初中8个时态ppt课件.ppt

1、时,态,1,八种时态,一般现在时,一般过去时,现在进行时,过去进行时,一般将来时,过去将来时,现在完成时,过去完成时,2,1一般现在时 V.（s/es） 2一般过去时 V.ed 3现在进行时 be+V.ing 4过去进行时 was/were+V.ing 5一般将来时 will+V. 6过去将来时 would+V. 7现在完成时 has/have+v.ed（过去分词） 8过去完成时 had+V.ed（过去分词）,3,一般现在时：表示现在经常反复发生的动作、存在的状态或习惯性的动作。动词写原形或第三人称单数形式，即主语为第三人称单数时，动词一般要加-s/es,与名词复数规则构成类似。如果动词为行为

2、动词，构成问句、否定句需加助动词/do/does；一般现在时的时间标志词有：often,always,sometimes,usually,every day,on Sundays等；另外表示主语具有的性格、能力、特征，表客观事实和普遍真理，表现在发生的具体动作等也用一般现在时；在时间和条件状语从句中常用一般现在时代替一般将来时；预先计划安排好的将来行为也可用一般现在时；状态感觉动词如：be,love,want, hope,understand等只用一般现在时，不用进行时。,4,一般现在时用法,习惯活动,现在情况,客观事实,主将从现,I get up at six every morning.,

3、They are very busy.,He needs help.,The moon moves round the earth.,Well go there if it doesnt rain.,Hell call you when he arrives.,5,练习：1I book everyday 2He TV everyday 3They story everyday,read,watches,tell,6,一般过去时：表示过去经常或偶然发生的动作或存在的状态。一般过去时动词用过去式，过去式的构成一般在原形动词后加-ed。具体有四种方法，即直接加-ed，加-d，改y为i加-ed,双写辅

4、音字母加-ed；有些动词的过去式是不规则的，要特别记忆，熟练运用，如：gowent,dodid等；过去式除be动词外，没有人称和数的变化；行为动词的过去时，如果改为问句，否定句要加助动词did。动词的过去式改为动词原形：一般过去时的时间状语为表示过去的时间：如：yesterday,last year,two days ago等；在时间条件从句中，用一般过去时表示过去将来时。,7,一般过去时用法,过去活动,过去状态,过去连续活动,I saw him yesterday.,I was in Grade One last year.,She picked it up and went out.,8,

5、1.写出过去式： do （ ） eat （ ） see （ ） have （ ） draw （ ） win（ ）,练习,did,saw,drew,ate,had,won,9,2.填空,1.I a picture yesterday. 2.She to a book last week . 3.They a story in the morning.,drew,went,buy,told,to的后面永远加动词原形,10,现在进行时，表某一时刻或时段正在进行的动作。动词构成为：be+现在分词(动词+-ing形式)。现在分词构成通常有三种即：在原形动词后直接加-ing,去“e”加-ing,双写最后一

6、个辅音字母加-ing，另外以ie结尾的将ie改为y再加-ing，以er结尾的，如果是重读音节r结尾，先双写r再加-ing，如：prefer-preferring,如果不是重读音节则直接加-ing，如：water-watering;现在进行时的标志词有now,look,listen等，大部分根据上下文的情景理解；表示当前一直或反复在进行的动作或难以终止的动作，表示经常反复发生的动作，常与always连用，含有赞扬、厌恶等感情色彩；表示明确安排好的不久要发生的事情等都用现在进行时表示。,11,现在进行时用法,正在进行,一直进行,与always连用,Look, they are playing fo

7、otball.,He is writing a novel this year.,My teacher is always smiling in class.,12,练习,1.Tom TV now . 2.She book now. 3.He bike now. 4.They milk now . 5.People are new bed,is watching,is reading,is riding,are drinking,buying,13,过去进行时：表示过去某个时刻或某段时间内正在进行的动作。动词的构成为：be(was/were)+doing;过去进行时的时间状语常用，at eig

8、ht yesterday,morning,from 7:00 to 9:00 last night, 有时用when,while连词引导的状语从句表示：过去进行时可用来叙述过 去经常或反复发生的动作，常与always连用，表示赞扬、厌恶等；过去进行时与一般过去时的区别；过去进行时强调过去某一时间正在进行的动作，而一般过去时往往表示一个完成的动作。,14,过去进行时用法,过时正进,过段直进,when, while,I was doing my homework at eight last night.,They were watching TV from nine to ten yesterda

9、y.,They were reading aloud when the teacher came in.,15,1.I TV when my mother came in.,2.They cake at 7:00 yesterday.,was watching,are making,16,现在完成时：表示过去发生但与现在有联系的动作或状态，强调对现在的影响和结果。现 在完成时动词的结构为：have/has+done(过去分词)，其中have,has随主语的人称和数而变 化，done的规则变化与动词的过去式同形，即在原形后加-ed，不规则的过去分词必须熟记 ；现在完成时的标志词常有：alread

10、y,yet,ever,never,just,before等；现在完成时还可表示过去开始、持续到现在的动作或状态，常与for,since短语连用，句中动词一般为延续性 动词；否定句可用短暂性动词，for加段时间，since后加点时间或一般过去时的句子；一般过去时与现在完成时的区别：现在完成时强调过去动作对现在的影响，和现在密切联系；一 般过去时强调动作发生的时间、地点、方式等，不涉及现在的影响；be和go的现在完成时区别；have /has been to 表示“去过某地”，已回来；have/has gone to表示“已去某地” ，已离开，没回来。 ,17,现在完成时用法,过影响现,过延到现,

11、两“去”,I cant find my pen. I have lost it.,Have you finished it yet ?,He has worked here for a year.,I have been in this school since 1999 .,He has been to China twice.,He isnt here. He has gone to the library.,18,过去完成时，表示在过去某一时间或动作之前已完成的动作或存在的状态。过去完成时的构成为：had+done；过去完成时的时间状语常用by加过去点时间，by the end of 加

12、过去段时间，before加过去点时间表示，有时用when，before，after等引导的时间从句中。 ,19,1.I had _ a lunch. 2.She _ a books.,had,had read,20,一般将来时：表示将来要发生的动作或存在的状态。动词do的一般将来时结构为will+do,主语为第一人称时可用shall+do，be going to do 结构也可表示将来时，可以和will互换，但有些情况不可互换，带有意愿色彩，常用will;表邀请或命令时，用will;在时间和条件从句中，主句将来时常用will；有迹象表示某事将要发生或打算，计划决定要做某事，一般用be goin

13、g to do 结构；一般将来时的时间为表示将来的时间：如tomorrow,next week等。,21,一般将来时用法,将来状态,将来活动,主将从现,现进表将,There will be rain tomorrow.,What are you going to do next weekend?,I will call you as soon as I get there tomorrow morning.,The bus is coming.,22,过去将来时：表示过去看来将要发生的动作或存在的状态。过去将来时动词的构成为：would/should+do,也可用was/were going

14、to+do；过去将来时一般用在从句中；一些表示位置移动的动词如：go,come,leave等可用过去进行时表示过去将来时。,23,【例1】 Our teacher,Miss Chen,_English on the radio the day before yesterday.2003 北京海淀区 A.teaches B.taught C.will teach D.had taught ,典型例题解析,【例3】 My mother_the windows already,so the room looks much brighter.2003 河南 A.has cleaned B.had cl

15、eaned C.is cleaning D.will clean,B,【例2】 Excuse me.Look at the sign NO PHOTOS! Sorry,I_it.2003 重庆 A.dont see B.didnt see C.havent seen D.wont see,B,A,24,典型例题解析,C,【例4】 You_to the meeting.Why didnt you go? 2003 山西 A.be invited B.will be invited C.were invited D.are invited,【例5】 When will you tell him t

16、he good news? I will tell him about it as soon as he_back. 2003 福州 A.comes B.came C.will come D.is coming,A,25,课时训练,.用所给动词的适当形式填空。 1.My brother isnt at home right now.He _(go)to Beijing.He_(be) there many tines.He _ (not be) back until next week. 2.When I got home,my mother_(go)out for a walk. 3.He_

17、(finish)his composition just now. 4.By the end of next month,all our lessons_ (finish). 5. _she _(do) morning exercises every day?,has gone,has been,wont be,had gone,finished,will be finished,Does,do,26,课时训练,6.In the part few years,another bridge _ (build)over the Changjiang River. 7.She_ (watch)TV

18、while she_ (wash) her clothes. 8.He said he_ (give)her the present as soon as she _(come)back. 9.Listen!Someone_(sing)in the next room. 10.Our teacher told us the earth_(go) around the sun. ,has been built,watched,was washing,would give,came,is singing,goes,27,.单项选择 1.Sorry,I_to help you at ten.I wa

19、s busy at the momen A.wont come B.cant come C.didnt come D.shouldnt come 2.He_this pen for five years.He_it in 1997. A.has bought,bought. B.bought,bought C.has kept,has bought D.has had,bought 3.She_apples in her garden when I_to see her yesterday. A.picked，went B.was picking， went C.picked，was goin

20、g D.was picking，was going 4.I don t know if my friend_.If he _,Ill let you know. A.comes,comes B.comes, will come C.will come,comes D.will come,will come 5.John said he_ supper.He was quite full. A.had had B.was haring C.had D.has eaten,课时训练,C,D,B,C,A,28,6.There_two meetings tomorrow afternoon. A.are going to be B.are going to have C.is going to be D.will have 7.It_3 years since I_to No.1 Middle School. A.is,come B.is,have come C.was,came D.is,came 8.Father_when I _yesterday morning. A.still slept,got up B.was still sleeping,got up C.is sleeping,got up