2018现在完成时课件PPT演示课件

.,1,现在完成时,2018英语语法 -寒假班,.,2,学习目标,.,3,情境导入,Hello, Ken!,Hi, George!,Have you just been to the cinema?,Yes, I have.,现在完成时,.,4,构成,have /has+v 过去分词,现在完成时动词构成,知识讲解,助动词,否定,疑问,haventhasnt,Have you?Has he?,.,5,过去分词,1. 规则的动词过去分词：,过去分词：,知识讲解,.,6,2. 不规则的动词过去分词：,1. A-A-A型（现在式、过去式和过去分词同形）,知识讲解,过去分词,.,7,2. 不规则的动词过去分词：,2. A-A-B型（现在式和过去式同形）,知识讲解,过去分词,beat beat beaten 打,.,8,2. 不规则的动词过去分词：, A-B-A型（现在式和过去分词同形）,知识讲解,过去分词,come came come 来 become became become 变 run ran run 跑,.,9,2. 不规则的动词过去分词：,4A -B -B型,知识讲解,过去分词,（1）动词原形后加一个辅音字母d或t构成过去式或过去分词。Burn burnt /burned burnt/burned 燃烧learn learned/learnt learned/learnt 学习mean meant meant 意思hear heard heard 听见, 把动词原形的最后一个辅音字母“d”改为“t”构成过去式或过去分词。build built built 建筑lend lent lent 借给send sent sent 送spend spent spent 花费 lose lost lost 失去,.,10,2. 不规则的动词过去分词：,4A -B -B型,知识讲解,过去分词,其他bring brought brought 带来buy bought bought 买think thought thought 想 fight fought fought 战斗 catch caughtcaught 抓住teach taught taught 教sleep slept slept 睡keep kept kept 保持pay paidpaid 付say said said 说,.,11,2. 不规则的动词过去分词：,5. A-B-C型（现在式、过去式和过去分词都不相同）,知识讲解,过去分词,（1）动词原形后加-n或-en构成过去分词。eat ate eaten 吃fall fell fallen 落下 steal stole stolen 偷give gave given 给,过去式加-n或-en构成过去分词。speak spoke spoken 说话break broke broken 破碎，折断wake waked/ woke waked/ waken 醒choose chose chosen 选择forget forgot forgotten 忘记,.,12,2. 不规则的动词过去分词：,5. A-B-C型（现在式、过去式和过去分词都不相同）,知识讲解,过去分词,变单词在重读音节中的元音字母“i”分别为“a”（过去式）和“u”（过去分词）。begin began begun 开始ring rang rung 按铃sing sang sung 唱,其他不规则动词的变化。be(am, is) wasbeen 是be(are) were been 是do did done 做go went gone 去,.,13,构成,I have worked for two hours.,He has already finished his homework.,主语 +,have/has+动词过去分词,知识讲解,.,14,用法,Have you had your lunch yet?,Yes, I have. Ive just had it.,用法1：,表示过去发生的或已经完成的某一动作对现在造成的影响或结果。,知识讲解,.,15,用法,Look! The blackboard is so clean now.He has cleaned the blackboard.,(他已经擦过黑板了。)这句话所表示的结果是黑板现在是干净的。,用法1：,表示过去发生的或已经完成的某一动作对现在造成的影响或结果。,知识讲解,.,16,用法,1. 常用短暂性动词做谓语动词.如arrive, get, finish, borrow, open, stop, begin, go, come, die, fall, ,2. 时间状语常用already, just, yet, ever, before, once( 一次),recently 等 不具体的过去时间或不带有时间状语,用法1：,表示过去发生的或已经完成的某一动作对现在造成的影响或结果。,知识讲解,.,17,用法,例句：,1.I _ (do) my homework already.2.He _(not finished) his homework yet.3._you ever _ (be) to Haiwaii?4.We _ never _ (see) such an exciting match before.5.Mother _ just _(clean) the house. Please dont come in.6.They _(practice) this dialogue twice.,知识讲解,have done,has not finished,Have,been,seen,have,has,cleaned,have practiced,.,18,注意：,用法,I have already seen the film named King Lion.,I havent seen the film named King Lion yet.,当在肯定陈述句中含有already或just 时，在转换成否定句或疑问句时，要把句中的already 或just 去掉，在句末加上yet.,知识讲解,Mother has just cleaned the house.,Mother hasnt cleaned the house yet.,.,19,用法2：,用法,We have lived here since 2000.,I have worked for two hours.,表示动作或状态在过去已经开始，持续到现在，也许还要持续下去。,知识讲解,.,20,用法,1.常用延续性动词,如be, sleep, live, learn, stay, have, keep, work, walk, ,2. 时间状语须表达过去到现在的一段时间 for two years，so far，during/in the past 2 years ，since 短语 （since two years ago/since 2000.）,用法2：,表示动作或状态在过去已经开始，持续到现在，也许还要持续下去。,知识讲解,.,21,用法,1) since +过去一个时间点(如具体的年、月、日期、钟点、1980, last month, half past six)。 I have been here since 1989,2) since +一段时间+ ago I have been here since five months ago.,since的四种用法,知识讲解,3) since +从句 Great changes have taken place since you left.,4) It is +一段时间+ since从句 It is two years since I became a postgraduate student.,.,22,用法,例句：,1. We _ (learn) English for three years/ since two years ago/since 2000.2.Mr. Green _ (be) in China these years.3.They _(write) 15 songs so far.4.The population _ (grow) more slowly in the past ten years.5.The Jiangs _(live) here for almost ten years.6.His parent _(teach) in this school since they came to the city.7.The child _(sleep)since two hours ago.,知识讲解,have learned,has been,have written,has grown,has taught,have lived,has slept,.,23,标志词,already,yet,已经,肯定句,疑问句或否定句,since + 点时间,for + 段时间,用how long提问,in the past/last . years,在过去的几年中,知识讲解,.,24,since + 点时间,for + 段时间,用how long提问,特殊用法,延续性动词,I have left the school for eight years.,I have been away for eight years.,与一段时间连用时，要使用延续性动词,知识讲解,.,25,May is in Beijing now. She _ her hometown since 1999.,left B. has left C. has been away D. was away,解析：,考查现在完成时用法。,left,leave,be away,have/has + 动词过去分词,C,知识讲解,.,26,buy,borrow/lend,leave,join,die,.,have,keep,be away,be in/be a member of .,be dead,.,非延续动词与延续性动词转换表,知识讲解,.,27,finish/end,open,close,begin/start,arrive/come/go/move/reach/get to,.,be over,be open,be closed,be on,be in/at/be here/be there,.,非延续动词与延续性动词转换表,知识讲解,.,28,练习环节,（1）He came to our village two years ago. He our village since two years ago. （2）He left home three days ago. He home for 3 days. （3）I bought the watch 2 weeks ago. I the watch since 2 weeks ago. （4）It is 5 days since I borrowed the book. I the book for 5 days.,知识讲解,has been in,has been away,have had,have kept,.,29,练习环节,（5）The film has begun. The film for half an hour. （6）I got to know him 10 years ago. I him for 10 years. （7）There is a factory. There a factory for 20 years. （8）Our school opened in 1960. Our school since 1960.,知识讲解,has been on,have known,has been,has been open,.,30,2）This is the that结构，that 从句要用现在完成时.,This is the best film that Ive (ever) seen. 这是我看过的最好的电影。,特殊用法,用于现在完成时的句型,1）It is the first / second time. that结构中的从句部分，用现在完成时。,It is the first time that I have visited the city.,知识讲解,.,31,She has gone to Pairs. 他去了巴黎。（现在不在这儿）,She has been to Paris (three times). 他去过巴黎(三次)。(现不在巴黎),特殊用法,have been to 和have gone to的区别,1）have been to表示去过某地，现在不在某地,2）have gone to表示到某地去了，现在不在此地,知识讲解,Have you ever been to American? 你曾经去过美国吗？,I have been to the post office. 我刚去过邮局。,.,32,练习环节,1. Jim isnt here. He to the library. He there an hour ago. 2. Wheres John? He just to the teachers office. 3. -How many times_ you ever_ to Shanghai? -I_ever_there three times.,知识讲解,has gone,has been,has,gone,have,been,have,been,.,33,He has studied English for five years.,他已学英语五年了。（说明他还继续学下去）,特殊用法,现在完成时和一般过去时的区别,现在完成时，强调这一动作产生的结果对现在的影响，与现在有关。,一般过去时，仅仅表示在过去某一时刻曾发生过这一动作，与现在无关。,知识讲解,He studied English for five years.,他曾学过五年英语。（只说明他过去学过五年英语，但现在不学了。）,.,34,练习环节,1. Did you go to the show last night?Yeah. Every boy and girl in the area _ invited.A. were B. have been C. has been D. was2. My parents _ in Hong Kong. They were born there and have never lived anywhere else.A. live B. lived C. were living D. will live3. Progress _ so far very good and were sure that the work will be finished on time.A. was B. had been C. has been D. will be,知识讲解,.,35,练习环节,4. We live day by day, but in the great things, the time of days and weeks _ so small that a day is unimportant.A. is B. are C. has been D. have been5. Do you think we should accept that offer?Yes, we should, for we _ such bad luck up till now, and time _ out.A. have had; is running B. had; is runningC. have; has been run D. have had; has been run6. Have you known Dr. Jackson for a long time?Yes, since she _ the Chinese Society.A. has joined B. joins C. had joined D. joined,知识讲解,.,36,练习环节,7. The coffee is wonderful! It doesnt taste like anything I _ before.A. was having B. have C. have ever had D. had ever had8. The country life he was used to _ greatly since 1992.A. change B. has changed C. changing D. have changed9. Although medical science _ control over several dangerous diseases, what worries us is that some of them are returning.A. achieved B. has achieved C. will achieve D. had achieved10. This machine _. It hasnt worked for years.A. didnt work B. wasnt working C. doesnt work D. isnt working,知识讲解,.,37,练习环节,11. _ leave at the end of this month. I dont think you should do that until _ another job.A. Im going to; youd found B. Im going to; youve foundC. Ill; youll find D. Ill; youd find12. My friend, who _ on the International Olympic Committee all his life, is retiring next month. A. served B. is serving C. had served D. has served13. Danny _ hard for long to realize his dream and now he is popular.A. works B. is working C. has worked D. worked,知识讲解,.,38,练习环节,14. How long _ David and Vicky _ married?For about four years.A. were; being B. have; got C. have; been D. did; get15. How can you possibly miss the