高中英语必修三 Unit 4 Period 3 Discovering Useful Structures教案

1、21世纪教育网 精品试卷第2页 （共2页）新人教版（2019）英语必修三Unit 4Period 3 Discovering Useful Structures教学设计课题Period 3 Discovering Useful Structures单元Unit 4 Space Exploration学科English教材分析During this period, the class will focus on discovering useful structures.Students are expected to get insight into knowledge about infin

2、itives.The teachers would inspire students to practice the functions of infinitives.教学目标与核心素养Learn and master the key words and phrases.Train the students ability to use infinitives.Enable the students know about the meaning and functions of infinitives.Encourage students to learn more about space e

3、xploration.重点Master the usage of key words and phrases.Improve the students ability to use infinitives.难点Let students master how to use infinitives.教学过程教学环节教师活动学生活动设计意图Daily routineStep 1Warm upT greets the whole class as usual.Activate Ss and remind them to concentrate.Step 2Preview checkT asks Ss

4、the meaning of words, phrases and knowledge points learnt last lesson.Students answer the questions loudly together.Check the teaching situation of last lesson quickly.Help Ss consolidate the knowledge points.Lead-inStep 3What powers a spacecraft?Spacecraft have instruments to help them take picture

5、s and collect information in space. But they need electricity to power those instruments and send the information back to Earth. Where does the power come from?A spacecraft generally gets its energy from at least one of three power sources: The Sun, batteries or unstable atoms. To choose the best ty

6、pe of power for a spacecraft, engineers consider where it is traveling, what it plans to do there and how long it will need to work.How many “to” in the text?Do you know their meanings and functions?After getting the information and the meaning of the new words, answer the questions.Use pictures to

7、catch Ss attention.Expand their horizons and spark their interest.Step 4New wordsT explain the meaning of the new words, and ask Ss to translate the meaning of the whole sentence.Please call before you come, otherwise we might not be home. They charged the accident to the lack of experience These ma

8、terials can be recycled into other packaging products. It goes beyond our research. Current success does not mean success in the future. We have provided sufficient information to you on this issue. Let them figure out the answer without you.Teach the meaning of new words.Step 5Lets playT choses Ss

9、to answer the questions.Be modest, _ you will lag behind. _ of food and supplies caused disaffection among the soldiers.They _ empty tins so as to use the metal. The contents go far _ the title. Even though they are a step in the right direction, our_ processes are not enough. They had no evidence _

10、 to hold him.Father is trying to figure _ his tax.keys:1. otherwise 2. lack 3. recycle 4. beyond 5. current 6. sufficient 7. outFamiliarize the new wordsClear the tackle of next step.Useful StructuresStep 6Lets learnTeacher shows the questions and asks students to answer.Look at the following senten

11、ces and focus on the italicized infinitives. In pairs, discuss their functions and meanings.I trained for a long time to fly airplanes as a fighter pilot.As we all know, an astronaut needs to be healthy and calm in order to work in space.First of all, you must be intelligent enough to get a related

12、college degree.Some scientists were determined to help humans realize their dream to explore space.On 12 April 1961, Yuri Gagarin became the first person in the world to go into space. Rewrite the sentences using infinitives or “in order to/so as to + do”. Change the italicized parts accordinglyIn 2

13、003 Yuri Malenchenko became the first person who got married in space. In space, astronauts collect all dirty water so that it can be recycled for later use.Mankind has always been curious about the universe and many people, have dreamt that one day they would fly into space.Astronauts bones and mus

14、cles can get very weak in space due to the lack of gravity, so they need to exercise every day, which will help them stay healthy.Astronauts have to use tape to stick everything down while working in space because everything would float off otherwise.During a spacewalk, astronauts have to move slowl

15、y so that they can keep their bodies under control.Keys:1. In 2003 Yuri Malenchenko became the first person to get married in space. 2. In space, astronauts collect all dirty water so as to recycle for later use.3. Mankind has always been curious about the universe and many people to dream that one

16、day they would fly into space. 4. Astronauts bones and muscles can get very weak in space due to the lack of gravity, so they need to exercise every day in order to help them stay healthy. 5. Astronauts have to use tape to stick everything down to work in space because everything would float off oth

17、erwise.6. During a spacewalk, astronauts have to move slowly so as to keep their bodies under control.Complete the passage with the correct forms of the verbs in brackets.Sending people to other planets or even beyond the solar system is not an easy goal _(achieve). One of the problems is that the t

18、rip would take over two years _(get) to the closest planet, Mars, and back. Although light is the fastest thing _(know) in the universe, it could take more than four years to reach the nearest star system. Will scientists figure out a way _(store) sufficient food and water for the long journey? Is i

19、t possible to travel faster than light? No one knows the answers yet. However, space scientists never give up. They are experimenting with growing crops in space so as _(help) astronauts get enough food on longer journeys through space.Keys:1. to achieve2. to get3. to know4. to store5. to helpDo the

20、 practice and express the reasons.Familiarize students with key structures.Exercise students structures using skills.Step 7Infinitives1.做主语-不定式置于句首To get there by bike will take us half an hour.To make up for lost time is not possible.To lean out of the window is dangerous.To save money now seems im

21、possible.2. 做主语-用it作形式主语，把真正的主语不定式置于句后Its our duty to take good care of the old. How long did it take you to finish the work? It seemed impossible to save money.3. 作宾语I happen to know the answer to your question.The question is how to put it into practice.I find it difficult to learn English well.4.

22、 作补语Father will not allow us to play on the street.We believe him to be guilty.The book is believed to be uninteresting.5. 作定语Scientists were determined to help humans realize their dream to explore space.On 12 April 1961, Yuri Gagarin became the first person in the world to go into space.Sending pe

23、ople to other planets or even beyond the solar system is not an easy goal to achieve.Jessie got a new toy to play with.She has no friend to depend on.6. 作状语Scientists work hard to find out the secrets of the universe.As we all know, an astronaut needs to be healthy and calm in order to work in space

24、.You must be intelligent enough to get a related college degree.Im afraid the whole process is too complicate to explain in a few words.We were surprised to find that he had already left.PracticeThe driver failed _(see) the other car in time.He feels it his duty _(help) the poor.It is difficult for

25、us _(finish) writing the composition in a quarter of an hour.Its a great honor _(invite) to Marys birthday party.There is nothing _(do) now.keys: to seeto helpto finishto be invitedto doLets play1. Q: Why is Yang Liwei famous in China?A: Because he is _（第一个进入太空的中国宇航员）2. Q: How do you feel about the

26、film 2001: A Space Odssey?A: Im afraid the film is _（太长太乏味而无法看完）3. Q: Why was the Russian space station Mir(和平空间号) brought down out of orbit?A: One of the reasons is that Mir was too old and _（不再是安全的居所）4. Q: Would you like to travel into space one day?A: Yes, and I want to become _（登录火星的第一个中国人）5. Q:

27、 Could you provide a simple introduction to how space rockets work?A: Im afraid the whole process is _（太复杂了，无法用几句话解释清楚）keys: the first Chinese astronaut to go into space.t too long and too boring to finish.no longer to be safe to live.the first Chinese to step onto Mars.too complex to explain in a f

28、ew words.Students learn the functions of infinitives and read sentences.Get the useful structures.Step 8DiscussionTeacher shows the topic and gives students examples to discuss.Share your ideas and your life with your patterner!EXAMPLE:I think _ is too difficult/easy/complex/interesting to _.I think

29、 _ enough to _.I hope scientists will invent a _ to _.I think we need to find a _ to _.I _so as to _.Use what they have learnt to discuss in groups.Voice their opinions.Practice their team spirit.Practice their thinking skill and imagination.Practice their speaking and listening.Step 9Language point

30、sT explains the language points and makes some exercise.recycle vt.回收利用；再利用recycle bin 回收站internal recycle 内部循环Plastic bags cause the deaths of 100, 000 Marine animals each year when the animals mistake them for food, so if you must use them, always recycle them in the bin at your supermarket.塑料袋每年会

31、导致100,000海洋动物死亡，因为这些动物常常把塑料袋误当食物吞下去，因此，如果你一定要用塑料袋，一定要在超市垃圾箱回收塑料袋。lack n.缺乏；短缺 vt.没有；缺乏for lack of 因缺乏;因缺少have no lack of 不缺乏；不缺少lack sth. 缺乏某物lack of faith 不信教，不信神The flowers failed for lack of rain. 由于缺少雨水，花凋谢了。Lack of sleep blunted her thinking. 缺少睡眠使她的思想变得迟钝。They lack the force of conviction.他们缺乏

32、信念的力量。otherwise adv.否则；要不然or otherwise 或相反；或其反面otherwise than 不像；除外and otherwise 等等Only by saving will you have money in the bank _ otherwise invested.只有存钱你才能够在银行有存款或在其他方面进行投资。I know him otherwise _ in business. 在生意以外我也认识他的。In the kindergarten, the children learn singing, dancing, drawing _ otherwis

33、e. 孩子们在幼儿园里学唱歌、跳舞、画画等等。keys: or; than; and beyond prep.在更远处；超出beyond all reason 不合理的；不理智的beyond control 无法控制beyond doubt 无容置疑beyond the reach of 无法达到；超出的能力之外beyond words 难以言表beyond challenge 无与伦比beyond expectation 出乎意料beyond the scope of 超出范围The teacher teaches us to push beyond where we thought we

34、could go.老师教我们超越我们原以为只能够到达的地方。You cannot judge any man beyond your knowledge of him, and how small is your knowledge.你判断一个人不可能超过你对他的了解，而你的了解又是多么肤浅。current adj.当前的；现在的 n.水流；电流；思潮air current 气流ascending air current 上升气流battery current 电池电流current asset 流动资产There are no current bottlenecks at all on th

35、is system.在这个系统中，当前不存在任何瓶颈。sufficient adj.足够的，充足的be sufficient for 对足够more than sufficient 绰绰有余sufficient sleeping 睡眠充足necessary and sufficient condition 充要条件Typically, five days of classroom training is sufficient for application developers who are already familiar with enterprise application devel

36、opment.一般说来，5天的课堂培训对于一个已熟悉企业开发环境的应用程序开发者来讲是足够的。figure out 弄懂；弄清楚；弄明白figure on 计划figure for 谋取，企图获得figure in 算进；包括进Maybe well figure out how to do something different.也许我们会想出如何做些不同的事。Help students know about the knowledge points deeper.Let students know how to use these words and phrases.Step 10Exerc

37、iseT asks Ss to fill the gap together.1.The space shuttle(航天飞机) was created as a reusable launch vehicle _astronauts and other equipment into space and back again. The shuttle looks like an ordinary plane but it has a cargo bay(货仓) that is large enough _ a satellite.2.Space probes(航天探测器) are often s

38、ent to places that are too far away or too dangerous for a human _ foot in. For example, in 1977, the Voyager I space probe was sent _ pictures of the planets Saturn and Jupiter.3.The International Space Station was too big _ on Earth and _ into space, so different countries worked together and built about 100 modules(分离舱). Afterwards, these modules were joined together in space _