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Unit 3 Lesson 3 Grammar and usage课件-(2020)新牛津译林版高中英语高二选择性必修第二册.pptx

1、Unit 3 Fit for lifeGrammar and usage1. Dont disturb me. Im working.2. Ive been working all the morning. Now I want to have a rest.1. We need an umbrella. Its raining outside.1. Hurry up! They are waiting for us!Compare the following examples. 2. They have been waiting for two hours.2. The ground is

2、wet. It has been raining.Present continuous tense We use the present continuous tense for things happening at or around the time of speaking. The action is not complete. The verb form of present continuous tense is “am/is/are doing”. nowpastpresent continuousfuturePresent perfect continuous tense We

3、 use the present perfect continuous tense to talk about an action that started in the past and is still continuing now, or an action that has justfinished but is still connected with the present in some way. The verb form of present perfect continuous tense is “have/has been doing”. nowpastfuture pr

4、esent perfect continuousLook at more examples.1. Listen! Lily is singing. She has been singing for one hour, and I hope she can have a break.2. Jane is learning English. How long has she been learning English?3. Tom is watching TV. He has been watching TV all day.More usage of present continuous ten

5、se Present continuous tense can be used for future plans and arrangements. Verbs are often used in such kinds of cases like go, come, stay, leave and so on.1. Im leaving tomorrow.2. The bus is coming.Present continuous tense is also used with the adverbs like always, constantly, continually, forever

6、 and so on to express the action happens too often, or more often than normal.1. Tim is always complaining.2. My son is always playing computer games.More usage of present perfect continuous tense We can use present perfect continuous tense for actions repeated over a period of time.Every morning th

7、ey meet in the cafe. They have been going there for years. Lets do some exercises!1. _ (Lucy / learn) Chinese for two years.2. Why _ (you / look) at me like that? Stop it!3. Titan is a teacher. _ (she / teach) for sixteen years.4. _ (I / think) about what you said and Ive decided to take your advice

8、.5. “Is Jack on holiday this week?” “No, _ (he / work).”6. Sally is very tired. _ (she / work) all the week.Exercise one: Put the verb into the present continuous or present perfect continuous.Lucy has been learningare you lookingShe has been teachingI have been thinkinghe is workingShe has been wor

9、king1. I _ (reflect) on the article I read about ancient medicine all day.2. I _ (wait) for two hours to see the doctor but it is still not my turn yet. 3. Now I _ (plan) my schedule for the summer trip.4. What are you doing? I _ (look) for Mary. Do you know where she is?5. Be quick! Your parents _

10、(expect) you.Exercise two: Fill the blanks with the correct forms of the verbs in the brackets.have been reflectinghave been waitingam planningam lookingare expecting6. My mother _ (write) a report on the new treatment all morning. She hopes to finish it tonight.7. Scientists _ (do) research on the

11、disease since it was first discovered in the early 20th century.8. The water supply has been cut off temporarily, because the workers _ (repair) the main pipes.9. Please dont disturb me. I _ (try) to work.10. The company _ (make) herbal medicines for more than 100 years.has been writinghave been doi

12、ngare repairingam tryinghas been making1. 我写信来向您介绍我的新手。2. 近些年,科学家们在机器人技术上不断取得巨大的进步。他们对于机器手的研究确实改变了我的生活。Exercise three: Translate the following Chinese sentences into English using present perfect continuous tense or present continuous tense.Scientists have been making great progress in robotic techn

13、ology in recent years, and their work on robotic limbs has really changed my life. Im writing to introduce my new hand to you. 3. 比如,自从我有了机器手,我又一直在为家人们做饭了。4. 在过去的三个月里,我一直在测试用新的机器手做事的限制之处。它不断地让我惊讶。Over the past three months I have been testing out the limits of what I can do with my new hand, and it constantly surprises me. For example, I have been cooking for my family againsince I got my new hand. 5. 我一直认为机器人研究是极其重要的。我也总是在寻找各种方法参与其中。6. 期待您的回信。Believing that robot research is extremely important, Im always looking for ways to participate in it. Im expecting to hear from you.

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