2022-2023学年人教版（2019）选择性必修第三册 Unit 4 Adversity and Courage Discover Useful Structures课件（24张）

1、Discover useful structures【版本：新人教册别：选择性必修三】UNIT 4 ADVERSITY AND COURAGE目录页contentsThe structure of the present perfect continuous tenseThree usages of the present perfect continuous tenseThe comparison between the present perfect continuous tense and the past perfect continuous tenseInstant exercise

2、sHomeworkThe structure of the present perfect continuous tenseThe present perfect continuous tense现在完成进行时1. 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 have b

3、een struggling for days, but things on Elephant Island are going from bad to worse.Lead-in: Observe and discover The Present Perfect Continuous Tense基本结构：“have / has been + 现在分词” 基本含义：表示动作从过去某一时间开始一直持续到现在，可能刚刚停止，也可能仍在继续。SummarizePresentPastFutureThree usages of the present perfect continuous tense1.

4、 The artist has been painting the picture for 3 hours, but he has not finished it yet.2. You have been designing solar racing cars for a long time.3. He _ (study) aliens (外星人) since 2010. The usage of the tense (1) （1）现在完成进行时态表示动作还未结束，还要继续持续下去。 has been studying试比较：1. The artist has painted the pict

5、ure.2. I have designed five or six different cars so far.现在完成时态强调动作已经完成。1. All these days he has been writing articles to our magazine.2. He has been promising to help you. Hasnt he done it?3. I _ (take) part in races for about four years.4. Jack _ (phone) Jane every night for the last week.（2）表示动作并

6、不是一直不停地进行，而是在断断续续地重复。have been takinghas been phoningThe usage of the tense (2) 1. Tom has always been working hard.2. Time has been flying so quickly!3. What have you been doing to my dictionary? （3）带有感情色彩，使语言表达更加生动。What kind of emotion does the writer express in these sentences?赞许的感情色彩感叹时间之快不满的感情色

7、彩The usage of the tense (3) The comparison between the present perfect continuous tense and the past perfect continuous tense 1. Tom had been texting his pen pal for four years. 2. Tom has been texting his pen pal for four years . 1. She had been suffering from a bad cold when she took the exam. 2.

8、She has been suffering from a bad cold since she took the exam.present perfect continuous tense vs past perfect continuous tenseTry to compare the following two sets of sentences.过去完成进行时表示过去一段时间内一直在做的事情，现在已经终止了；现在完成进行时表示过去某个时段一直做着一件事，并到现在还在继续。1. I _ (look) for it for days before I found it.2. You _

9、(say) that for three years.3. Tom _ (give) a talk to a large group of people, the same talk I _ (give) to half a dozen other groups.4. By this time next week, I _ (work) for this company for 6 years.5. What is the price of petrol these days? Oh, it _ (rise) sharply since last month.Have a tryhad bee

10、n looking have been saying gavehad givenwill have workedhas risen即学即练Instant exercisesPractice makes perfect.1. People _ (pour) into stadiums since the days of ancient Greece. (2021 全国乙卷)2. For the biggest stadiums in the world, we _(use) data supplied by the World Atlas list so far, which _ (rank)

11、them by their stated permanent capacity, as well as updated information from official stadium websites. (2021 全国乙卷)3. You know, I _ (look) for a job for three months, and this is my first formal interview.have usedhave been pouringrankshave been looking4. Marty _(work) hard on his book and thinks he

12、 _ (finish) it by Friday.5. Hi, Tom, you look tired. I am tired. I _ (paint) the living room all day.6. I asked where they _ (stay) all those days.have been paintinghas been workingwill have finished had been stayingPractice makes perfect. Food supplies in the flood-stricken area _ (run) out. We mus

13、t act immediately before theres none left. Up to now, the program _ (save) thousands of children who would otherwise have died. It _ (report) that many a new house _ (rebuild) at present in the disaster area. Police _ (search) for a woman now who is reported to _ (miss) since the flood _ (hit) the a

14、rea last Friday. are runninghas savedis reportedis being rebuiltare searchinghave been missinghitPractice makes perfect. 语篇填空 Last month, the Japanese government _ (express) their thanks for the aid they _ (receive) from China. The construction of the two new railway lines _ (complete) by now. The p

15、rime minister hopes that the people will be better off when he quits than when he _ (start). We hope people living in disaster areas _ (return) to their normal life as soon as possible.expressedhad receivedhas been completedstartedwill returnPractice makes perfect. 语篇填空3. Without Frank and Ernest, w

16、ed all be dead by now. 不是有弗兰克和欧内斯特，我们到现在早就没命了。(P39)(1) Wed be better off without them _ neighbours.(2) Im very near-sighted without glasses _.(3) They debated for hours without a decision _(take).(4) Without another word _ (exchange), they started off.(5) Without anyone _ (help), how can we go on?as

17、 on being takenexchangedto helpLanguage points: Important sentences (P37 P39)Observe and FindLanguage points: Important sentences (P37 P39)without 宾语 宾语补足语用法如下：(1) without + 宾语 + 介词（见例句1）(2) without + 宾语 + 副词（见例句2）(3) without + 宾语 + 动名词（见例句3）(4) without + 宾语 + 过去分词（见例句4）(5) without + 宾语 + 不定式（见例句5）s

18、ummary without在虚拟语气中的用法：1. without 表示将来时间虚拟语气的情况：I dont know what we _ (do) without you. 2. without 表示过去时间虚拟语气的情况：Without their support, the project _ (be) successful. 3. without 表示现在时间虚拟语气的情况：Without air, there _ (be) living things in the world now. would not have beenwould dowouldnt beLanguage points: Important sentences (P37 P39)Compare and Findwithout 在虚拟语气中的用法总结：1. 在将来时中，主句用 would / should / could / might + do 2. 在过去时中，主句用 would / should / could / might + have done3. 在现在时中，主句用 would / should / could / might + do Language points: Important sentences (P37 P39