Unit 3 Grammar and usageppt课件-（2020）新牛津译林版高中英语选择性必修第二册 (1).pptx

1、 Unit 3 Fit for lifeGrammar and usagePresent perfect continuous tensehttps:/ done+ be doinghas/have (be doing) nehas/have been doing1.公式推导现在完成时进行时After I lost my right hand in a car accident ten years ago, I began to withdraw into myself, believing I would never be able to lead a normal life again.

2、I was equipped with an artificial hand, but it did not feel like part of me. Even simple things like getting dressed were unbelievably difficult. Three months ago, however, all that changed when I was given the chance to test a new robotic hand.Scientists have been making great progress in robotic t

3、echnology in recent years, and their work on robotic limbs has really changed my life. With my new hand, I can move my individual fingers and hold on to small things like pens and pencils. More amazingly, my robotic hand is capable of feeling varying degrees of pressure, just like a real hand. In ad

4、dition, it looks very lifelike with special rubber used on the outside.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. I have rediscovered hobbies I had enjoyed before my accident. For example, I have been cooking for m

5、y family again since I got my new hand. Not only can I do more, but I have also become more confident and outgoing. Im so grateful for all the new possibilities my robotic hand has opened up.Scientists have been making great progress in robotic technology in recent years, Over the past three months

6、I have been testing out the limits of what I can do with my new hand, , I have been cooking for my family again since I got my new hand.Sentences use the present perfect continuous tense:https:/ Liao has been working hard for ten years.从过去到现在并且一直在持续进行完美包含两个时态的含义（现在完成 + 进行时）强调动作的连续进行性或者反复重复性，译成“一直；连续

7、”现在完成进行时2.现在完成进行时的含义3.现在完成进行时的3种主要用法动作从过去开始一直持续到现在还有可能继续动作从过去开始，持续到刚好说话者讲话结束表示动作的反复出现I have been living in Yangzheng since 2020.I have been teaching English for 2 years.动作从过去开始一直持续到现在还有可能继续过去开始，持续刚好说话者讲话结束I have been waiting for you for 3 hours.I am sorry I am late.Have you been waiting long？I have

8、been thinking about you. She has been painting the house all the afternoon.The boy has been eating since five minutes ago. 与all this time, this week / month,all night, all the morning / afternoon, recently等时间状语连用以及由since或for引导的时间状语连用。Working out the rules We use the present perfect continuous tense

9、to talk about an action that started in the past and is still continuing now, or an action that has just finished but is still connected with (1) _ (the past/the present/ the future) in some way. The verb form of the present perfect continuous tense is “(2) _”.the presenthave / has been doing4.现在完成进

10、行时和现在进行时的主要区别It has been raining since Halloween. It is raining.现在进行时强调动作正在进行。现在完成进行时强调一直在做。5.现在完成进行时和现在完成时的主要区别现在完成时强调动作行为的结果、影响。现在完成进行时只强调动作行为本身。The car is going again now.Tom has repaired it.Toms hand are very dirty.He has been repairing the car. I have finished my homework. I have been doing my

11、homework.已完成还在做我已经做完了我的作业。我一直在做作业。 pastfuturenowread dohave read pastfuturenowread dohave been reading do现在完成时现在完成时现在完成进行时现在完成进行时刚结束刚结束动作仍在继续动作仍在继续 I have studied English for 10 years. I have been studying English for 10 years.（只强调已经完成，不确定中间是否中断）（既强调完成又强调没有中断 ）大多数现在完成进行时的句子不等同于现在完成时。表示状态的非延续性动作不能用于现

12、在完成进行时（love；like；hate；leave)现在完成时和现在完成进行时的区别口诀现在完成表完成中断与否不可知完成进行亦完成一直持续未放弃I _(learn) about twenty English words this morning.It _(rain) now.The little boy_(struggle) to be attentive, but cant help falling asleep.have learnt/learnedis raininghas been strugglingPractice makes perfect.1. I _ (read) boo

13、ks about positive thinking recently and I will write about it in my article.2. -Will you apply to a university in Beijing? -I havent decided yet. 1_(think) about it, though.3. Mick took some music lessons during the holidays and now he_(learn) to play the guitar.4. I think this is the best short sto

14、ry you_ (write). Why not have it published?P70 have been readingam thinking/have been thinkingis learninghave written5 -Has Alice found a new job yet? -Not yet, but she_(take) job interviews for weeks.6 Im confident that our team will win the competition because we_(work) hard for almost a year.7 It

15、_(rain) heavily all day. I wish it would stop soon.8 - -Sorry Im late._ you_ (wait) long? - -No, Ive just arrived.P70 has been takinghave been workinghas ben rainingHave;been waitingIve been running through the jungle ,Ive been running with the wolves, to get you ,to get you .wolves我在丛林中不断奔跑，我同狼群一同前行，只为追寻你，追寻你。Thank you!