八年级英语下册 Unit 2 Water教案 （新版）牛津上海版(1).doc

u2 water the first periodteaching aims：introduce the topic water. ask students to work in pairs for a few minutes, and to write down anything they know about water. ask 3 students to tell their answers and write them down on the black board. then discuss their ideas briefly and do the exercises.teaching important points :try to know something about waterteaching procedures: 1: a free talkwhat do you know about water*people can live without food for more than a month, but they cant live without water for more than week. losing more than 20% of the normal water content of our bodies will result in a painful death.*about 65-70% of our bodies are water, so it is important for us to drink a lot of water. each day, a normal person will drink about 2.4 liters of water or other drinks. in america, the average person will use 260 liters of water a day and on average, each person will drink 60, 600 liters of water in his/her life.*some people believe that our emotions and mental stability are affected when there is a full moon because the gravitational pull of the moon affects the water in our bodies in the same way as it affects the ocean tides. legends say that werewolves appear when there is a full moon.*you need more water during and after exercise because you lose water by sweating and you need to replace the water that is lost.*water freezes at 0 (32). when it freezes, it changes into ice. water boils at 100(212) when it changes its form into a gas, becoming steam. 2: look and think* choose the write answer1 you could live without water for a few _. a days b weeks c hours2 your body needs about _ liters of water daily. a two b four c eight3 when you exercise, the amount of water you need _. a increases b decreases c remains the same4 when you freeze water, it becomes a _. a liquid b solid c gas5 about _ of the earth is covered by water. a one third b one half c two thirds6 the scientific symbol for water is _. a h2o b ho2 c h2o2* use the picture to put these sentences in the correct order.( ) it flows to the sea.( ) it runs into streams and rivers.( ) it rises from the sea to the sky.( ) water falls from the clouds as rain.( ) it falls as rain again.homework:preview the text: water talk the second periodteaching aims:1 try to understand the whole lesson and read it fluently. the tone and pronunciation should be basically right. 2 learn the new words and phrases.teaching aids: multimedia equipment teaching important points : how to understand the test completely .teaching difficult points : teaching procedures: 1: a free talk (ask two ss to talk about some measures we use to save water and say the following.) t: very good . thank you for your performance.we have learnt that water is very important and we dont have enough water in the world. if we dont have water in our daily life, the situation will be terrible and we all will die. some people in other places are suffering from lack of water, such as african people. we should treat every drop of water seriously and should no waster even a drop of water.show the text on the screen then give brief introduction to the students and then let ss read the new text after the recording . 2: learn some new words.1 brush n. 刷子，毛刷 v. 刷，擦，拂拭 we brush our teeth with a toothbrush everyday.2 pour v. 灌注，倾泻，涌入，流，倾盆大雨pour oil on the fire 火上加油tears poured from her eyes.people poured into he hall.please pour me a cup of tea.at 5 o clock workers poured out of the factories.it was pouring. 3 sink n. 水槽 i left the soap by the side of the sink. v. 使下沉 the ship is sinking.4 vanish v. 消失 forests are vanishing from our land.5 drain n. 排水管 your kitchen drain has become blocked by tea leaves. v. 排去 the water drained away slowly.6 freeze v. （使）结冰，凝固 the terrible news froze my blood. freezing adj. 极冷的 frozen adj. 冻结的 frozen food7 impatient adj. 不耐烦的，没耐心的 opp. patient 有耐心的im getting impatient because ive waited for an hour. patience n. 耐心，容忍 i have no patience with him again.8 obey v. 服从，顺从，听话 they refused to obey (the order).9 faint adj. 微弱的 did you hear the faint moan just now?10 float adj. 漂浮，飘浮 wood floats on water.11 comfortably adv. 舒适的，舒服的 comfortable adj. 安乐的，舒适的 comfort n. 慰藉，安乐 i feel very comfortable in this chair. the lovely baby was a comfort to her.12 view n. 景色，风景 the house has a view over the sea. n. 看法，观点 what is your view on school punishments?13 speed v. 加速 speed upn. 速度 at a speed of 80 miles an hour14 nod v. 点头 she nodded to show that she agreed with me. n. 点头 he greeted me with a nod.15 relax v. 松弛，放松，休息 after a day of hard work, i relaxed at home.16 puzzled adj. 困惑的，疑惑的 puzzle v. （使）迷惑，（使）为难，迷惑不解n. 难题，迷 a crossword puzzle i was puzzled how to do it. their strange relationship puzzles me.17 treatment n. 治疗，处理 his treatment of the animal was cruel. hard treatment: 虐待 be under treatment：在治疗中 treat v. 对待，处理18 thorough adj. 完全的，彻底的 wed better have a thorough cleaning to welcome the chinese new year. thoroughly adv. 完全地，彻底地 we have cleaned the house thoroughly to welcome the chinese new year.19 chemical n. 化学制品 they added a few chemicals to clean up the water. chemical adj. 化学的 chemical change chemistry n. 化学 she is out chemistry teacher.20 sewage n. 污水 we cant let out sewage because it will pollute the water.21 plant n. 工厂，仪器 when the plant closed down, many workers lost their jobs.n. 植物v. 种植22 pump v. 抽水 can you help to pump the water from the well? the heart pumps blood.n. 抽水机，打气筒23 precious adj. 珍贵的，宝贵的 nothing is more precious than friendship. the beautiful vase is very precious.24 weird adj. 怪异的，奇怪的，不可思议的 tom had some weird ideas. 3: practice play the tape for students to listen and repeat, then answer some questions. 4: read and thinkcomplete the following blanks.1 peter why was the voice impatient? judy _ daisy was _ _.2 peter why did daisy nod her head? judy _ she knew _ _ _ _ was.3 peter why did the water go to a treatment works? judy _ it _ _ _ _ journey.4 peter why did the water say, ill be back in the sea again.? judy _ it _ _ the sea _ _ _ place.5 peter why did the water say it was like liquid gold?judy _ it believed that _ _ _.6 peter why did benny think his sister was weird?judy _ she said, _ _ _ _ _ _. 4: explain the language points :1 look around: 向四周看 i looked around and found there was no one in the street at all.2 it is /was time to do sth. 是该的时候了,到时候了 it is time to have lunch. 该吃饭了。 it was time for him to stop his revenge. it is time to have a relax if there is no work to do.3 finish doing sth. finish with sth. 完成某事 could i borrow the book when you have finished reading it? i have finished with all my homework. the work has not been finished yet. another 3 days are needed to finish it. after finishing playing football, you can have a bath.4 it is (not) + adj. + for sb. to do sth. 某人做某事（不）容易 it is exciting for us to go to the movies. it is not easy for him to win the first prize. it is impossible for people to live on the sun.5 get cleaned up = be cleaned up homework:the third periodteaching aims: 1 review the new words and expressions and the grammatical points in the chapter2 do some exercisesteaching important points : master how to talk about amounts.teaching difficult points :1 the different usage of a few, a little, few and little 2 how to understand the listening and the sequences of events.teaching procedures: 1:revision 1 show the new words of chapter 6 on. first ask a student to read aloud, correct the wrong pronunciation, and then ask the whole class to read together.2 read the text after the tape to understand it better 2:ask student to do the vocabulary exercises c1, c2 and c3. 3: listeningput the picture into right order.1 one day, suzys mother gave her one-yuan coin. it was rather dirty, so suzy put it in the sink and washed it. when the coin was nice and clean, it suddenly started talking to suzy.2 this listening is aimed at training students understanding of the order of the events. ask the students to see how the drop travels in water talk. 3 play the recording once, while students listen but do not write anything. tell them to listen for the sense and the main points. then replay the recording and students must complete the exercise. replay it a third time，explaining any problems. 4:gramma: learn how to talk about amounts1 he took a few biscuits. he took a little butter.*compare the two sentences and ask the students to discuss in pairs to tell the differences.*explain that “a little” and “a few” all mean 数量很少的, “a few” 用于修饰可数名词, “a little” 修饰不可数名词，它们都表示肯定的含义*a few = some, several a little = someeg. i want a little coffee. give me a few apples.2 he took few biscuits.he took little butter.*compare the two sentences and ask the students to discuss in pairs to tell the differences.*explain that “few” and “little” all mean 数量少到几乎没有, “few” 修饰可数名词, “little” 修饰不可数名词。都含有否定涵义。*few = not many little = not mucheg. little of his time is spent on books. 他很少花时间在书本上。 there are few eggs in the fridge, are they? 冰箱里几乎没有鸡蛋，是吗？3 “few”, “a few”, “little” and “a little” 既可做形容词又可做代词。eg. - do you want any coffee?- a little , please. quite a few = many eg. i have collected quite a few stamps about the olympics. (=many stamps)4 “a little” and “little” can be used as adv.eg. he talked little about his father. 他很少谈论他的父亲。it rained a little during the night. 夜里下了点雨。time is very limited. could you possibly drive _a little_ faster?there are about 50 guests coming. we need _a few_more chairs.homework:the fourth periodteaching aims: 1 review new words and expressions in the chapter2 further train students ability of talking about amounts3 do some exercisesteaching important points :master the usage of a lot of, much, many, no, noneteaching difficult points :1 the different usage of a lot of, much, many, no, noneteaching procedures: 1:revision1spell the new words and expressions orally2read the text after the tape3comments on homework 2: further train students ability of talking about amounts5 there is much (a lot of) bread on the plate.he has many (a lot of) american stamps.* compare the two sentences* explain that “a lot of” can modify both c noun and u noun. “many” can only modify u noun and “much” can only modify c noun.* point out that “a lot of” only can be used in definite sentences (肯定句). in negative or interrogative sentences (在否定句和疑问句中)， we should change “a lot of” into “much” or “many”.eg. we have a lot of relatives. do you have many relatives? there are a lot of paper on the desk. there are not much paper on the dask.6 “a lot” can be used as pronoun and adverb.eg. - mum, where are my socks?- i saw a lot in the drawer.it rains a lot in spring in shanghai. 上海的春天雨水很多。7 there is no clue to be found.there is none to be found. 没有发现任何线索。*compare the two sentences.*explain that “no” = not any. it can modify u or c noun. it can only be used as adj. while “none” is the pronoun form (代词形式) of “no”.eg. time and tide wait for no man. 时间不等人。none of them can speak chinese. 他们中没有一个人能说中文。jacks wife likes none of his friends.none of the blame is yours. 一点也不怪你。it is no bad thing. 这不是一件坏事。edison is no genius. 爱迪生不是天才。8 we use “how many and how much” to ask the amounts. they mean “有多少”. “how many” is to modify c noun while “how much” is to modify u.eg. how many people are there in your family?how many supermarkets are there in shanghai?how much oxygen does a person need everyday?how much (money) do you want to finish your project?*when we answer the question in brief, we can use “many, much, a few, a little, a lot and none” as pronoun to refer to the noun mentioned in the question.- how much paint do you need? 你需要多少油漆？- i dont need much. 我不需要很多。- how many mobile phones do you have? 你有多少部手机？- i have none. 我一部也没有。9 do exercise a, bhomework: the fourth periodteaching aims: 1 further learn how to talk about amounts2 条件状语从句teaching important points :master the usage of too much, too little, too few, too many and enoughteaching difficult points :1 the different usage of too much, too little, too few, too many and enough2 if 从句teaching procedures: 1:revisionchoose the right work.1 there is _ (a little, a few) juice in the bottle.2 there was _ (little, few) rain in shanghai last month.3 there is _ (not much, not many) water in the pool.4 oh, there is _ (a lot of, a lot) rubbish on the floor.5 she is very busy. she has _ (no, a little) time to watch tv.6 his pockets are empty. there is _ (no, none) money left.7 i need _ (a lot of, many) cloth, for im going to make _ (many, much) clothes.8 there are _ (few, little) people in the park as its cold today. 2: talking about amounts1 dont give the children too much stress when they are taking an exam.*ask two students to explain the chinese meaning,*explain that “too” used before “many, much, few, little” means 太多/ 太少.eg. there are too many cars in the city.there is too much paper on the desk.there are too few students in the playground. we cant even have a football game.dont read here. there is too little light here. 不要在这里读书，这里光线不足。2 “enough” 表示足够的, 可以加可数名词或不可数名词。eg. we have enough instant noodles in the cupboard.we dont have enough butter. peter, go and get some.3 finish exercise c4 条件状语从句 条件状语从句常由连词if引导。条件状语从句不能用will表示将来，要用动词一般现在时来替代，即主语用将来时代替，从句用一般现在时表示将来的意思。 eg. if you dont work hard, you wont pass the exam. 如果你学习不用功，你就不会通过考试。 if you arent careful, you cant get a full mark. 如果你不仔细，你就得不了满分。 注意：若if 从句中有not ，一般可以用unless （除非）来代替。unless you work hard, you wont pass the exam.除非你用功学习，否则你就通不过考试。homework:the fifth periodteaching aims: 1 learn to give reasons and describe how to do things.2 learn to use graphs and charts3 learn to make flow chartsteaching important points : we need water for it is very important because if we do not have water,willteaching difficult points :1 how to gain others support2 learn to use the graphs and charts and to make flow chartsteaching procedures: 1:speak up1 divide the whole students into four groups. group a stand for the ordinary people. group b stands for the restaurant owners. group c stands for the hospital managers and group d stands for the factory owners. the teacher is in charge of the water.2 ask each