句用一般将来时(will+(will+动词动词原形原形),从句中用一般现在时表将,从句中用一般现在时表将来。来。(主将从现)(主将从现)第6页,讲稿共62张,创作于星期日当主语是第三人称当主语是第三人称时,谓语动词要用时,谓语动词要用第三人称单数形式,第三人称单数形式,加加-s/es-s/es。除此之外。除此之外都
5、用动词原形。都用动词原形。第7页,讲稿共62张,创作于星期日动词第三人称单数动词第三人称单数形式变化规则形式变化规则 第8页,讲稿共62张,创作于星期日规则例子一般在词尾加-s,(清辅音后读/s/,在浊辅音后读/z/;在t后读/ts/,在d后读/dz/。)Playplays leaveleavesswimswims以字母s,x,ch,sh,o结尾的词加-es,读/iz/,如果动词原形词尾已有e,则只加-s。pass passes fixfixesteachteaches wishwishesdodoes以辅音字母加y结尾的词,先变y为i,再加-es,读/z/studystudies carry
6、carriesflyflies第9页,讲稿共62张,创作于星期日1.1.He_(be,am,is,are)a teacher at No.2 He_(be,am,is,are)a teacher at No.2 Middle School.Middle School.2.2.He_(have,has)classes in the afternoon.He_(have,has)classes in the afternoon.3.3.He_(get,gets)up at half past six every He_(get,gets)up at half past six every morn
7、ing.morning.4.4.He always _(come,comes)to school on He always _(come,comes)to school on time.time.5.5.He _(study,studies)very hard at his lesson.He _(study,studies)very hard at his lesson.6.6.One and two _(be,is,are)three.One and two _(be,is,are)three.7.7.Blue and yellow _(make,makes)green.Blue and
8、yellow _(make,makes)green.8.8.The earth _(move,moves)round the sun.The earth _(move,moves)round the sun.9.9.I will go there if I _(be,will be,am,is,are)I will go there if I _(be,will be,am,is,are)free tomorrow.free tomorrow.第10页,讲稿共62张,创作于星期日10.10.I will go there when I _(have,will I will go there w
9、hen I _(have,will have,has)time tomorrow.have,has)time tomorrow.11.11.He wont come to the party unless he He wont come to the party unless he _(be,will be,am,is,are)invited._(be,will be,am,is,are)invited.12.12.Ill wait here until my mother Ill wait here until my mother _(come,comes,will come)back._(
10、come,comes,will come)back.13.13.Please return the book to the library as Please return the book to the library as soon as you _(finish,finishes,will soon as you _(finish,finishes,will finish)reading it.finish)reading it.14.14.Once you _(see,sees,will see)him,Once you _(see,sees,will see)him,you will
11、 never forget him.you will never forget him.第11页,讲稿共62张,创作于星期日一般过去时一般过去时第12页,讲稿共62张,创作于星期日概念:过去某个时间里发生的动作或状态;概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。过去习惯性、经常性的动作、行为。时间状语:时间状语:ago,yesterday,the day before ago,yesterday,the day before yesterday,last week(year,night,month),in yesterday,last week(year,night,
12、month),in 1989,just now,at the age of 5,one day,long 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.long ago,once upon a time,etc.基本结构:基本结构:bebe动词;动词;行为动词行为动词否定形式:否定形式:was/were+not;was/were+not;在行为动在行为动词前加词前加didntdidnt,同时还原行为动词。,同时还原行为动词。一般疑问句:一般疑问句:waswas或或werewere放于句首;放于句
13、首;用助动词用助动词dodo的过去式的过去式did did 提问,同时还原提问,同时还原行为动词。行为动词。第13页,讲稿共62张,创作于星期日谓语动词使用过去式形式,谓语动词使用过去式形式,加加eded,分为规则和不规则变,分为规则和不规则变化。表示过去经常发生的动化。表示过去经常发生的动作,也可用作,也可用“used to do used to do”和和“would+“would+动词原形动词原形”。第14页,讲稿共62张,创作于星期日构成规则构成规则例子例子一般在动词原形末尾加-ed,(在清辅音后读/t/;在浊辅音和元音后读/d/;在/t/,/d/后读/id/。looklooked p
14、layplayedworkworked结尾是e的动词在末尾加-dlikeliked livelivedhopehoped末尾只有一个辅音字母的重读闭音节,先双写这个辅音字母,再加-edplanplanned stopstoppeddropdropped结尾是“辅音字母y”的动词,先变“y”为“i”再加-edstudystudied worryworriedcrycried第15页,讲稿共62张,创作于星期日1.1.He_(be,was,were,been)here a He_(be,was,were,been)here a moment ago.moment ago.2.2.They _(be
15、,was,were,been)here just They _(be,was,were,been)here just now.now.3.3.The scientists _(leave,leaves,The scientists _(leave,leaves,leaved,left)for America yesterday.leaved,left)for America yesterday.4.4.Last week we _(visit,visited)the Last week we _(visit,visited)the Science Museum.Science Museum.5
16、.5.When I was a child,I often _(play,When I was a child,I often _(play,played)football.played)football.6.6.The students ran out of the classroom as The students ran out of the classroom as soon as the bell _(ring,rang,rung).soon as the bell _(ring,rang,rung).第16页,讲稿共62张,创作于星期日现在进行时现在进行时第17页,讲稿共62张,创
17、作于星期日作谓语的动词用来表示动作(情况)作谓语的动词用来表示动作(情况)发生时间的各种形式称为时态。发生时间的各种形式称为时态。1.1.概念:表示现阶段或说话时正在进概念:表示现阶段或说话时正在进行的动作及行为。行的动作及行为。2.2.时间状语:时间状语:Now,at this time,days,Now,at this time,days,look.listenlook.listen等时间状语做标志。等时间状语做标志。3.3.基本结构:主语基本结构:主语+be+doing+be+doing+其他其他4.4.否定形式:主语否定形式:主语+be+not+doing+be+not+doing+其
18、其他他5.5.一般疑问句:把一般疑问句:把bebe动词放于句首。动词放于句首。第18页,讲稿共62张,创作于星期日6.6.用法:现在进行时表示用法:现在进行时表示1)1)、现在(说话的瞬间)正在进行或发、现在(说话的瞬间)正在进行或发生的动作,强调生的动作,强调“此时此刻此时此刻”。E.g.He is reading.E.g.He is reading.They are talking now.They are talking now.2)2)、当前一段时间内的活动或现阶段正、当前一段时间内的活动或现阶段正在进行的动作。在进行的动作。E.g.They are working these day
19、s.E.g.They are working these days.3)3)、某些动词的现在进行时,表预定的某些动词的现在进行时,表预定的计划或即将发生的动作。计划或即将发生的动作。E.g I am coming.E.g I am coming.第19页,讲稿共62张,创作于星期日 现在分词的变法有现在分词的变法有1)1)、一般在动词词尾加上、一般在动词词尾加上-ing,E.g.jump-ing,E.g.jump2)2)、以不发音字母、以不发音字母e e结尾的动词,先去结尾的动词,先去e e,再加,再加-ing.E.g have write-ing.E.g have write3)3)、.以重
20、读闭音节末尾只有一个辅音以重读闭音节末尾只有一个辅音字母结尾的词,它前面是单个元音字字母结尾的词,它前面是单个元音字母时要先将词尾的辅音字母双写,再母时要先将词尾的辅音字母双写,再加上加上-ing.E.g.sit put -ing.E.g.sit put 其句式变换都在其句式变换都在bebe上做文章。上做文章。第20页,讲稿共62张,创作于星期日1.I _(write,am writing,is writing,are 1.I _(write,am writing,is writing,are writing)a letter now.writing)a letter now.2.Look,i
21、t _(begin,is beginning,am 2.Look,it _(begin,is beginning,am beginning,are beginning)to rain.beginning,are beginning)to rain.3.They _(study,is studying,am studying,3.They _(study,is studying,am studying,are studying)medicine at the Medical are studying)medicine at the Medical Institute of Chengde the
22、se days.Institute of Chengde these days.4.He _(teach,am teaching,is teaching,4.He _(teach,am teaching,is teaching,are teaching)an English lesson at this time.are teaching)an English lesson at this time.第21页,讲稿共62张,创作于星期日过去进行时过去进行时第22页,讲稿共62张,创作于星期日1.1.概念:表示过去某段时间或某一时刻概念:表示过去某段时间或某一时刻正在发生或进行的行为或动作。正在
23、发生或进行的行为或动作。2.2.时间状语:时间状语:at this time yesterday,at that at this time yesterday,at that timetime或以或以whenwhen引导的谓语动词是一般过引导的谓语动词是一般过去时的时间状语等。去时的时间状语等。3.3.基本结构基本结构 主语主语+was/were+doing+was/were+doing+其其他他 4.4.否定形式:主语否定形式:主语+was/were+not+was/were+not+doing+doing+其他其他 5.5.一般疑问句:把一般疑问句:把waswas或或werewere放于句
24、首。放于句首。(第一个字母大写)第一个字母大写)其句式变化仍然要在其句式变化仍然要在bebe上做文章。上做文章。第23页,讲稿共62张,创作于星期日过去进行时常与过去某一特定时过去进行时常与过去某一特定时间的状语连用,如间的状语连用,如 last night,at that last night,at that time,at noon yesterday,last Sunday time,at noon yesterday,last Sunday 等。等。也有时没有时间状语,要通过上也有时没有时间状语,要通过上下文的暗示来确定用过去进行时。下文的暗示来确定用过去进行时。第24页,讲稿共62张
25、,创作于星期日1.I _(cook,cooked,was 1.I _(cook,cooked,was cooking,were cooking)breakfast cooking,were cooking)breakfast when you arrived.when you arrived.2.What _you_(do,did,2.What _you_(do,did,was.doing,weredoing)at this time was.doing,weredoing)at this time yesterday evening?yesterday evening?3.We_(have,
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