1、人教选择性必修第三册 Unit 4 Discover Useful Structures学习目标学习目标12To learn the function and meaning of the present perfect continuous tense To practice the present perfect continuous tense by completing some exercises目标一：目标一：To learn the function and meaning of the present perfect continuous tenseActivity 1:Loo
2、k at the sentence in the present perfect continuous tense.Find more examples from the previous text.EXAMPLE This is the adventure that I have been dreaming of.We are now camped on the ice and we have been managing to survive,We have been struggling for days,but Activity 2:Discuss and summarise the f
3、unction of the present perfect continuous tense.Task 1 Compare the sentences with the present perfect tense.Question 1:Which tense is used to emphasise the continuation of the action?l This is the adventure that I have been dreaming of.l This is the adventure that I have dreamt of.Question 2:Which t
4、ense is used to talk about a finished action,and which is about an unfinished action?l We have been managing to survive.l We have managed to survive.Question 3:Which tense is used to emphasise the length of time?l We have been struggling for days.l We have struggled for days.Task 2 Read each situati
5、on and rewrite each sentence using the present perfect continuous tense.1.The dog started to bark about two hours ago.I really hope it will stop soon.The dog has been barking about two hours ago.I really hope it will stop soon.2.Steve started to play rugby at the age of eight.Now he has become a pro
6、fessional player.3.Timmy is holding a table tennis bat and his short hair is damp with sweat.He looks a little tired after playing table tennis for two hours.4.Diane hasnt got much sleep this week.She looks terrible today.5.I tried to phone you this morning.I must have tried a dozen times before I c
7、aught you here.Steve has been playing rugby at the age of eight.Now he has become a professional player.Diane hasnt been sleeping well this week.She looks terrible today.I have been trying to phone you this morning.I must have tried a dozen times before I caught you here.Timmy has been holding a tab
8、le tennis bat and his short hair is damp with sweat.He looks a little tired after playing table tennis for two hours.1.Did this action start from the past and last/repeat till now?2.Is it likely that this action will continue in the future?3.Is the speaker expressing strong emotion in this sentence?
9、4.Is the speaker trying to emphasise the action has lasted long?SentenceStarted from the pastand last/repeat till nowBe likely to continuein the futureImply strongemotionEmphasise the actionhas lasted longSentence 1 Sentence 2 Sentence 3 Sentence 4 Sentence 5 现在完成进行时现在完成进行时1.意义：意义：表示过去发生的动作或状况一直持续到现
10、在，这个动作可能仍在继续进行或刚刚结束。2.现在完成进行时的句式现在完成进行时的句式肯定句：肯定句：主语+have/has+been+现在分词.e.g.Ive been trying to find out her telephone number.否定句否定句：主语+have/has+not+been+现在分词.e.g.Ive not been feeling very well for the past few days.一般疑问句一般疑问句：Have/Has+主语+been+现在分词.?Yes,主语+have/has（been+现在分词.）.No,主语+have/has+not（been
11、+现在分词.）特殊疑问句：特殊疑问句：疑问代词/疑问副词+have/has+主语+been+现在分词.?3.用法用法1)表示过去发生并持续到现在的动作e.g.How long have you been learning English?2)表示现在经常重复的动作e.g.Jack has been phoning Jane every night for the last week.3)用于得出结论e.g.His eyes are red.He has been working too hard recently.现在完成进行时与现在完成时现在完成进行时与现在完成时1.现在完成时通常表示动作已
12、完成，而现在完成进行时却不一定如此。e.g.I have looked for a suitable school all around the city.（已经不找了）I have been looking for a suitable school all around the city.（一直在找）2.现在完成时通常表示反复发生的动作，可用how many times询问动作完成的次数；现在完成进行时通常表示持续不间断的动作，一般用how long询问动作持续的时间。e.g.How many times have you visited the museum?（强调动作的重复性）How
13、long have you been working in the company?（强调动作的延续性）3.许多静态动词只能用于现在完成时而不能用于现在完成进行时。e.g.Hes a lovely dog how long have you had him?The boy has admitted his mistake.4.already，ever，never，yet等副词通常不用于现在完成进行时。5.现在完成时一般表示平铺直叙；现在完成进行时含有感情色彩。e.g.I have studied English for 8 years.(陈述客观事实)Henry has been doing
14、his work orderly.(含有赞赏表扬的意味)目标二：目标二：To practice the present perfect continuous tense by completing some exercises Activity 1:Complete the sentences blow using the correct tenses of the verbs in brackets.Then explain your reasons to your partner.1.For the whole morning,the board of the directors _(di
15、scuss)the resolution to increase wages in the coming year.2.Jasons only recreation is painting.He _(learn)how to paint for over five years.3.Even though we lost the game,we should be proud of ourselves because we _(try)our best and _(work)as a team.4.He finally _(finish)the research paper under his
16、tutors guidance.5.My nephew Sam _(collect)comic books since he was five.Now he has more than two hundred of them.6.The company _(launch)an advertising campaign to promote its corporate image.have been discussinghas been learningtriedworkedfinishedhas been collectingis launching/has launched/launched
17、Activity 2:Work in pairs.Interview your partner about the things that he/she has been doing.The following questions might help you.l Do you have any hobbies or interests?l How long have you been learning/playing?l What have you been doing recently?Sample Conversation A:Do you have any hobbies?B:Sure
18、.I have several hobbies such as table tennis,photography,and kite flying.But my favourite hobby is playing the guitar.A:How long have you been learning the guitar?B:I have been learning the guitar since I was eight years old.I saw a video of someone playing and I fell in love with it.A:Thats great.学习总结学习总结1.Summaries the function and meaning of the present perfect continuous tense.2.Say the difference between the present perfect continuous tense and the present perfect tense.
