上海版牛津初中英语课件Chapter 3.ppt

chapter 3,课时安排： * listening and reading 4 periods *speaking and language 2 periods * writing 2 periods *using english 1 period *more practice 1 period,chapter 3 reading a dangerous servant,oxford english 8b chapter 3,what do you know about ?,electricity is a kind of energy that we cannot see. however, we can change electricity into energy that we can see, hear or feel. we can also change it into energy that can move things.,heat energy,light energy,movement energy,sound energy,sound energy,movement and sound energy,heat energy,light and sound energy,look and think,what did the girl buy? who is looking foolish? who or what is the servant in the title? why is the servant in the title dangerous?,batteries and sweets.,benny.,electricity.,if not used carefully, electricity can hurt us.,a dangerous servant,read the passage.,synopsis,daisy is going to the shop, and benny tries to trick her by asking her to buy a packet of electricity for him. daisy agrees, and benny thinks she is foolish.,benny explains that electricity comes through wires and dad adds that electricity is a dangerous servant.,mum and dad explain that we get electricity from the power station through wires and cables.,daisy returns with some batteries, the packets of electricity benny asked for. benny is surprised and now it is benny who looks foolish.,find the meanings,at last a after a long time b after a busy time c after a short time,2. an explanation a words that make something clear b words that people speak loudly c words that make people puzzled,find the meanings,3. invisible a that cannot be heard b that cannot be seen c that cannot be felt,4. forms a parts b ways c kinds,5. connected a carried b changed c joined,find words from the box for the meanings in italics in the sentences.,switch off the lights. save an invisible form of energy. you will get a bill every month. electricity is like water, party. benny is always running around. he is full of the power to do things. you cannot see the cables because they are put under the ground.,monthly electricity buried energy in a way,find the facts.,im going to the shop. can you get me a packet of electricity, please? she thinks you can buy it in packets. you get a bill for it monthly. electricity is a good servant, but a dangerous one. these are connected to thick wires that are buried under the street. 7. theyre connected to a power station. 8. there was a grin on his face. 9. theyre packets that contain electricity.,daisy,benny,electricity,electricity,servant,thin wires,cables,bennys,batteries,homework: complete the exercises on page 33. read and think.,electricity,students web pages,chapter 3 listening,understanding the main points of the dialogue.,lights,kettle,vacuum cleaner,on off,on off,on off,understanding the main points of the dialogue.,air conditioner,washing machine,rice cooker,on off,on off,on off,understanding the main points of the dialogue.,fridge,television,iron,on off,on off,on off,chapter 3,language& speaking,we use can and cannot (cant) to say we are able or not able to do things.,i can count. 我会数数。,you cannot spell. 你不会拼写。,can they dance? 他们会跳舞吗? yes, he can. / no, she cant.,read what hi and lo say about themselves. then say if the sentences below are t or f.,hi can play football. lo cannot paint pictures. hi can speak more language than lo. hi and lo can both dance. lo can drive a car, but he cannot play chess. hi can swim, but he cannot play the guitar. lo can fly and type.,t,t,f,t,f,t,f,a2 look at the pictures. ask questions and give answers about them. use words from the box.,can kitty spell? yes, she can.,a2 look at the pictures. ask questions and give answers about them. use words from the box.,kitty,can,add ?,no, she cant.,？,a2 look at the pictures. ask questions and give answers about them. use words from the box.,derek,can,subtract ?,yes, he can.,a2 look at the pictures. ask questions and give answers about them. use words from the box.,kitty,can,multiply?,no, she cant.,？,a2 look at the pictures. ask questions and give answers about them. use words from the box.,derek,can,divide?,no, he cant.,？,telling people what to do or what not to do.,you must not cycle.,you must be cafeful.,telling people what to do or what not to do.,you must not smoke.,you must not turn right.,telling people what to do or what not to do.,you must turn left.,you must not make a noise.,telling people what to do or what not to do.,admission ￥10,you must pay ten yuan.,一、表示推测 ( may, can / could, must, should, ought to ),may “可能” there may be little water left in the bottle. he thought it might be wise to try his luck there. she may not be waiting for you now.,注意: 可以用might代替may，以表示说话语气更加不肯定; may 表示推测时,不能用于疑问句中。如果在疑问句中出现； may 则表示请求许可，意为 “可以”。 may i use your cell phone ?,注意: 1) 可以用could代替can, 以表示语气婉转;,2) 表示推断，can不能用于肯定陈述句，但could可以用于肯定陈述句， 相当于may/might； this story could be true, but i hardly think it is.,may / might,2. can “可能会”,that cant be true. what on earth can this mean ?,3) can 可以用于肯定陈述句, 表示一时的情况, 意为“有时候会”; our house is on the top of the hill, and in winter the winds can be pretty cold. 4) may not / might not意为 “可能不”, 而can not / could not意为 “不可能” 、 “肯定不”, 其语气要比may not / might not强得多。,3. must “肯定”、 “准是” judging by the smell, the food must be good, isnt it?,you must be joking, arent you?,注意: 1) must表示推测不用于否定句，因为must not / must never。 只能表示禁止，意为 “不准”、“不可以”； may i watch tv after supper? no, you mustnt. (may not / cant 也可 ),2) must表示推测不用于疑问句，因为must在疑问句中只能表示 “必须” 或表示反感 “(干吗)偏要” “硬要” ; must i finish it by the end of this week? why must you ask me so many questions when im busy cooking? 3) must表示推测不用于将来.应该用别的句型表示推测 “肯定会” 、 “准会”。 youre sure to succeed. / it is certain that you will succeed. / im sure that youll succeed.,四. 表示允许或征询对方许可。,may / might, can / could (“不准许”may not / cant / mustnt),you may / can stay here for the night. may / might / can / could i have a talk with you ? yes, you may / can. ( no, you may not / cant / mustnt.),(但不说: yes, you might / could.),五. 表示能力 can (过去式could ) / 比较 be able to 泛指能力(具有知识、技巧、本领而能读书、游泳、 说英语、踢足球等) 。 1. i could / was able to swim well when i was only ten.,2. 如果指过去具体某时或某个场合能(设法)做到某事 (succeeded in doing sth. / managed to do sth.)，在否定句中两者都可用，在肯定陈述句和疑问句中，只能用be able to。 we had a holiday yesterday, but couldnt / werent able to go to the seaside.,speak up.,students produce a short dialogues and act it out. you can make similar ones as exercise b on page 39.,work in pairs:,homework,do the other exercises in this part.,chapter 3 writing knowledge objective: the revision of auxiliary verb “must” ability objective: retell the office rules ， school rules and also fire rules in the previous book.,points,1.stop sb. from doing sth. 2.answer the telephone 3.lean out of 4.be polite to sb. 5.and so on,chapter 3 using english,finding books in a library.,benny: how do you divide the books in your library? brenda: we first divide them into fiction books and non- fiction books. benny: whats the difference? brenda: fiction books contain stories about people and things that not real. benny: and non- fiction books? brenda: theyre about real people and things. encyclopedias, history books and science books are non- fiction books. benny: how do you arrange the books on your shelves?,finding books in a library.,brenda: we arrange fiction books in alphabetical order by the authors names. we arrange non- fiction books by subject and we give each subject a number. benny: how can i find a book in your library? brenda: you must know one of the following: the topic of the books, the title of the book or the authors name. then you can find details of the book in the catalogue. benny: what are catalogues?,finding books in a library.,brenda: in our library, theyre lists of topics, titles and authors arranged in alphabetical order. our catalogue are on cards, but in many libraries nowadays the catalogues are on computer. benny: thank you, brenda.,1. how do you divide the books in your library? we first divide them into fiction books and non- fiction books. fiction books contain stories about people and things that not real. 4. theyre about real people and things. encycl