2. 您能看到, 我頭發(fā)太長了。You can see that my hair is much too long.3. 無論什么時候, 只要您想回來就回來。Please come back whenever you want.4. 您僅有很少的頭發(fā)要理! You only have too little hair to cut !5. 為您服務(wù)是我的榮幸!It is my honour to serve you!Step 9 Writing(Henry is walking down the street when he sees a sign for a place that cuts hair. He decides to have it cut. )H=Henry B=BarberH: Good afternoon, I’d like to have my hair cut, if I may. (The barber looks at Henry’s hair and continues cutting another man’s hair. ) Er, I’d really like a haircut. As you can see it’s much too long. B: (in a rude manner) Yes, I can see that. Indeed, I can. H: Fine, well, I’ll have a seat then. (He sits in one of the barber’s chairs. The barber turns to look at Henry. )B: It’s quite expensive here, you know! Are you sure you can afford it?H: Yes. I think so. (After his hair is cut, the barber tells Henry how much he must pay. Henry shows the barber the bank note. )B: Why Mr. . . (looks shocked)H: Adams. Henry Adams. I’m sorry. I don’t have any change. B: Please don’t worry! (wearing a big smile) Nothing to worry about! Nothing at all! Please come back whenever you want, even if you only have too little hair to cut! It will be my honour to serve you!Step 10 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Are all the elements of a play included and in good order ?2. Do the character use suitable language ?3. Are the stage directions clear and useful ?4. Is the plot clear and exciting enough ?
【參考范文】Narrator:(Henry is smiling as he leaves the restaurant. As he is walking down the street, he sees a sign for a place that cuts hair. He decides to get it cut. )H=Henry;B=Barber;R=rude manH:Good afternoon, I'd like to get a cut, if I may. (The barber looks at Henry's hair and continues cutting another man's hair. )Er, I'd really like a haircut. As you can see it's much too long. B:(in a rude manner) Yes, I can see that. Indeed, I can. H:Fine, well I'll have a seat then. (He sits in one of the barber's chairs. The barber turns to look at Henry. )B:It's quite expensive here, you know!Are you sure you can afford it?H:Yes. I think so. (In comes the rude man. )R:Hey you there. I need a haircut quickly. Can you do me straightaway?B:All right, then, get in the chair and I'll see what I can do. R:Thank you. (sits down in one of the barber's chairs)H:Excuse me, but I was here first. Aren't you going to do my hair first?B:This man's in a hurry. H:Well so am I!I insist that you cut my hair first. B:OK, but I'll have to be quick. This gentleman is waiting. H:Thank you. (They both become quiet. After his hair is cut, the barber tells Henry how much he must pay. Henry shows the barber the bank note. )B:Why, Mr . . . (looks shocked)H:Adams. Henry Adams. I'm sorry, I don't have any change. R:You're that Mr Adams! Well,I'm glad I waited or I might never have known it was you. B:Why, Mr Adams, please don't worry!(wearing a big smile) Nothing to worry about!Nothing at all!Please come back any time, even if you only need too little hairs cut!It will be my honour to serve you!
The grammatical structure of this unit is predicative clause. Like object clause and subject clause, predicative clause is one of Nominal Clauses. The leading words of predicative clauses are that, what, how, what, where, as if, because, etc.The design of teaching activities aims to guide students to perceive the structural features of predicative clauses and think about their ideographic functions. Beyond that, students should be guided to use this grammar in the context apporpriately and flexibly.1. Enable the Ss to master the usage of the predicative clauses in this unit.2. Enable the Ss to use the predicative patterns flexibly.3. Train the Ss to apply some skills by doing the relevant exercises.1.Guide students to perceive the structural features of predicative clauses and think about their ideographic functions.2.Strengthen students' ability of using predicative clauses in context, but also cultivate their ability of text analysis and logical reasoning competence.Step1: Underline all the examples in the reading passage, where noun clauses are used as the predicative. Then state their meaning and functions.1) One theory was that bad air caused the disease.2) Another theory was that cholera was caused by an infection from germs in food or water.3) The truth was that the water from the Broad Street had been infected by waste.Sum up the rules of grammar:1. 以上黑體部分在句中作表語。2. 句1、2、3中的that在從句中不作成分,只起連接作用。 Step2: Review the basic components of predicative clauses1.Definition
當(dāng)孩子們由父母陪同時,他們才被允許進(jìn)入這個運(yùn)動場。3.過去分詞(短語)作狀語時的幾種特殊情況(1)過去分詞(短語)在句中作時間、條件、原因、讓步狀語時,相當(dāng)于對應(yīng)的時間、條件、原因及讓步狀語從句。Seen from the top of the mountain (=When it is seen from the top of the mountain), the whole town looks more beautiful.從山頂上看,整個城市看起來更美了。Given ten more minutes (=If we are given ten more minutes), we will finish the work perfectly.如果多給十分鐘,我們會完美地完成這項(xiàng)工作。Greatly touched by his words (=Because she was greatly touched by his words), she was full of tears.由于被他的話深深地感動,她滿眼淚花。Warned of the storm (=Though they were warned of the storm), the farmers were still working on the farm.盡管被警告了風(fēng)暴的到來,但農(nóng)民們?nèi)栽谵r(nóng)場干活。(2)過去分詞(短語)在句中作伴隨、方式等狀語時,可改為句子的并列謂語或改為并列分句。The teacher came into the room, followed by two students (=and was followed by two students).后面跟著兩個學(xué)生,老師走進(jìn)了房間。He spent the whole afternoon, accompanied by his mom(=and was accompanied by his mom).他由母親陪著度過了一整個下午。
Step 5: After learning the text, discuss with your peers about the following questions:1.John Snow believed Idea 2 was right. How did he finally prove it?2. Do you think John Snow would have solved this problem without the map?3. Cholera is a 19th century disease. What disease do you think is similar to cholera today?SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.keys:1. John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.2. No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.3. SARS and Covid-19 because they are both deadly and fatally infectious, have an unknown cause and need serious public health care to solve them urgently.Step 6: Consolidate what you have learned by filling in the blanks:John Snow was a well-known _1___ in London in the _2__ century. He wanted to find the _3_____ of cholera in order to help people ___4_____ it. In 1854 when a cholera __5__ London, he began to gather information. He ___6__ on a map ___7___ all the dead people had lived and he found that many people who had ___8____ (drink) the dirty water from the __9____ died. So he decided that the polluted water ___10____ cholera. He suggested that the ___11__ of all water supplies should be _12______ and new methods of dealing with ____13___ water be found. Finally, “King Cholera” was __14_____.Keys: 1. doctor 2. 19th 3.cause 4.infected with 5.hit 6.marked 7.where 8.drunk 9.pump 10.carried 11.source 12.examined 13.polluted 14.defeatedHomework: Retell the text after class and preview its language points
This happens because the dish soap molecules have a strong negative charge, and the milk molecules have a strong positive charge. Like magnets, these molecules are attracted to each other, and so they appear to move around on the plate, taking the food coloring with them, making it look like the colors are quickly moving to escape from the soap.Listening text:? Judy: Oh, I'm so sorry that you were ill and couldn't come with us on our field trip. How are you feeling now? Better?? Bill: Much better, thanks. But how was it?? Judy: Wonderful! I especially liked an area of the museum called Light Games.it was really cool. They had a hall of mirrors where I could see myself reflected thousands of times!? Bill: A hall of mirrors can be a lot of fun. What else did they have?? Judy: Well, they had an experiment where we looked at a blue screen for a while, and then suddenly we could see tiny bright lights moving around on it. You'll never guess what those bright lights were!? Bill: Come on, tell me!? Judy: They were our own blood cells. For some reason, our eyes play tricks on us when we look at a blue screen, and we can see our own blood cells moving around like little lights! But there was another thing I liked better. I stood in front of a white light, and it cast different shadows of me in every color of the rainbow!? Bill: Oh, I wish I had been there. Tell me more!? Judy: Well, they had another area for sound. They had a giant piano keyboard that you could use your feet to play. But then, instead of playing the sounds of a piano, it played the voices of classical singers! Then they had a giant dish, and when you spoke into it, it reflected the sound back and made it louder. You could use it to speak in a whisper to someone 17 meters away.? Bill: It all sounds so cool. I wish I could have gone with you? Judy: I know, but we can go together this weekend. I'd love to go there again!? Bill: That sounds like a great idea!
The grammar of this unit is designed to review noun clauses. Sentences that use nouns in a sentence are called noun clauses. Nominal clauses can act as subject, object, predicate, appositive and other components in compound sentences. According to the above-mentioned different grammatical functions, nominal clauses are divided into subject clause, object clause, predicate clause and appositive clause. In this unit, we will review the three kinds of nominal clauses. Appositive clauses are not required to be mastered in the optional compulsory stage, so they are not involved.1. Guide the students to judge the compound sentences and determine the composition of the clauses in the sentence.2. Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.3. Inspire the students to systematize the function and usage of noun clause1.Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.2.Inspire the students to systematize the function and usage of noun clauseStep1: The teacher ask studetns to find out more nominal clauses from the reading passage and udnerline the nominal clauses.
The newspaper reported more than 100 people had been killed in the thunderstorm.報紙報道說有一百多人在暴風(fēng)雨中喪生。(2)before、when、by the time、until、after、once等引導(dǎo)的時間狀語從句的謂語是一般過去時,以及by、before后面接過去的時間時,主句動作發(fā)生在從句的動作或過去的時間之前且表示被動時,要用過去完成時的被動語態(tài)。By the time my brother was 10, he had been sent to Italy.我弟弟10歲前就已經(jīng)被送到意大利了。Tons of rice had been produced by the end of last month. 到上月底已生產(chǎn)了好幾噸大米。(3) It was the first/second/last ... time that ...句中that引導(dǎo)的定語從句中,主語與謂語構(gòu)成被動關(guān)系時,要用過去完成時的被動語態(tài)。It was the first time that I had seen the night fact to face in one and a half years. 這是我一年半以來第一次親眼目睹夜晚的景色。(4)在虛擬語氣中,條件句表示與過去事實(shí)相反,且主語與謂語構(gòu)成被動關(guān)系時,要用過去完成時的被動語態(tài)。If I had been instructed by him earlier, I would have finished the task.如果我早一點(diǎn)得到他的指示,我早就完成這項(xiàng)任務(wù)了。If I had hurried, I wouldn't have missed the train.如果我快點(diǎn)的話,我就不會誤了火車。If you had been at the party, you would have met him. 如果你去了晚會,你就會見到他的。
The discourse explores the link between food and culture from a foreign’s perspective and it records some authentic Chinese food and illustrates the cultural meaning, gerography features and historic tradition that the food reflects. It is aimed to lead students to understand and think about the connection between food and culture. While teaching, the teacher should instruct students to find out the writing order and the writer’s experieces and feelings towards Chinese food and culture.1.Guide the students to read the text, sort out the information and dig out the topic.2.Understand the cultural connotation, regional characteristics and historical tradition of Chinese cuisine3.Understand and explore the relationship between food and people's personality4.Guide the students to use the cohesive words in the text5.Lead students to accurately grasp the real meaning of the information and improve the overall understanding ability by understanding the implied meaning behind the text.1. Enable the Ss to understand the structure and the writing style of the passage well.2. Lead the Ss to understand and think further about the connection between food and geography and local character traits.Step1: Prediction before reading. Before you read, look at the title, and the picture. What do you think this article is about?keys:It is about various culture and cuisine about a place or some countries.
You have no excuse for not going.你沒有理由不去。He was punished for not having finished his homework.他因未完成作業(yè)而受到懲罰。2.動詞ing形式復(fù)合結(jié)構(gòu)由物主代詞或人稱代詞賓格、名詞所有格或普通格加動詞ing,即“sb./sb.'s+doing”構(gòu)成。動詞ing形式的復(fù)合結(jié)構(gòu)實(shí)際上是給動詞ing形式加了一個邏輯主語。動詞ing形式的復(fù)合結(jié)構(gòu)有四種形式:①形容詞性物主代詞+動詞ing②名詞所有格+動詞ing③代詞賓格+動詞ing④名詞+動詞ingHer coming to help encouraged all of us.她來幫忙鼓舞了我們所有人。The baby was made awake by the door suddenly shutting.這個嬰兒被突然的關(guān)門聲吵醒了。Can you imagine him/Jack cooking at home?你能想象他/杰克在家做飯的樣子嗎?無生命名詞無論是作主語還是作賓語都不能用第②種形式。Tom's winning first prize last year impressed me a lot.湯姆去年得了一等獎使我印象深刻。Do you mind my/me/Jack's/Jack leaving now?你介意我/杰克現(xiàn)在離開嗎?Excuse me for my not coming on time.很抱歉我沒能按時來。His father's being ill made him worried.他父親病了,他很擔(dān)心。We are looking forward to the singer's/the singer to give us a concert.我們盼望著這位歌手來給我們舉辦一場演唱會。
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.
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。
Everybody wants to get wealth.In today’s material world,making money or becoming wealthy symbolizes a person’s success and capability. Many people just make every effort, pay any price to attain greater wealth. With money,they can buy nice, large apartments in nice neighborhood. With money they can own luxurious cars. Wealth seems to bring all happiness in life.But is wealth the only road to happiness? Not really. There are many things in the world, which are beyond the means of money, such as friendship, love, health and knowledge. People are so preoccupied with struggling for money that they have no time or would not take the time to form or maintain friendship. What happiness can they feel living as lonely miserable creatures without love or friends in the world even if they accumulate tremendous wealth?In my opinion, people can’t do anything without money, but money is not everything. What money will bring you depends on your personal belief and goal in life. If you are kind enough to help others, especially the poor, money is a good thing to you. With it, you can do much more for the benefit of people and your country, and it will add to your own happiness. If you want money just for your own needs, you’ll never be satisfied or happy. In a word,you should have money spent for more people. Only then can money be the source of your happiness.Step 8 Homework4 students in a group, one acts Roderick, one Oliver, one servant and the fourth one acts Henry Adams, then listen to the tape, pay more attention to the difference between American English and British English in pronunciation, stress, tone.
Step 7: complete the discourse according to the grammar rules.Cholera used to be one of the most 1.__________ (fear) diseases in the world. In the early 19th century, _2_________ an outbreak of cholera hit Europe, millions of people died. But neither its cause, 3__________ its cure was understood. A British doctor, John Snow, wanted to solve the problem and he knew that cholera would not be controlled _4_________ its cause was found. In general, there were two contradictory theories 5 __________ explained how cholera spread. The first suggested that bad air caused the disease. The second was that cholera was caused by an _6_________(infect) from germs in food or water. John Snow thought that the second theory was correct but he needed proof. So when another outbreak of cholera hit London in 1854, he began to investigate. Later, with all the evidence he _7_________ (gather), John Snow was able to announce that the pump water carried cholera germs. Therefore, he had the handle of the pump _8_________ (remove) so that it couldn't be used. Through his intervention,the disease was stopped in its tracks. What is more, John Snow found that some companies sold water from the River Thames that __9__________________ (pollute) by raw waste. The people who drank this water were much more likely _10_________ (get) cholera than those who drank pure or boiled water. Through John Snow's efforts, the _11_________ (threaten) of cholera around the world saw a substantial increase. Keys: 1.feared 2.when 3. nor 4.unless 5.that/which 6.infection 7.had gathered 8.removed 9.was polluted 10.to get 11. threat
1、交流與發(fā)現(xiàn)為了了解本校學(xué)生暑假期間參加體育活動的情況,學(xué)校準(zhǔn)備抽取一部分學(xué)生進(jìn)行調(diào)查,你認(rèn)為按下面的調(diào)查方法取得的結(jié)果能反映全校學(xué)生的一般情況嗎?如果不能反映,應(yīng)當(dāng)如何改進(jìn)調(diào)查方法?方法1:調(diào)查學(xué)校田徑隊(duì)的30名同學(xué);方法2:調(diào)查每個班的男同學(xué);方法3:從每班抽取1名同學(xué)進(jìn)行調(diào)查;方法4:選取每個班級中的一半學(xué)生進(jìn)行調(diào)查.通過前面的活動,學(xué)生親身經(jīng)歷了一次數(shù)據(jù)的調(diào)查過程,并通過對所得數(shù)據(jù)的計(jì)算和分析,了解了自己在家干家務(wù)活的時間所處的位置和水平,在調(diào)查過程中體會到調(diào)查方便有效的重要性.接下來,就能很好地解決交流與發(fā)現(xiàn)中的問題.師生共同討論完成交流與發(fā)現(xiàn).
1、問題1的設(shè)計(jì)基于學(xué)生已有的一元一次方程的知識,學(xué)生獨(dú)立思考問題,同學(xué)會考慮到題中涉及到等量關(guān)系,從中抽象出一元一次方程模型;同學(xué)可能想不到用方程的方法解決,可以由組長帶領(lǐng)進(jìn)行討論探究.2、問題2的設(shè)計(jì)為了引出二元一次方程,但由于同學(xué)的知識有限,可能有個別同學(xué)會設(shè)兩個未知數(shù),列出二元一次方程;如果沒有生列二元一次方程,教師可引導(dǎo)學(xué)生分析題目中有兩個未知量,我們可設(shè)兩個未知數(shù)列方程,再次從中抽象出方程模型.根據(jù)方程特點(diǎn)讓生給方程起名,提高學(xué)生學(xué)習(xí)興趣.3、定義的歸納,先請同學(xué)們觀察所列的方程,找出它們的共同點(diǎn),并用自己的語言描述,組內(nèi)交流看法;如果學(xué)生概括的不完善,請其他同學(xué)補(bǔ)充. 交流完善給出定義,教師規(guī)范定義.
2.學(xué)會聲母“b”和單韻母“a”拼讀音節(jié)的方法。 3.學(xué)會拼讀“b p m f”與“u、o”組成的音節(jié)?! 〗虒W(xué)難點(diǎn) 掌握拼讀聲母和韻母組成的音節(jié)?! 〗虒W(xué)過程 一、談話導(dǎo)入 我們已經(jīng)認(rèn)識了韻母家族的6個朋友(出示a o e i u ü)一起讀讀,你們讀得真準(zhǔn),能不能按字母順序擺一擺,再按順序讀一讀。你們記得真清楚。這節(jié)課我們一起到拼音王國里再認(rèn)識四個聲母家族的朋友,你們愿意嗎? 二、學(xué)習(xí)“b p m f ”的音形 ?。ㄒ唬W(xué)習(xí)“b”的音形 1.出示“b”的圖 ?。?)引導(dǎo)學(xué)生提問:圖上的小朋友在干什么? ?。?)問:這個字母念什么?學(xué)生試讀“b”?! 。?)講:聽廣播的“播”讀得輕短些,發(fā)音時,把兩片嘴閉合,把氣 憋住,然后突然放開,讓氣流沖出雙唇就是“b”的音。 ?。?)教師范讀?! 。?)學(xué)生學(xué)讀,體會發(fā)音方法。 ?。?)開火車讀。 2.學(xué)習(xí)“b”的形 ?。?)引導(dǎo)學(xué)生提問:怎樣記住“b”的形?或“b”與圖中的哪一部分很像? ?。?)你們能編一個記憶“b”的小兒歌嗎? 拉開天線聽廣播“b b b”?! ∮蚁掳雸A“b b b”?! ?字“b”?! ?.指導(dǎo)書寫b(1)講:我們先認(rèn)識一個字母基本筆畫:“丨”上豎。 (2)請同學(xué)們觀察書中字母“b”先寫哪筆,再寫哪筆,幾筆寫成?占什么格?同桌同學(xué)互相說說。(3)學(xué)生說筆順、位置,教師范寫,強(qiáng)調(diào)“b”的第一筆在上格的三分之一處起筆到第三條線停筆。 (4)學(xué)生書空筆順?! 。?)學(xué)生在拼音本上抄字頭。教師行間巡視,進(jìn)行個別輔導(dǎo)。糾正學(xué)生的寫姿和執(zhí)筆方法。對姿勢正確的學(xué)生及時表揚(yáng)鼓勵。
2、學(xué)會正確認(rèn)讀i、u、ü的帶調(diào)韻母。知道ü上標(biāo)聲調(diào)時,上面的小圓點(diǎn)不寫。3、會在四線格里抄寫i、u、ü三個單韻母。課時安排:2課時第一課時 教學(xué)目標(biāo):教學(xué)單韻母i、u并抄寫。 教學(xué)過程: 一、 復(fù)習(xí)檢查?! ?、猜謎語?! 。?)白鵝倒影是什么韻母? ?。?)圓臉小姑娘,小辮右邊扎。這是什么韻母? ?。?)像個圓圈是什么韻母? 2、抽讀字母卡片?! 《?、 教學(xué)單韻母i。 1、看圖說話引出i?! D上畫著什么?圖上畫著一件衣服。i的發(fā)音與“衣”的音相同?! ?、教學(xué)i的發(fā)音,認(rèn)清字形?! 。?)發(fā)音要領(lǐng):發(fā)音時嘴比發(fā)e時開得更小,只留一條小縫,舌前部升高,接近上腭,舌尖抵住下齒背,讓氣從舌尖和上腭中間自然流出。 ?。?)教師范讀、領(lǐng)讀。 ?。?)記憶字形?! 像什么?順口溜:“像支蠟燭i、i、i。” 3、書寫指導(dǎo):先寫豎,再寫點(diǎn),兩筆寫成?! ∪?、 教學(xué)單韻母u。 1、看圖說話引出u。 圖上畫著什么?“樹上有一只烏鴉。”烏鴉的“烏”就是u?! ?、教學(xué)u的發(fā)音,認(rèn)清字形。 ?。?)發(fā)音要領(lǐng):發(fā)音時把嘴唇收攏,嘴唇比發(fā)o時更圓更小,舌尖后縮,舌根抬高,讓氣從小洞中出來?! 。?)教師范讀,領(lǐng)讀?! 。?)記憶字形?! 】捎庙樋诹铮骸跋裰徊璞璾、u、u?!薄 ?、書寫指導(dǎo):u一筆寫成?! ∷?、 鞏固復(fù)習(xí)。
活動內(nèi)容:① 已知,如圖,在三角形ABC中,AD平分外角∠EAC,∠B=∠C.求證:AD∥BC分析:要證明AD∥BC,只需證明“同位角相等”,即需證明∠DAE=∠B.證明:∵∠EAC=∠B+∠C(三角形的一個外角等于和它不相鄰的兩個內(nèi)角的和)∠B=∠C(已知)∴∠B=∠EAC(等式的性質(zhì))∵AD平分∠EAC(已知)∴∠DAE=∠EAC(角平分線的定義)∴∠DAE=∠B(等量代換)∴AD∥BC(同位角相等,兩直線平行)想一想,還有沒有其他的證明方法呢?這個題還可以用“內(nèi)錯角相等,兩直線平行”來證.
1、方程的定義1)像這種用等號“=”來表示相等關(guān)系的式子,叫等式。(老師給出定義。)2)請大家觀察左邊的這些式子,看看它們有什么共同的特征?(老師提出問題。)3)列方程時,要先設(shè)字母表示未知數(shù),然后根據(jù)問題中的相等關(guān)系,寫出含有未知數(shù)的等式叫做方程。(學(xué)生思考后,老師給出新學(xué)內(nèi)容方程的定義。)4)判斷方程的兩個關(guān)鍵要素: ①有未知數(shù) ②是等式(老師提問,并給出。)