现在完成时讲解课件

1、现在完成时present(now)futurepast 现在完成时现在完成时( present perfect tense)do my homework 现在完成时的构成现在完成时的构成主菜单上一页下一页have (hashave (has）+ + 过去分词过去分词Mother: John, clean your teeth please.John: Mum, I them.现在完成时的基本句型：现在完成时的基本句型：肯定式：肯定式：主语 + 助动词have/has + 动词的过去分词. 疑问式：疑问式：助动词Have/Has + 主语 + 动词的过去分词?否定式否定式: 主语 + 助动词ha

2、ve/has + not + 动词的过去分词. 例句：例句：6. Has he gone to the library ? 他是去了图书馆吗？Yes ,he has. 是的，是去那里了。No, he hasnt. 不，他没去那里。7. How long has Mrs Smith been in Beijing？Smith夫人来北京多长时间了？ 现在完成时的主要用法现在完成时的主要用法上一页下一页- Its so dark.- Its so dark.-Someone has turned off the light.-Someone has turned off the light.(有人刚

3、把灯关了有人刚把灯关了,对现在造成的结果是对现在造成的结果是:现在很黑现在很黑)- Are you free?-I have finished my homework. I am free-I have finished my homework. I am free( (我已我已经经完成了家庭作完成了家庭作业业,对现在造成的结果是很有空对现在造成的结果是很有空)主菜单1. 1.表示过去发生的某一动作对现在造成的影响或结果。表示过去发生的某一动作对现在造成的影响或结果。 上一页下一页I have learnt English for more than I have learnt English

4、 for more than ten years. ten years.我已经学了我已经学了10多年的英语。多年的英语。(从从10年前开始年前开始,持续到现在还在学持续到现在还在学)She has swum since half an hour ago.我已经游泳了半个小时我已经游泳了半个小时(半个小时前已经开始游泳半个小时前已经开始游泳,到现在还在游到现在还在游)现在完成时的主要用法现在完成时的主要用法主菜单2.2.表示表示过去过去已经开始已经开始, , 持续到持续到现在的动作或状现在的动作或状态态. .常与常与since + since + 过去的时间点，过去的时间点，for + for

5、+ 一段时一段时间，间，so far so far 等时间状语连用。等时间状语连用。3.3.表示人曾有过或到目前为止从表示人曾有过或到目前为止从未有过的未有过的经历经历. .上一页下一页I haveI have ever ever beenbeen to the Summer Palace? to the Summer Palace?(我曾去过颐和园我曾去过颐和园) I I havehave never never had had a car.a car. (我从未有过汽车。我从未有过汽车。)主菜单1. 1.表示过去发生的某一动作对现在造成的影响或结果。表示过去发生的某一动作对现在造成的影响或

6、结果。 2.2.表示表示过去过去已经开始已经开始, , 持续到持续到现在的动作或状态现在的动作或状态, ,3.3.表示人曾有过或到目前为止从未有过的表示人曾有过或到目前为止从未有过的经历经历现在完成时的运用现在完成时的运用(1):1在表示“用法1”时，现在完成时常和副词already, yet, never, ever ,before ,just等连用。a）already 往往用于肯定句，用在疑问句时表示强往往用于肯定句，用在疑问句时表示强 调或加强语气；调或加强语气；yet 用于否定句和疑问句。用于否定句和疑问句。 He has already left here. 他已经离开这里了。 Ha

7、s he already left here? 他（真的）已经离开这里了吗？（表示加强语气） My teachers havent had breakfast yet. 我的老师们还没有吃早饭。 Have you written to your parents yet? 你已经给你父母写过信了吗？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. I havent had breakfast yet. Have you had breakfast yet?b） never 是否定词，表示是否定词，表示“从来没有

8、从来没有”，而，而ever 表表示示“曾经曾经” We have never been to the Great Wall. 我们从来没有去过长城。 Have you ever been to Canada? 你们曾经去过加拿大吗？ c） just表示表示“刚刚刚刚”（用于完成时态时，与（用于完成时态时，与already，never 等副词的位置一样，多用在助动词等副词的位置一样，多用在助动词have/has和和动词过去分词之间）动词过去分词之间） He has just come back. 他刚刚回来。 They have just finished the work. 他们刚刚完成那项工

9、作。现在完成时的现在完成时的时间状语时间状语常与常与already, already, never, never, ever, ever, just, just, yet, yet, before, before, up to now, up to now, so far, so far, for the last few weeksfor the last few weeks these days, these days, since since for a long timefor a long time 连用连用上一页下一页主菜单1.for +Eg. I have been here f

10、or 5 weeks. Hes studied English for 3 years.一段时间一段时间2. since +从句(一般过去时) 单词 词组 (表示过去某一时间的)时间点时间点Eg. I have been here since 2000. I have been here since 5 years ago. I have been here since I graduated in 2000.since: (自自以来以来)1)since+时间点时间点He has stayed here since 5 oclock.2)since+ 时间段时间段+ agoHe has sta

11、yed here since 5 hours ago.3)since+ 从句从句She has taught English since he came here. for: (长达）长达）for+ 时间段时间段He has kept the book for 2 weeks.since , for 的用法的用法: 注1): since 也可单独使用, 表示“自那时起”; 另外since前也可加上ever,以加强语气.Eg. I have been here (ever) since I graduated in 2000.注2): 对for或since引导的时间状语提问 必须用how lon

12、g, 决不能用when.Eg. *I have lived here for 10 years.How long have you lived here?*She has stood here since 2 hour ago.How long has she stood here?短暂性动词与延续动词间的转换leavcome/go (to) arrive (at/in) get (to)reachbuyborrowfinish be away (from) be (in/at) be (in/at) be (in/at)be (in/at)havekeepbe overjoinstart/b

13、egindiecloseopenreturnmarrybecomebe in/be a/anbe onbe deadbe closedbe openbe backbe married be短暂性短暂性动词与时间段的关系动词与时间段的关系 短暂性动词在肯定句、疑问句中短暂性动词在肯定句、疑问句中不能与时不能与时间段连用间段连用，这些动词是：，这些动词是：等。等。上一页下一页为了表述这种意思为了表述这种意思, ,我们常用相应的我们常用相应的来代替短暂性动词。来代替短暂性动词。主菜单 但在否定句中，短暂性动词可以与但在否定句中，短暂性动词可以与时间段连用。时间段连用。如：如：I havent bou

14、ght the bike for a year. I havent bought the bike for a year. 我买这辆自行车还不到一年。我买这辆自行车还不到一年。She hasnt come here for an hour. She hasnt come here for an hour. 她来这儿还没有一个小时。她来这儿还没有一个小时。上一页下一页主菜单 翻翻 译译 练练 习：习： 1. 1.我买了这块手表五年了。我买了这块手表五年了。 2. 2.这位老人已经死了十年了。这位老人已经死了十年了。 3. 3.他已经回来三天了。他已经回来三天了。 4. 4.自从六点钟他就来这儿了

15、。自从六点钟他就来这儿了。 5. 5.我离开家乡已十年了。我离开家乡已十年了。WW下一页上一页主菜单have been 与have gone 的用法比较 1.have been to 意思是意思是“到过，去过到过，去过”表示表示曾经到过某处曾经到过某处，但现在人不在那儿。，但现在人不在那儿。 Eg.Has she ever been to Nanjing?Has she ever been to Nanjing?2.have gone to 意思是意思是“去了去了”，表示，表示已经已经去了去了某地，现在人可能在去的途中或已在那某地，现在人可能在去的途中或已在那儿了。儿了。Eg.You have

16、 been in Beijing for 2 years.Eg.You have been in Beijing for 2 years.3.have been in 意思是意思是“呆在某处一段时间呆在某处一段时间了了 Eg.She has gone to Nanjing. Eg.She has gone to Nanjing. 与一般过去时的用法比较一一. .现在完成时和一般过去时都是说过现在完成时和一般过去时都是说过去的事情，去的事情，; ;而一而一般过去时，则只般过去时，则只讲述讲述发生在过去的发生在过去的动作和事情动作和事情与现在没有关系与现在没有关系。 上一页下一页主菜单eg：He

17、has bought an English-Chinese dictionary. 他已经买了一本英汉字典。他已经买了一本英汉字典。 He bought an English-Chinese dictionary. 他曾买过一本英汉字典。他曾买过一本英汉字典。上一页下一页第一句用现在完成时时态，想表达意为：第一句用现在完成时时态，想表达意为：“He He bought an English-Chinese dictionary. And bought an English-Chinese dictionary. And he still has it” “he still has it” “过

18、去他买了一本英汉字典，过去他买了一本英汉字典，现在他还有这本字典现在他还有这本字典” ” 。第二句用过去时只叙述过去他买过一本英汉字第二句用过去时只叙述过去他买过一本英汉字典这一事实，至于现在他是否有这本字典并未强典这一事实，至于现在他是否有这本字典并未强 调说明。调说明。主菜单二当有一个表示二当有一个表示过去某一特定时间过去某一特定时间的状语时，不用现在完成时，而用的状语时，不用现在完成时，而用一般过去时一般过去时: : 上一页下一页eg: I saw the film on television yesterday . 但但since(since(自自以来以来)+)+某一过去时间或叙某一过

19、去时间或叙述过去事情的从句总是与现在完成时述过去事情的从句总是与现在完成时连用。连用。eg： They have known each other since 1950 . Since he was a child ,he has lived in England.主菜单三常与一般过去时连用的典型的三常与一般过去时连用的典型的 表示过去时间的状语表示过去时间的状语: :上一页下一页yesterday(yesterday(昨天昨天), the day before yesterday(), the day before yesterday(前天前天), ),just now(just now(刚

20、才刚才) )， 时间时间+ ago, + ago, last +last +时间时间 等等; ; eg: The plane took off ten minutes ago. We finished our task last week .主菜单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(过去过去) Eg. It is five years since I joined the army.=Five years has passed since I joined the army.动动 词

21、词 填填 空：空： 1._ you _(clean) the room?1._ you _(clean) the room? Yes, we _(do) that Yes, we _(do) that already.already. When _ you _(do) it? When _ you _(do) it? We _(do) it We _(do) it an hour ago.an hour ago.2._ he _(see) this film 2._ he _(see) this film yet?yet? Yes. Yes. When _ he _(see) it? When

22、 _ he _(see) it? He _ it He _ it last week. last week. 3. How many times _you_(be) there? 3. How many times _you_(be) there? 下一页上一页主菜单4. I _ (read) the novel twice. Its interesting.4. I _ (read) the novel twice. Its interesting.5. She _(go) to Pairs, hasnt she? Yes.5. She _(go) to Pairs, hasnt she?

23、Yes. How _ she _(go) there? How _ she _(go) there? She _(go) there by air. She _(go) there by air.6. 6. So farSo far, many countries _(develop) , many countries _(develop) their software programs. their software programs.7.Mr Chen _(give)up smoking 7.Mr Chen _(give)up smoking last year.last year.8.M

24、r Chen _(give) up smoking 8.Mr Chen _(give) up smoking since last year.since last year.下一页上一页主菜单选用选用 forfor和和 sincesince填空填空: :1.We havent seen each other _ a long time.1.We havent seen each other _ a long time.2.His father has been in the Party _ 10 years 2.His father has been in the Party _ 10 yea

25、rs ago.ago.3.The film has been on _ 20 minutes.3.The film has been on _ 20 minutes.4.Mr Green has worked here _ he came to 4.Mr Green has worked here _ he came to China.China.5.His grandparents have been dead _ several 5.His grandparents have been dead _ several years.years.6. Its five years _ we me

26、t last time.6. Its five years _ we met last time.下一页上一页主菜单用用Have been to, have gone to, have been in 填空填空1.1.Mike and his parents _ the north Mike and his parents _ the north for half a year.for half a year.2.2.Mum is not at home now. she _ the Mum is not at home now. she _ the shop.shop.3.3._ you e

27、ver _ to kunming ? Never._ you ever _ to kunming ? Never.4.4.Where _ you _ these days?Where _ you _ these days?5.5.Has Jim arrived yet?Has Jim arrived yet? Yes, he _ here for several days. Yes, he _ here for several days.6.6.Where is Peter? I dont know where he Where is Peter? I dont know where he _

28、._.7.7.Hi Jim! Where _ you _ ? Li Lei Hi Jim! Where _ you _ ? Li Lei is looking for you. is looking for you.下一页上一页主菜单改改 错错1. How long have you begun to study English?2. I have borrowed this book for two weeks.3. The river has become very dirty since last August.4. Our manager is away today. He has been to Guangzhou on business.5. He has gone out for two years.下一页上一页主菜单1. The house is dirty. We _it for weeks. A didnt clean B hadnt cleaned C dont clean D havent cleaned2. - I