
1. In Picture 1 and Picture 2, where do you think they are from? How do you know?From their wearings, we can know they are from ethnic minority of China--- Miao and Dong.Picture 1, they are playing their traditional instrument lusheng in their traditional costumes.Picture 2. the girls are Miao because they wear their traditional costumes and silver accessory.2. In Picture 3, can you find which village it is? What time is it in the picture?It is Dong village. It is at night. Step 2 While-listeningJustin met a new friend while traveling in Guizhou. Listen to their conversation and complete the summaries below.Part 1Justin and Wu Yue watched some Miao people play the lusheng. The instrument has a history of over 3,000 years and it is even mentioned in the oldest collection of Chinese poetry. Then they watched the lusheng dance. Justin wanted to buy some hand-made silver/traditional accessories as souvenirs. He was told that the price will depend on the percentage of silver. Part 2They will go to a pretty Dong minority village called Zhaoxing. they will see the drum towers and the wind and rain bridges. They may also see a performance of the Grand Song of the Dong people.Step 3 Post-listening---TalkingWork in groups. Imagine Justin is telling some friends about his trip to Guizhou. One of you is Justin and the rest of you are his friends. Ask Justin questions about his trip and experience. The following expressions may help you.

The topic of this part is “Describe a place with distinctive cultural identity”.This section focuses on Chinese culture by introducing Chinatown, whose purpose is to show the relationship between the Chinese culture and American culture. The Chinese culture in Chinatown is an important part of American culture. Chinatown is an important window of spreading Chinese culture and the spirit homeland of oversea Chinese, where foreigners can experience Chinese culture by themselves.Concretely, the title is “Welcome to Chinatown!”, from which we can know that the article aims at introducing Chinatown. The author used the “Introduction--Body Paragraph--Conclusion” to describe the people, language, architecture, business, famous food and drinks and people’s activities, which can be a centre for Chinese culture and shows its unique charm.1. Read quickly to get main idea; read carefully to get the detailed information.2. Learn the characteristics of writing and language.3. Learn to introduce your own town according to the text.4. Learn to correct others’ writing.1. Learn the characteristics of writing and language.2. Learn to introduce your own town according to the text.Step 1 Lead in ---Small talkIn the reading part, we mentioned the Chinatown of San Francisco. How much do you know about Chinatown of San Francisco ?Chinatown is a main living place for Chinese immigrants, where you can see many Chinese-style buildings, costumes, operas, restaurants, music and even hear Chinese.Step 2 Before reading ---Predict the contentWhat is the writer’s purpose of writing this text ? How do you know ?From the title(Welcome to Chinatown) and some key words from the text(tourist, visit, visitors, experience), we can know the purpose of the text is to introduce Chinatown and show the relationship between Chinese culture and American culture.

Discuss these questions in groups.Q1: Have you ever been to a place that has a diverse culture ? What do you think about the culture diversity ?One culturally diverse place that I have been to is Harbin, the capital city of Heilongjiang Province. I went there last year with my family to see the Ice and Snow Festival, and I was amazed at how the culture as different to most other Chinese cities. There is a big Russian influence there, with beautiful Russian architecture and lots of interesting restaurants. I learnt that Harbin is called “the Oriental Moscow” and that many Russians settled there to help build the railway over 100 years ago.Q2: What are the benefits and challenges of cultural diversity ?The benefits: People are able to experience a wide variety of cultures, making their lives more interesting, and it can deepen the feelings for our national culture, it is also helpful for us to learn about other outstanding culture, which helps improve the ability to respect others. The challenges: People may have trouble communicating or understanding each other, and it may lead to disappearance of some civilizations and even make some people think “The western moon is rounder than his own.”Step 7 Post reading---RetellComplete the passage according to the text.Today, I arrived back in San Francisco, and it feels good (1) _____(be) back in the city again. The city succeeded in (2)_________ (rebuild) itself after the earthquake that (3)________ (occur) in 1906, and I stayed in the Mission District, enjoying some delicious noodles mixed with cultures. In the afternoon, I headed to a local museum (4)____ showed the historical changes in California. During the gold rush, many Chinese arrived, and some opened up shops and restaurants in Chinatown to earn a (5)_____ (live). Many others worked on (6)______ (farm), joined the gold rush, or went to build the railway that connected California to the east. The museum showed us (7)____ America was built by immigrants from (8)________ (difference) countries and cultures. In the evening, I went to Chinatown, and ate in a Cantonese restaurant that served food on (9)________(beauty) china plates. Tomorrow evening, I’m going to (10)__ jazz bar in the Richmond District. 答案:1. to be 2. rebuilding 3. occurred 4. that 5.living6. farms 7.how 8. different 9. beautiful 10. a

導(dǎo)語在必修第一冊中,我們研究了函數(shù)的單調(diào)性,并利用函數(shù)單調(diào)性等知識,定性的研究了一次函數(shù)、指數(shù)函數(shù)、對數(shù)函數(shù)增長速度的差異,知道“對數(shù)增長” 是越來越慢的,“指數(shù)爆炸” 比“直線上升” 快得多,進一步的能否精確定量的刻畫變化速度的快慢呢,下面我們就來研究這個問題。新知探究問題1 高臺跳水運動員的速度高臺跳水運動中,運動員在運動過程中的重心相對于水面的高度h(單位:m)與起跳后的時間t(單位:s)存在函數(shù)關(guān)系h(t)=-4.9t2+4.8t+11.如何描述用運動員從起跳到入水的過程中運動的快慢程度呢?直覺告訴我們,運動員從起跳到入水的過程中,在上升階段運動的越來越慢,在下降階段運動的越來越快,我們可以把整個運動時間段分成許多小段,用運動員在每段時間內(nèi)的平均速度v ?近似的描述它的運動狀態(tài)。

活動一:課本第三頁的活動題,把學(xué)生分成幾組然后讓他們讀圖討論,思考書上的幾個問題,最后派個代表回答問題.最后教師做適當?shù)难a充:人口的自然增長不僅與人口自然增長率有關(guān),而且還與人口基數(shù)有關(guān).活動二:課本第七頁的活動,先讓兩位學(xué)生閱讀第六頁的案例結(jié)合活動題思考問題,讓幾個組學(xué)生討論所給的幾個問題.讓學(xué)生歸納最后教師做適當?shù)难a充.時間安排:由于本節(jié)內(nèi)容不難因此整個教學(xué)過程是一節(jié)課的時間來完成的因此在教學(xué)過程中注意時間的把握,在做活動和討論時注意把握時間,自己盡量少說廢話.課堂小結(jié)通過這一節(jié)的學(xué)習,同學(xué)們正確理解和認識人口增長,增長模式和人口增長模式的轉(zhuǎn)變。我們可以利用比較法、分析法來掌握,并聯(lián)系現(xiàn)實生活,進行分析、判斷,化理論知識于實踐之中。

一、說教材【教材分析】本節(jié)課源于人教版必修二第一章第二節(jié)人口的空間變化,該節(jié)主要分為兩部分:人口的遷移和影響因素,對于這兩部分教材的處理很簡單,課標要求為:根據(jù)資料說出人口分布的特點;而考試對于特點這方面也較重視,在本章的內(nèi)容中這節(jié)算次重點,是基于第一節(jié)人口的數(shù)量變化的基礎(chǔ)上講訴的,進而結(jié)合教材和課標制定如下教學(xué)目標。【教學(xué)目標】知識與技能:了解人口遷移的內(nèi)涵,能夠根據(jù)有關(guān)資料說出國際和我國人口遷移的特點;掌握影響人口遷移的因素,能夠分析一地人口遷移的原因,解決實際問題。過程與方法:通過圖表的展示總結(jié)歸納國際國內(nèi)人口遷移的特點,培養(yǎng)學(xué)生讀圖分析,索取所需信息的能力;通過活動探究人口遷移的影響因素,理論聯(lián)系實際。情感態(tài)度與價值觀:培養(yǎng)熱愛祖國熱愛家鄉(xiāng)的情感;學(xué)會尊重他人不要對移民產(chǎn)生歧視,人人平等的情感。【教學(xué)重點】人口遷移分布的特點

一、說教材的地位和作用《細胞中的元素和化合物》是人教版教材生物必修一第二章第1節(jié)內(nèi)容?!都毎械脑睾突衔铩愤@一節(jié),首先在節(jié)的引言中,明確指出自然界的生物體中的元素是生物有選擇地從無機自然界中獲得的,沒有一種元素是細胞特有的。但細胞與非生物相比,各元素的含量又大不相同。說明生物界與非生物界具有統(tǒng)一性和差異性。這部分內(nèi)容較為淺顯,但是結(jié)論非常重要,對于學(xué)生了解生物的物質(zhì)性具有重要意義二、說教學(xué)目標根據(jù)本教材的結(jié)構(gòu)和內(nèi)容分析,結(jié)合著高一年級學(xué)生的認知結(jié)構(gòu)及心理特征,我制定了以下的教學(xué)目標:1、知識目標:知道組成細胞的主要元素;知道為什么碳元素是構(gòu)成細胞的基本元素2、能力目標:學(xué)會檢測生物組織中的糖類、脂肪和蛋白質(zhì)的方法。(1)通過對C元素的分析,說明有機化合物形成的可能性及必然性,初步培養(yǎng)學(xué)生跨學(xué)科綜合分析問題的能力。(2)通過對組成細胞中的元素的百分比的分析,通過對不同化合物的質(zhì)量分數(shù)的學(xué)習,培養(yǎng)學(xué)生理解、思考和分析問題的能力。

(一)本課教材地位分析本課教材的主題是世界格局多極化趨勢的出現(xiàn),在整個單元中有承前啟后的作用,前一課是它的大背景,后一課是它的延續(xù)。本課的核心問題是兩極格局下,20世紀六七十年代世界多極化趨勢的出現(xiàn)。通過走向聯(lián)合的歐洲、迅速崛起的日本、發(fā)展中國家的星期以及中國的崛起三方面內(nèi)容,反映了世界格局多極化趨勢的出現(xiàn)。在教學(xué)中,應(yīng)注意利用學(xué)生對時事的關(guān)心與熟悉,引導(dǎo)學(xué)生進行相應(yīng)的探究活動,使學(xué)生對世界格局的發(fā)展變化能夠認識準確和完整把握。(二)三維目標A.知識與能力1.通過對歐洲一體化的進程、日本經(jīng)濟迅速崛起、不結(jié)盟運動和中國振興的基本史實的學(xué)習,掌握20世紀六七十年代世界多極化趨勢出現(xiàn)的史實,理解其世界大背景和“多極化”的概念。2.通過西歐、日本、中國的崛起,理解經(jīng)濟決定政治,政治反作用于經(jīng)濟。

2.“里根經(jīng)濟學(xué)”和“撒切爾主義”20世紀70年代,世界資本主義經(jīng)濟發(fā)展進入“滯脹”狀態(tài)后,各國政府紛紛尋找醫(yī)治這一新疾病的藥方,其中影響最大的是供應(yīng)學(xué)派和貨幣學(xué)派。1979年,撒切爾夫人上臺擔任英國首相,率先采納了貨幣學(xué)派的主張。1981年,里根擔任美國總統(tǒng)后,以供應(yīng)學(xué)派為依據(jù),確立了自己政府的經(jīng)濟政策。由于兩人的經(jīng)濟政策都在一定程度上緩解了本國的經(jīng)濟危機,并有一套理論體系支撐,因此經(jīng)濟學(xué)家們分別稱之為“里根經(jīng)濟學(xué)”和“撒切爾主義”。實際上,“里根經(jīng)濟學(xué)”和“撒切爾主義”有許多相同之處,二者都提倡自由放任,強調(diào)市場調(diào)節(jié)作用,反對國家干預(yù);二者都實行有利于富人的減稅政策,因此都曾被攻擊為“劫貧濟富”;二者都大力增加軍費開支,用加大政府消費來緩解危機。3.美國“新經(jīng)濟”戰(zhàn)后西方國家在凱恩斯主義指導(dǎo)下,暫時擺脫了三十年代那種嚴重的大蕭條局面,但由于長期實行擴張性財政貨幣政策和對社會需求進行管理的政策,各資本主義國家經(jīng)濟又出現(xiàn)新的危機,即“滯脹”(生產(chǎn)停滯和通貨膨脹),凱恩斯主義由此走向沒落。

什么因素可以阻止種群間基因交流呢?由此可引出隔離的概念。學(xué)生初步理解隔離的概念之后,可以安排學(xué)生討論隔離的各種可能的方式,教師歸納出隔離的類型。然后組織學(xué)生閱讀分析教材中的“資料分析”,組織討論“資料分析”中提出的幾個問題。最后教師應(yīng)強調(diào),一般情況下,地理隔離是生殖隔離的先決條件,生殖隔離一旦形成,原來屬于一個物種的兩個種群,就成了兩個物種。關(guān)于“共同進化與生物多樣性的形成”內(nèi)容的教學(xué),可以學(xué)生自學(xué)為基礎(chǔ),教師提出一些具有啟發(fā)性的問題,師生共同歸納總結(jié)的方式推進教學(xué)過程。使學(xué)生理解共同進化的含義,無機環(huán)境的變化、無機環(huán)境的復(fù)雜化和多樣化、有性生殖的出現(xiàn)和生態(tài)系統(tǒng)結(jié)構(gòu)的復(fù)雜化和多樣化對生物多樣性形成的作用。最后,組織學(xué)生討論生物進化理論在發(fā)展。

一,說教材1. 教材的地位和作用本章課程的核心是介紹現(xiàn)代生物進化理論.生物進化理論的發(fā)展和其他科學(xué)理論的發(fā)展一樣,不是簡單的新理論對舊理論的否定和排斥,而是新理論對舊理論的修正,深入和擴展.從拉馬克的進化學(xué)說到達爾文的自然選擇學(xué)說,以及現(xiàn)代進化理論的由來,大體都走過了這樣的軌跡.這些應(yīng)該成為處理本節(jié)教學(xué)內(nèi)容的基本脈絡(luò).本節(jié)內(nèi)容包括:拉馬克的進化學(xué)說,達爾文的自然選擇學(xué)說和達爾文以后生物進化理論的發(fā)展,其中重點是達爾文的自然選擇學(xué)說.生物進化論不僅是生物學(xué)中具有重要地位的基礎(chǔ)理論,也是對人們的自然觀和世界觀有著重要影響的理論.學(xué)生通過本章內(nèi)容的學(xué)習,不僅可以了解生物進化理論在達爾文之后的發(fā)展,進一步樹立生物進化的觀點和辯證唯物主義觀點,而且能夠通過學(xué)習進化理論的發(fā)展過程,加深對科學(xué)本質(zhì)的理解和感悟.

投影上海市的衛(wèi)星城鎮(zhèn)建設(shè)、交通改善圖以及住房圖等,探討上海為解決城市化的問題做了哪些方面的工作?進一步引導(dǎo)思考總結(jié)對于城市化帶來的問題,除了上海市的做法,你還有什么想法?◆設(shè)計意圖:借上海的例子一方面引導(dǎo)學(xué)生解決問題的思路,讓學(xué)生自己掌握城市化問題及措施,活躍思維;另一方面幫助學(xué)生樹立學(xué)習優(yōu)秀的意識;4.活動設(shè)計.未來展望——生態(tài)城市課本38頁的活動,結(jié)合合肥市環(huán)城公園,解釋生態(tài)城市?!粼O(shè)計意圖:進一步讓學(xué)生認識到人地協(xié)調(diào)的重要性,牢固樹立可持續(xù)發(fā)展的觀念。5.活動設(shè)計分析南京的城市化過程中存在哪些問題,除了共性外,還有沒有自己的個性問題?對于問題展開討論,并提出相應(yīng)的解決措施。◆設(shè)計意圖:結(jié)合身邊的地理,落實鄉(xiāng)土地理的教育,激發(fā)學(xué)生熱愛家鄉(xiāng),從身邊的環(huán)境小事做起,落實環(huán)境教育。

(一)教材的地位與作用本節(jié)教材包括三方面的內(nèi)容,(1)全球氣候在不斷變化之中。(2)全球氣候變化的可能影響。(3)氣候變化的適應(yīng)對策三方面說明氣候變化及其對人類活動的影響。從標準的要求看,學(xué)習的重點不在全球氣候變化本身,而是把全球氣候變化看作是客觀存在的事實,從而探討全球氣候變化對地理環(huán)境及人類活動的影響。從資料中可以看出本節(jié)教學(xué)內(nèi)容涵蓋的時空跨度非常大,思維的鏈索很長很廣,許多問題涉及到學(xué)科的前沿及人類所關(guān)注的熱點,因此,本節(jié)課對學(xué)生而言既有趣味性,又有挑戰(zhàn)性。 (二)教學(xué)目標(1)知識與技能目標:1.通過全球氣候的長期演變圖,學(xué)生了解全球氣候處在波動變化之中。2.通過資料認識全球氣候一直處于變化之中并呈現(xiàn)一定變化周期,了解全球氣候變化對地理環(huán)境及人類活動的影響,能夠提出一些氣候變化的適應(yīng)對策。

一 減數(shù)分裂高一生物減數(shù)分裂說課稿各位評委、老師:大家好,我今天說課的題目是高中生物必修2第二章第一節(jié)〈〈減數(shù)分裂與受精作用〉〉第一部分減數(shù)分裂第一課時精子形成過程。接下來我就從以下幾個方面來說說這一節(jié)課。一、說教材1.教材地位和作用《減數(shù)分裂》這一部分內(nèi)容不僅是第二章的重點內(nèi)容,也是整本書的重點內(nèi)容之一。它以必修一學(xué)過的細胞學(xué)知識、染色體知識、有絲分裂知識和初中生殖種類知識為基礎(chǔ)。通過學(xué)習,使學(xué)生全面認識細胞分裂的種類、實質(zhì)和意義,為后面學(xué)習遺傳和變異,生物的進化奠定細胞學(xué)基礎(chǔ)。2.教學(xué)目標(1)知識目標:掌握減數(shù)分裂的概念和精子的形成過程;理解減數(shù)分裂和受精作用的意義。(2)能力目標:通過觀察減數(shù)分裂過程中染色體的行為變化,培養(yǎng)學(xué)生識圖、繪圖能力以及比較分析和歸納總結(jié)的能力。

一、教材分析下面我來談一談對教材的認識:主要從教材的地位和作用、以及在此基礎(chǔ)上確立的教學(xué)目標、教學(xué)重難點這三個方面來談。首先,來談教材的地位和作用:本課教材內(nèi)容主要從三個方面向?qū)W生介紹了現(xiàn)代中國教育的發(fā)展狀況和趨勢:人民教育的奠基、動亂中的教育和教育的復(fù)興,全面講述了新中國教育的三個階段。本課是文化史中中國史部分的最后一課, 也是必修三冊書中唯一涉及教育的一課。而教育是思想文化史中的重要組成部分,江澤民同志在談到教育的時候曾經(jīng)說過,“百年大計,教育為本。教育為本,在于育人”。教育是關(guān)系國計民生的大事。學(xué)生通過學(xué)習新中國教育發(fā)展的史實,理解“科教興國”、“國運興衰,系于教育”的深刻含義。最終由此激發(fā)學(xué)生樹立“知識改變命運、讀書成就人生”的信念,樹立勤奮學(xué)習、成人成才、報效祖國、服務(wù)社會的崇高理想。故本課的教學(xué)有極大的現(xiàn)實意義。談完了教材的地位和作用,我再分析一下教學(xué)目標:

The topic of this part is “Discover the reasons for festivals and celebrations.The Listening & Speaking & Talking part aims at talking about the experiences and feelings or emotions about the festivals and celebrations. This section aims at detecting the reason why the people celebrate the festivals, the time, the places, the types and the way of celebrations. It also explains why some traditions in the old celebrations are disappearing, like the firecrackers in the big cities and some new things are appearing like the prosperity of business or commerce. 1. Students can talk about what festivals they know and the reasons and the way of celebrating them.2. Students should learn the reading skills such as the headline and get the topic sentences, the structures of articles.3. Students can understand the past, the present situation of some festival around the world and why there are some changes about them. 4. Students can have the international awareness about the festivals.1. Students should learn the reading skills such as the headline and get the topic sentences, the structures of articles.2. Students can understand the past, the present situation of some festival around the world and why there are some changes about them.Step 1 Lead in---Small talkWhat festival do you like best ? Why ?I like the Spring Festivals because I can set off the fireworks, receive the lucky money and enjoy the Gala with my families.Step 2 Before reading---Pair workWhy do people celebrate different festivals ?The Spring Festivals is to celebrate the end of winter and the coming of spring and new life.The Mid-autumn Day is to celebrate the harvest and admire the moon.

Step 3 Analyzing article structureActivity 31. Teachers raise questions to guide students to analyze the chapter structure of this diary and think about how to describe the festival experience. (1)What should be included in the opening/body/closing paragraph(s)?(2)How did the writer arrange his/her ideas?(3)What kind of interesting details did the writer describe?(4)How did the writer describe his/her feelings/emotions during the event?2. Students read and compare the three sentence patterns in activity 2. Try to rewrite the first paragraph of the diary with these three sentence patterns. After that, students exchange corrections with their partners. Such as:●This was my first time spending three days experiencing the Naadam Festival in China’s Inner Mongolia Autonomous Region and it was an enjoyable and exciting experience. ●I'll never forget my experience at the Naadam Festival because it was my first time to watch the exciting Mongolian games of horse racing, wrestling, and archery so closely. ●I'll always remember my first experience at the Naadam Festival in China’s Inner Mongolia Autonomous Region because it was so amazing to spend three days witnessing a grand Mongolian ceremony. Step 4 Accumulation of statementsActivity 41. Ask the students to read the diary again. Look for sentences that express feelings and emotions, especially those with the -ing form and the past participle. Such as:● …h(huán)orse racing, wrestling, and archery, which are all so exciting to watch. ● some amazing performances● I was surprised to see…● I was a little worried about. . . ● feeling really tiredOther emotional statements:●I absolutely enjoyed the archery, too, but the horse races were my favourite part. ●I'm finally back home now, feeling really tired, but celebrating Naadam with my friend was totally worth it. ●He invited me back for the winter to stay in a traditional Mongolian tent and cat hot pot. I can’t wait!2. In addition to the use of the -ing form and the past participle, the teacher should guide the students in the appreciation of these statements, ask them to memorize them, and encourage them to use them reasonably in writing practice.

Example:One day, a poor boy who was trying to pay his way through school by sending newspapers door to door found that he only had one dime(一角)left. He was so hungry that he decided to beg for a meal at the next house.However, he lost his nerve when a lovely young woman opened the door. Instead of a meal he asked for a drink of water. She thought he looked hungry so she brought him a large glass of milk. He drank it slowly, and then asked, “How much do I owe you?” “You don’t owe me anything,” she replied, “Mother has taught me never to accept pay for a kindness.” “Then I thank you from the bottom of my heart.” With these words, Howard Kelly left that house.Years later the woman became badly ill and was finally sent to the hospital in a big city. Dr. Howard Kelly, now famous, was called in. When he heard the name of the town she came from, a strange light filled his eyes. Dressed in his doctor’s clothes, Dr. Kelly went into her room and recognized her at once. From that day on, he gave special attention to her, and decided to do his best to save her life.At last the woman was saved. Dr. Kelly asked the business office to pass the final bill to him. He looked at it and then wrote something on the side. The bill was sent to the woman’s room. She was afraid to open it because she was sure that it would take the rest of her life to pay for it off. Finally she looked, and the note on the side of the bill caught her attention. She read these words: “Paid in full with a glass of milk, Dr. Howard Kelly.” Tear of joy flooded her eyes.

Listening and Speaking introduces the topic of “talking about how to become an astronaut”. This period is aimed to inform students some details about the requirements of being an astronaut. Students can be motivated and inspired by the astronauts. Teachers ought to encourage students to learn from them and let them aim high and dream big.Listening and Talking introduces the theme of "talk about life in space". This part also informs students more details about life in space and can inspire students to be curious about this job. 1. Guide students to listen for numbers concerning dates, years and ages etc2. Cultivate students' ability to talk about how to become an astronaut and life in space ; 3. Instruct students to use functional sentences of the dialogue such as “ first of all, I am not sure, so what might be .. I guess.. I wonder…I am curious…)appropriately.1. Guide students to understand the content of listening texts in terms of the whole and key details; 2. Cultivate students' ability to guess the meaning of words in listening; discuss with their peers how to become a qualified astronaut and describe the life in space.Part 1: Listening and SpeakingStep 1: Lead inPredictionThe teacher can ask students to predict what the listening text is about by looking at the pictures.About how to become an astronaut./the requirements of an astronautStep 2: Then, play the radio which is about an interview a. And after finishing listening for the first time, the students need to solve the following tasks.

The theme of the section is “Describe space facts and efforts to explore space”. Infinitives are one of non-finite verbs, as the subjects, objects, predicative, attributes and adverbials. This unit is about space exploration, which is a significant scientific activity, so every scientific activity has strong planning. Therefore, using the infinitives to show its purpose, explanations or restrictions is the best choice.1. Learn the structure, functions and features of infinitives.2. Learn to summarize some rules about infinitives to show purpose and modify.3. Learn to use infinitives in oral and writing English. 1. Learn the structure, functions and features of infinitives.2. Learn to summarize some rules about infinitives to show purpose and modify.3. Learn to use use infinitives in oral and writing English.Step 1 Lead in---Pair workLook at the following sentences and focus on the italicized infinitives. In pairs, discuss their functions. 1. I trained for a long time to fly airplanes as a fighter pilot..(作目的狀語)2. As we all know, an astronaut needs to be healthy and calm in order to work in space..(作目的狀語)3. First of all, you must be intelligent enough to get a related college degree..(作目的狀語)4. Some scientist were determined to help humans realise their dream to explore space..(作定語)5. On 12 April 1961, Yuri Gagarin became the first person in the world to go into space..(作定語)Summary:1. 不定式的結(jié)構(gòu):to+do原形。2. 分析上面的句子,我們知道在描述太空探索時,動詞不定式不僅可以用來表目的,還可以用來作定語,表修飾。
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