Unit 4 Discover useful structures现在完成进行时 ppt课件 -（2022新）人教版高中英语选择性必修第三册.pptx

1、Discover useful structuresthe present perfect continuous tense 1. 现在完成进行时的用法2. 现在完成进行时与现在完成时的区别3. 巩固练习目录CONTENTS1. This is the adventure that I have been dreaming of.2. We are now camped on the rice and we have been managing to survive, but spring is coming, and the ice will soon begin to melt.3. We

2、 have been struggling for days, but things on Elephant Island are going from bad to worse.4. She has been sleeping for 6 hours and still cant wake up. The Present Perfect Continuous Tense基本结构：基本结构：“have / has been + 现分现分” Observe the following sentences and pay attention to the highlighted words.hav

3、e/has been doing现在完成进行时现在完成进行时含义：现在完成进行时表示动作从过去过去某一时间开始，一直持续到现在现在，或者刚刚终止，或者可能还要继续继续进行进行下去。基本结构：基本结构： 主语主语+have/has been doingPastnowFuture用法：1.表示动作从过去过去某时开始一直到说话时还在进行一直到说话时还在进行或可能还要可能还要继续下去继续下去。(1) I have been learning English since I was 8 years old and I still love it.(2) Chinese have been making

4、paper for two thousand years.2.表示不久前刚刚结束刚刚结束的动作。这种意义通常根据上下文来判断。(1) I have been cutting up peppers for the last five minutes.(2) We have been waiting for you for half an hour.(3) Her eyes are red. Its obvious that she has been crying for a long time. 3.表示在一段持续的时间内动作的多次重复多次重复，而这个重复的动作在说话时并不一定在进行不一定在进行

5、。(1) Weve all along been making mistakes like this. 我们一直犯这样的错误。 (2) Jim has been phoning Jenny every night for the past week. 一星期以来吉姆每天晚上给詹妮打电话。 4.表示某种强烈的感情色彩,如：赞赏、批评、愤怒赞赏、批评、愤怒等。(1)Tom has always been working hard.(2) Why are you late again? I have been waiting for you for two hours. 赞许的感情色彩赞许的感情色彩

6、愤怒愤怒常用的时间状语：，如all day（一整天），all morning（一上午）； ，等等e.g：He has been working all day.They have been planting trees this month. (1)兼具现在完成时及现在进行时的特点;(2)可以表示某一动作对现在产生的结果或影响;(3)也可以表示某一动作的延续性、临时性、重 复性、生动性及感情色彩。1. The dog started to bark about two hours ago.I really hope it will stop soon.2. Steve started to p

7、lay rugby at the age of eight. Now he has become a professional 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. has been barking for about two hours. I really hope it will stop soon.Steve has been

8、playing rugby since the age of eight. Now he has become a professional player.Read each situation and rewrite each sentence using the present perfect continuous tense. Timmy is holding a table tennis bat and his short hair is damp with sweat. He looks a little tired because he has been playing table

9、 tennis for two hours.3. I tried to phone you this morning. I must have tried a dozen times before I caught you here.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 caught you here.Diane hasnt been sleep

10、ing 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.I have been trying to phone you this morning. I must have tried a dozen times before I caught you here.现在完成时和现在完成进行时的比较 相同点：相同点：1. 动作都发生在过去与现在有联系动作都发生在过去与

11、现在有联系2. 都与一段时间连用都与一段时间连用Compare& discover:I have made a cake. 我做了一个蛋糕。I have been making a cake. 我一直在做一个蛋糕。She has painted a picture. 她画了一幅画。She has been painting a picture. 她在画一幅画。（已做好）（不一定做好了）（已画好）（可能还没画好）1. 现在完成时现在完成时 强调动作行为的影响或结果；强调动作行为的影响或结果； 现在完成进行时现在完成进行时 强调动作未完成和动作本身强调动作未完成和动作本身Summary: 现在完成

12、进行时现在完成进行时 可以表示动作的反复性；可以表示动作的反复性； 现在完成时现在完成时 经常表单个事件一般不表示动作的反复。经常表单个事件一般不表示动作的反复。 I have been taking part in races for four years. 我这四年我这四年一直一直在参加比赛。在参加比赛。 I have taken part in races. 我已经参加了比赛。我已经参加了比赛。2.Summary:动作的反复性动作的反复性单个事件单个事件3. A. _ have you visited Egypt this month? I have visited Egypt twic

13、e this month. (过去往返埃及和居住地, 但现在已回来) B. _ have you been touring Egypt? I have been touring Egypt for two month. (过去一段时间一直待在埃及, 没有离开过)How many timesHow long 现在完成时现在完成时 多用来询问和表达一个已经结束的动作或活动所完成多用来询问和表达一个已经结束的动作或活动所完成的分量和频率，提问时用的分量和频率，提问时用how many times； 现在完成进行时现在完成进行时 多用来询问和表达一个正在发生的动作或活动延多用来询问和表达一个正在发生的

14、动作或活动延续多长时间续多长时间，提问时用提问时用how long。Summary:4. 现在完成时现在完成时 通常只说明一个事实，一种影响或结果；通常只说明一个事实，一种影响或结果； 现在完成进行时现在完成进行时 比较生动，有时含有明显的感情色彩比较生动，有时含有明显的感情色彩（喜悦喜悦、愤怒愤怒、不满不满、厌恶厌恶）等。I have waited for you for two hours. I have been waiting for you for two hours.Summary:如： I have lived been living here for 30 years. 我在这

15、儿住了30年了。 How long have you worked been working here? 你在这里工作多久了? 状态动词:be，have，exist等。 情感动词:like，love，hate等。 感觉动词:see，hear，know，feel，sound等。 短暂性动词:finish，marry get up，come, go 等5.6.1. For the whole morning, the board of the directors _ (discuss) the resolution to increase wages in the coming year.2. J

16、asons 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 tutors guidance.5. My nephew Sam _ (collect) comi

17、c 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.has been discussinghas been learninghave been tryingworkingfinishedhas been collectingis launching/has launched/ launchedComplete the sentences below using the correct tenses of the verbs in brackets. P41 3