最新现在完成时课件(上课用)精品课件ppt讲解学习

1、现在完成时课件(上课用)一)构成:have/has+动词动词过去分词过去分词B 不规则动词的过去分词不规则动词的过去分词thoughtcaughtgivenmadewrittenputcostgrownhurtrunfeltfallenflownhaddrunkbroughtwornsungforgottenkept不规则动词原型不规则动词原型- -过去式过去式- -过去分词形式：过去分词形式：1 1） AAAAAA型型( (三种都一样三种都一样) )如：如：cost cost cost cut cut cut hurt hurt hurt shut shut shut set set set

2、 2）ABB型(过去式与过去分词相同) 如如: : bring-brought-brought catch caught caught lead led led 3 3） ABCABC型型( (三种都不一样三种都不一样) ) 如：begin-began-begun grow grew grown ring rang rung break broke broken 4 4）ABA型型(原形与过去分词相同原形与过去分词相同) 如: come-came-come become became become run ran run 写出下列动词的过去分词形式写出下列动词的过去分词形式.wake _ 2.

3、 teach _ 3. sell _4. see _ 5. ride _ 6. pay _7. choose _ 8. throw _ 9. think _10. eat _ 11. drive _ 12. catch _13. bring _ 14. break _15. give _16. get _17. know _ 18. open _19. write _ 20. forget _Woken taughtSold seenRidden paid Chosen thrownThought eaten Driven caught Brought brokenGiven gotten K

4、nown openedWritten forgotten二)含义:(一)表示过去发生的动作或事情对现在的影响和产生的结果.它强调的是过去的动作同现在的联系.常用的时间状语有already,yet,ever,never,just,before等.(定义二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引导的时间状语连用.句式构成句式构成1.肯定句肯定句:S(主语）+have/has(助动词）+PP(过去分词)+(其他）。2. 否定句否定句:S ( 语语)+have/has+not +PP(过去分词过去分词)+(其他）。其他）。3.一般疑问句一般疑问句Ha

5、ve/has+ S (主主语语)+PP(过去分词过去分词)? Yes, S+have/has.No, S+have/hasnt.（改为否定句和一般疑问句并肯否回答)Ihaveseenhimsincehisweddingday.Ihaventseenhimsincehisweddingday.Haveyouseenhimsincehisweddingday? HehaswrittentomesinceIhavebeenill.(改为一般疑问句)Hashewrittentoyousinceyouhavebeenill? He hasnt written to me since I have bee

6、n ill1. 现在完成时中标志词的用法区别现在完成时中标志词的用法区别1.Already肯定句肯定句: 句中句中(助后实前助后实前)/句末句末 “己经己经”一般疑问句一般疑问句: 句末句末(表示惊讶的语气表示惊讶的语气) “难道难道”Eg.Ivealreadyhadbreakfast.(更常见)=Ivehadbreakfastalready.(表示强调)Haveyouhadbreakfastalready?注:有already的句子在时态上并不都是现在完成时,判断时要看该词后是否有动词的过去分词.Eg.Shesalreadyeightyyearsold.Itwasalreadyverylat

7、e.2. yet在现在完成时中的用法在现在完成时中的用法否定句否定句:句末句末 “还还(没没)”疑问句疑问句: 句末句末 “己经己经” Eg.Ihaventhadbreakfastyet.Haveyouhadbreakfastyet?注:带already的肯定句变成否定句或疑问句时,将already要变成yet放在句末.Eg. I have already done my homework.否定句否定句: :一般疑问句一般疑问句: :I havent done my homework yet.Have you done your homework yet?3. ever在现在完成时中的用法在现

8、在完成时中的用法肯定句肯定句/疑问句疑问句 : 句中句中 “曾经曾经”Eg.IveeverbeentoBeijing.HaveyoueverbeentoBeijing?4. never在现在完成时中的用法在现在完成时中的用法否定句否定句: 句中句中 “从来没有从来没有”Eg. Ive never been to Beijing.注:带ever的肯定句变否定句时,要将ever变成never;带ever的一般疑问句作否定回答时可用“No,never.”Eg. He has ever made dumplings.否定句否定句:Have they ever travelled by train?No

9、, never.He has never made dumplings.5. just在现在完成时中的用法在现在完成时中的用法用于用于句中句中, 表示表示“刚刚刚刚”Eg. Ive just had breakfast. What have they just done?6. before在现在完成时中的用法在现在完成时中的用法用于用于句末句末, 表示表示“以前以前” Eg. Ive seen it before. Has she ridden a bike before ?(定义二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引导的时间状语连用.1

10、.for +Eg.Ihavebeenherefor5weeks.HesstudiedEnglishfor3years.一段时间一段时间2. since +从句(一般过去时)词组(表示过去某一时间的)时间点时间点Eg.Ihavebeenheresince2000.Ihavebeenheresince5yearsago.IhavebeenheresinceIgraduatedin2000.注2):对for或since引导的时间状语提问必须用howlong,决不能用when.Eg.Ihavelivedherefor10years.Howlonghaveyoulivedhere?Shehasstood

11、heresince2hourago.Howlonghasshestoodhere?注3):短暂性动词不能和for或since引导的时间状语连用,当然也不能用于howlong引导的问句中.Eg.(误)Ihavelefttherefor5years.(正)Ihavebeen awaytherefor5years.短暂性动词与延续动词间的转换5.短暂动词和短暂动词和延续动词转换延续动词转换瞬间动词瞬间动词 vs延续动词延续动词练习 判断：他到达车站半个小时了 Hehasarrivedatthestationforhalfanhour()He has been at the station for h

12、alf an hour .or He arrived at the station half an hour agoHe _the League since two years ago Joined B. has joined C. has been in翻译：这个电影已经放映十五分钟了翻译：这个电影已经放映十五分钟了-The film has been on for fifteen minutes. have /has been tohave /has been to，have / has gone tohave / has gone to， have / has been inhave /

13、 has been in的用法区别的用法区别 1“Have /has been to+地名地名”表示曾经去过某地，说话时已经回到说话地点，常与once、twice、ever、never等时间连用。2“have / has gone to +地名地名”表示去某地了，现在没有回答，人不在说话地点。3“have / has been in +地名地名”表示“在某地”。指一种存在状态巧记 ： been to ，gone to been in 意不同，三者用法要记清； have /has been to + 地名，曾经到过某地行； have /hasgone to + 地点，到某地去了已走远。have/

14、hasbeenin+地名，已经在某地了。 用have /has been to和和have / has gone to填空 1.Hi，Lucy，youeverBeijing？ No，I. 2.Whataboutyoursister，Lily？ Oh，sheChengdu， shewillcomebacknextweek. Ok，thanks. Yourewelcome.have been to haventhas gone to四四)It is +一段时间一段时间 +since+句子句子(一般过去时一般过去时) =一段时间一段时间+has passed +since + 句子句子(一般过去时一

15、般过去时) Eg.ItisfiveyearssinceIjoinedthearmy.=FiveyearshaspassedsinceIjoinedthearmy.练习l自从我来到这正好两天It is just two days since I came hereTwo days has passed since I came here lIt_(be)tenyearssinceI_(finish)middleschool. ishas been finished（一）现在完成时与一般过去时的区别（一）现在完成时与一般过去时的区别现在完成时表示过去发生或已经完成的现在完成时表示过去发生或已经完成

16、的某一动作对现在产生的影响或结果，强某一动作对现在产生的影响或结果，强调的是现在的情况。所以它不能和表示调的是现在的情况。所以它不能和表示过去时间状语连用；而一般过去时只单过去时间状语连用；而一般过去时只单纯表示过去的动作或状态，和现在不发纯表示过去的动作或状态，和现在不发生关系，可以和表示过去的时间状语连生关系，可以和表示过去的时间状语连用。用。He has lived in Beijing since 1999.自自1999年以来他一直住在北京。年以来他一直住在北京。（说明他现在仍然在北京。）（说明他现在仍然在北京。）He lived in Bejing in 1999.在在1999年的时

17、候他在北京住过。年的时候他在北京住过。（现在是否住在北京不知道）（现在是否住在北京不知道）Translation 1.1.他昨天去北京了。他昨天去北京了。 2.2.他去北京两天了。他去北京两天了。He went to Beijing yesterday. （现在是否住在北京不知道）（现在是否住在北京不知道）He has been in Beijing for two days. （说明他现在仍然在北京。）（说明他现在仍然在北京。）用动词的适当形式填空（注意时态）（注意时态） 1.-_you_yourpen?(mend) -Yes,I_. -When_you_it? -I_ityesterday

18、. 2.-Howdoyoulikethefilm? -I_(notsee)suchamovingfilm before. 3.Milliessister_(join)theclublastweek. Soshe_(be)intheclubfornearly oneweek. Have mended have did mend mended havent seen joined has been 4.Myfather_(give)up_(smoke). Hedoesnt_(smoke)now. 5.TheGreenfamily_(notcome)back yetfromthecinema. Th

19、ey_(go)toseeafilmonehourago. 6.You_(notvisit)yoursonfora longtime. has given smoking smoke havent come went havent visited 6.ShehasknownSam_nineyears. (for,never,since) 7.Theyhave_arrived. (ever,just,yet) 8.Haveyou_riddenahorse? (ever,for,yet) 9.ShehasknownFred_theywere atprimaryschool. (already,jus

20、t,since) 10.Wehavenotcompletedthe project_.(already,for,yet) for just ever since yetII. 将下列句子中的动词改为现在完成时将下列句子中的动词改为现在完成时. John is drawing a picture. I write my name on the4 card. Tom blows out the light. The cat drinks its milk. The tree falls across the road. My parents give me a present.John has d

21、rawn a picture.I have written my name on the card.Tom has blown out the light.The cat has drunk its milk.The tree has fallen across the road.My parents have given me a present.单项选择单项选择 He _ working.A. have just started B. has just startedC. Has just stars 2. _ you _ your suitcase yet? Do, pack B. did, pack C. Have, packD. Have , packed3. I _ my room already. have tidied B. had tidied C. will tidy4. I _ my plane ticket, but I cant find it. will buy B. would buy C. have boughtD. have buyed5. -What has Denis done?