小学语法下册U13 现在完成时.ppt

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1、 Practice Production Unit 13Present Perfect Tense 现在完成时现在完成时 Presentation Warm up Warm upI ate meals yesterday. I have just eaten meals. Now I am not hungry, I dont want to eat meals. I did homework two years ago. I have already done my homework. Now I finish, I can go out to play. I read the book l

2、ast year. I have already read the book. Now I have knownsomething about this book. I cleaned the room. I have cleaned the room. Now this room is clean. Warm up请大家看上面的几组句子，每一组句子中，前一句是一般请大家看上面的几组句子，每一组句子中，前一句是一般过去时的句子，过去时表示过去某时发生的动作或单纯叙过去时的句子，过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作；后一句是现在完成时的句子，述过去的事情，强调动作；后一句是

3、现在完成时的句子，表示过去发生或已完成的某个动作对现在产生的影响或结表示过去发生或已完成的某个动作对现在产生的影响或结果，强调的是过去的事情对现在的影响或结果。果，强调的是过去的事情对现在的影响或结果。 Presentation Look and Say Presentation Sentences用下划线画出现在完成时的结构。（肯定式，否定式，疑问用下划线画出现在完成时的结构。（肯定式，否定式，疑问式）式）We have seen the film. Have you seen the film? No, we havent. We havent seen the film.I have f

4、inished the homework. Have you finished the homework? No, I havent. I havent finished my work. Presentation SentencesI have already arrived. Have you arrived yet? No, I havent. I havent arrived yet.She has just washed the clothes. Has she washed the clothes yet? No, she hasnt. She hasnt washed her c

5、lothes yet. Presentation SentencesI have ever read this book. Have you read this book? No, I havent.I have never read this book. Presentation Sentences用法：用法：表示过去发生或已完成的某个动作对现在产生的影响表示过去发生或已完成的某个动作对现在产生的影响或结果，同或结果，同already, just, yet等状语连用。例：等状语连用。例：I have just turned off the light. 我刚刚把灯关上。我刚刚把灯关上。(结果

6、是灯已经关上了结果是灯已经关上了) I have already read the book. 我已读过这本书了。我已读过这本书了。(结果是已知道这本书的内容结果是已知道这本书的内容) He hasnt found his eraser yet. 他还没有找到橡皮。他还没有找到橡皮。 Presentation Sentences注意：副词注意：副词 just 常用于肯定句中，放在常用于肯定句中，放在have / has后；而后；而already多用于肯定句中，可放在句中也可放在句末表示强多用于肯定句中，可放在句中也可放在句末表示强调；调；yet 一般用于疑问和否定句中，译为：一般用于疑问和否定

7、句中，译为：“还、仍然、或还、仍然、或已经已经”。Have you finished your homework yet? 你还没有完成作业吗？你还没有完成作业吗？ Presentation Sentences have been to和和have gone to的区别：的区别：have been to 强调强调“去过去过”，现已不在那里，如：，现已不在那里，如：He has been to the USA three times.他他(曾经曾经)到美国去过三次。到美国去过三次。(他人生中有过这样的经历，过去他人生中有过这样的经历，过去“到过美国到过美国”，现在已，现在已“不在美国了不在美国了

8、”)He has gone to the USA. 他已经去美国了。他已经去美国了。(主要强调的是主要强调的是“去了去了”，也许刚动身出发，也许已经到了，也许还在路上，也许刚动身出发，也许已经到了，也许还在路上，总之现在人不在说话的现场。总之现在人不在说话的现场。) Presentation Sentences have been to 和和have been in的区别的区别 have been to强调人强调人“已回到原地已回到原地”，后面可接表示，后面可接表示“次次数数”的状语。例：的状语。例： She has been to Shanghai only once. 她只去过一次上海。她

9、只去过一次上海。 How many times has he been to Shanghai? 他去过几次上海？他去过几次上海？ Hes been there many times. 他去过很多次。他去过很多次。 have been in表示某人表示某人“已在某地停留一段时间，现仍在已在某地停留一段时间，现仍在那里那里”，其后常带表示一段时间的状语。例：，其后常带表示一段时间的状语。例：They have been at the barbers shop for half an hour. 他们在理发店呆了半小时。他们在理发店呆了半小时。(现在仍然在理发店现在仍然在理发店)We have b

10、een in Xian for two weeks. 我们在西安呆了两个多星期。我们在西安呆了两个多星期。(现仍在西安现仍在西安) How long have they been in China? 他们在中国呆了多长时间了？他们在中国呆了多长时间了？(仍在中国仍在中国) Presentation Sentences 现在完成时态中可以和表示一段时间状语现在完成时态中可以和表示一段时间状语(for, since, how long, all ones life)连用的动词必须是表示延续的情况或动连用的动词必须是表示延续的情况或动作的动词，即延续性动词，常与作的动词，即延续性动词，常与since

11、, for等连用。等连用。She has taught in the school for ten years. 她在这所学校教书已经她在这所学校教书已经10年了。年了。 I havent eaten anything since breakfast. 我从早饭起就一直没有吃东西。我从早饭起就一直没有吃东西。 I have known her since we were children. 我从小就认识她。我从小就认识她。 注意：注意：since与时间点相连，而与时间点相连，而for与时间段相连。与时间段相连。 现在完成时现在完成时构成构成肯定句：主语肯定句：主语+ have(has)+ 过去

12、分词过去分词 +其他其他. .一般疑问句：一般疑问句： Have (Has ) + 主语主语+ 过去分词过去分词 +其他其他? ?否定句：主语否定句：主语+ have(has)+ not +过去分词过去分词 +其他其他. .用法用法与不确定的副词与不确定的副词相连。如：相连。如：just, already, yet, once, twice, ever, never等。等。当有表示一段时当有表示一段时间的词汇间的词汇for 或或since时，要与延时，要与延续性动词相连。续性动词相连。have been to, have gone to, have been in 词词的区别。的区别。 Pre

13、sentation Grammar Box表格呈现表格呈现 Practice Oral Practice说出下面动词的过去式及过去分词说出下面动词的过去式及过去分词am, is _ _ are _ _buy _ _ take _ _have / has _ _ run _ _tell _ _ go _ _teach _ _ do _ _wasbeenbeenwereboughtboughttooktakenhadhadranruntoldtoldwentgonetaughttaughtdiddone Practice Oral Practice按要求完成句子，并朗读句子。按要求完成句子，并朗读

14、句子。I have written this book before. (变为一般疑问句变为一般疑问句) _ _ written this book before？He has already found the key to the door. (变否定句变否定句) He _ _ the key to the door _. Have you ever been to the Great Wall? (做否定回答做否定回答) No, _ _.He went to Hong Kong two years ago. (改为同义句改为同义句) He _ _ _ Hong Kong for two

15、years.Have youhasnt foundyet I haventhas been to Practice Oral PracticeI have kept the book for 3 days. (对划线处提问对划线处提问) _ _ have you kept the book？ He has already finished the book. (改为一般疑问句并改为一般疑问句并做肯定、否定回答做肯定、否定回答) _ he finished the book _? Yes, he _. / No, he _.The bus has arrived here. It arrived

16、 ten minutes ago. (把两句合为一句把两句合为一句)_How longHasyethashasntThe bus has arrived here for ten minutes. Practice Oral Practice用用for和和since填空，并朗读句子填空，并朗读句子He has lived in Changchun _ the year before last year. I have known her _ we were children. Our teacher has learned English _ over three years.She has

17、been away from this city _ ten years ago.It is about ten years _ she left the city.sincesinceforsincesince Practice Oral Practice( ) Li Ping has been in Beijing twice. A B C D( ) Where is Li Fei? He has been to the post office. A B C D ( ) Li Ping knew him for two years. A B C D改错，并朗读正确句子改错，并朗读正确句子C

18、BAknew改为改为“has known” in改为改为“to”has been 改为改为“has gone” Practice Oral Practice( ) My parents have worked here since two years. A B C D( ) I have bought this book for one day. A B C D( ) The factory has open since 1989. A B C DDsince改为改为forbought改为改为keptBopen改为改为been openedC Practice Oral PracticeIt

19、_ (rain) for a week.I dont know this woman. I _ (meet, never) her.Lets go to the cinema. No, I _ (see, already) the film.We _ (finish, not) our homework yet. John _ (be, not) here yet. He will be back in a minute.用适当的时态填空，说出正确句子。用适当的时态填空，说出正确句子。has rainedhave never methave already seenhavent finishe

20、dhasnt been Practice Oral PracticeMr. Green often goes to America. In fact, he _ (be) there for ten times. Wheres John? He _ just _ (go) to the teachers office.She _ (learn) English since she was ten. Jim isnt here. He _ (go) to the library. He _ (go) there an hour ago. He _ (travel, never) on a tra

21、in in her life.has been hasgonehas learnthas gonewenthas never traveled Practice Oral Practice( ) He has _ been to Shanghai, has he? A. already B. never C. ever D. still( ) Have you met Mr Li _? A. just B. ago C. before D. a moment ago( ) The famous writer _ one new book in the past two years. A. is

22、 writing B. was writing C. wrote D. has written 单项选择，并朗读单项选择，并朗读BCD Practice Oral Practice( ) _ you _ your homework yet? Yes. I _ it a moment ago. A. Did; do; finished B. Have; done; finished C. Have; done; have finished D. will; do; finish( ) His father _ the Party since 1978. A. joined B. has join

23、ed C. was in D. has been inDD( ) Do you know him well? Sure. We _ friends since ten years ago. A. were B. have been C. have become D. have made( ) How long have you _ here? About two months. A. been B. gone C. come D. arrived Practice Oral PracticeBA Practice Exercise 1forPractice Exercise 2yetPract

24、ice Exercise 3wentgone Practice Exercise 1forsincesincesincesincePractice Exercise 2yetalreadyyethave gone has gone Has been has beenhas beenhavebeenPractice Exercise 3wentdanceddancedgoneplayedplayedworkedworkedputput Practice 小结小结 Practice 小结小结 Practice 小结小结Production Grammar ShowHave you ever bee

25、n to the aquarium?I have been to the aquarium.I have never been to the aquarium.I have never been to Water Park.Have you ever been to Disneyland?Production 小升初真枪实练小升初真枪实练( ) 1. He _ finished his homework yet. A. doesnt B. havent C. hasnt D. doesnt have( ) 2. _ you ever _ to Nanjing? Yes, I _there last year.A. Havegone; have gone B. Havebeen; went C. Didgo; went D. Didgo; has beenCBProduction QuizProduction Quiz