2021新版人教版选修三英语Unit 4 Discover useful structures ppt课件.pptx

1、To learn the present perfect continuous tense To practice the present perfect continuous tense by completing some exercises 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 Look at the

2、 sentence in the present perfect continuous tense. Find more examples from the previous text and discuss the function of the tense. Past Present Future He is visiting the doctor. The use of the present perfect continuous tense. have / has been + v-ing We use present perfect continuous tense for acti

3、ons that started in the past and continue in the present. Past Present Future The use of the present perfect continuous tense. have / has been + v-ing We use present perfect continuous tense for actions that started in the past and have just finished but have consequences in the present. 1. 现在完成进行时表

4、示动作从过去某一时间开现在完成进行时表示动作从过去某一时间开 始，一直始，一直持续到现在持续到现在，或者始于过去，现在，或者始于过去，现在 刚刚终止，但注重的是刚刚终止，但注重的是结果结果。 eg You have been saying that for five years. Im fed up with it. Toms hands are very dirty. He has been repairing the car. 2. 现在完成进行时表示现在完成进行时表示过去某一动作的过去某一动作的延续性延续性 和和重复性重复性，并常带有较强的感情色彩，并常带有较强的感情色彩。 eg Lil

5、y has been doing her homework since 4 oclock this afternoon. According to your teacher, you havent been doing your homework these days. 3. 常常与与all this time, this week / month, all night, all the morning / afternoon, recently等时间等时间状状 语以及语以及由由since或或for引导的时间状语引导的时间状语连用。连用。 eg Ive been writing letters

6、 all this evening and Ive just finished them. She has been expecting a long distance call all night long. 现在完成进行时与现在完成现在完成进行时与现在完成时时 1. 现在完成时通常表示现在完成时通常表示动作已动作已完成，而现在完成，而现在 完成进行时却不一定如此。如：完成进行时却不一定如此。如： I have looked for a suitable school all around the city. （已经不找了）（已经不找了） I have been looking for a

7、suitable school all around the city. （一直在找）（一直在找） 2. 现在完成时通常表示反复发生的动作，可用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，一完成进行时通常表示持续不间断的动作，一 般用般用how long询问动作持续的时间。如：询问动作持续的时间。如： How many times have you visited the museum?（强调动作的重复性）（强调动作的重复性） How long have you been workin

8、g in the company? （强调动作的延续性）（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。如：用于现在完成进行时。如： Hes a lovely dog how long have you had him? The boy has admitted his mistake. 4. already，ever，never，yet等等副词通常不副词通常不 用于现在用于现在完成进行时。完成进行时。 5. 现在完成时一般表示平铺直叙；现在完成进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。试比较行时含有感

9、情色彩。试比较： I have studied English for 8 years. Henry has been doing his work orderly. 含有赞赏表扬的意味含有赞赏表扬的意味 陈述客观事实陈述客观事实 1. 北京卷北京卷 -Excuse me, which movie are you waiting for? -The new Star Wars. We _ here for more than two hours. A. waited B. wait C. would be waiting D. have been waiting D 2. 江苏卷江苏卷 Das

10、han, who _ crosstalk, the Chinese comedic tradition, for decades, wants to mix it up with the Western stand-up tradition. A. will be learning B. is learning C. had been learning D. has been learning D 3. 福建卷福建卷 -Where is Peter? I cant find him anywhere. -He went to the library after breakfast and _

11、(write) his essay there ever since. 4. 江西卷江西卷 -Tony, why are your eyes red? -I _ (cut) up peppers for the last five minutes. has been writing have been cutting 5. 北京北京卷卷 Chinas high-speed railways _ (grow) from 9,000 to 25,000 kilometers in the past few years. 6. 湖南卷湖南卷 Since the time humankind star

12、ted gardening, we _ (try) to make our environment more beautiful. have grown have been trying Read each situation and write a sentence that best describes it. 1. The dog started to bark about two hours ago. I really hope it will stop soon. The dog has been barking for about two hours. I really hope

13、it will stop soon. v. 吠叫吠叫 2. Steve started to play rugby at the age of eight. Now he has become a professional player. n. 橄榄球运动橄榄球运动 Steve has been playing rugby since eight. Now he has become a professional player. adj. 潮湿的潮湿的 3. Timmy is holding a table tennis bat and his short hair is damp with

14、sweat. He looks a little tired after playing table tennis for two hours. _ _ _ _ Timmy is holding a table tennis bat and his short hair is damp with sweat. He has been playing table tennis for two hours, so he looks a little tired. n. 球拍球拍 4. Diane hasnt got much sleep this week. She looks terrible

15、today. _ _ 5. I tried to phone you this morning. I must have tried a dozen times before I caught you here. _ _ _ Diane hasnt been sleeping enough this week. She looks terrible today. I have been trying to phone you all this morning. I must have tried a dozen times before I caught you here. Complete

16、the sentences below 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 _ (discuss) the resolution to increase wages in the coming year. 2. Jasons only recreation is painting. He _ (learn) how to paint for

17、 over five years. has been discussing n. 娱乐；消遣娱乐；消遣 has been learning n. 侄子；外甥侄子；外甥 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 tutors guidance. 5. My nephew Sam _ (collect)

18、 comic books since he was five. Now he has more than two hundred of them. had tried finished worked has been collecting n. 指导指导 n. 广告活动广告活动 6. The company _ _ (launch) an advertising campaign to promote its corporate image. adj. 公司的公司的 launched / will launch / is launching / has launched Interview y

19、our partner about the things that he / she has been doing. The following questions might help you. Do you have any hobbies or interests? How long have you been learning / playing ? What have you been doing recently? 现在完成进行时表示动作从过去某一时间开现在完成进行时表示动作从过去某一时间开 始一直延续到现在，这个动作可能刚刚停止，始一直延续到现在，这个动作可能刚刚停止， 也可能还

20、在也可能还在进行进行, ,常带有一定的感情色彩。常带有一定的感情色彩。 其其 构成为构成为“have / has + been + 动词动词-ing形式”。形式”。 eg Ive been painting the door this morning. They have been working very well this term. 用括号内动词的正确时态完成下面短文。用括号内动词的正确时态完成下面短文。 A big elephant was walking on the ground. He 1. _ (move) through the tall grass for two days

21、, eating and resting. Not far from him 2. _ (stand) a woman with a big camera in her hands. She took another photo of the elephant, still amazed at his long tusks. had been moving stood Swallowing a mouthful of grass, the elephant turned his head to see that the woman 3. _ (take) even more photos of

22、 him. “That woman has no manners. She 4. _ (follow) me all day,” he thought. “She 5. _ (take) 100 photos of me and 6. _ (write) 42 pages of notes. But she hasnt even given me a single peanut!” was taking has been following has taken written Write a short report about the things that your partner has been doing recently according to your interview. Remember to use the present perfect continuous tense.