九年级英语 Unit 4 Inventions and Inventors学案 北师大版

1、unit 4 inventions and inventors【本讲教育信息】一. 教学内容：book 15 unit 4 (i)学会用动词的被动语态描述物体的使用方法，构成成份和功能作用。二. 教学重点： 1. 动词一般现在时被动语态。 2. 动词一般过去时被动语态。 3. 动词一般将来时被动语态。 4. 情态动词的被动语态 5. 重点词汇三. 具体内容：（一）被动语态是动词的一种特殊形式，表示句子中的主语是动词的承受者，也就是动作的对象。一般说来，只有需要动作对象的及物动词才有被动语态。被动语态的用法：1）当我们不知道谁是动作的执行者时，或者没有必要指出谁是动作的执行者时，e.g. pri

2、nting was introduced into europe from china.a new bridge will be built here next year.2）当我们关心动作的承受者但也关心动作的执行者时，用by加动作的执行者。e.g. the town was destroyed by an earthquake.英语动词的被动语态由助动词be+及物动词的过去分词构成。时态举例：1. 一般现在时：football is played all over the world.english is spoken in britain, the us and some other c

3、ountries.roger, you are wanted on the phone.2. 一般过去时：the great hall of the people was built in 1959.his leg was broken in an accident.the international was written in 1871 by eugene potter, the french worker-poet.3. 一般将来时:more schools will be built in my hometown.he will be taken to hospital tomorro

4、w. 4. 情态动词的被动语态the meat should be kept in a fridge.rice can be boiled or steamed.this material must be handled carefully.text:the first paper was (make) in china in 105 ad by a man called cai lun. the oldest pieces of paper still existed were made in about 150 ad. for over 500 years the art of makin

5、g paper was (limit) to china. in 610, papermaking was (introduce) into japan, and then into central asia in about the year 750. paper made its first appearance in egypt in about 800 but it was not (produce) there until the year 900. kites (know) in china about 3,000 years ago. they were used in batt

6、les to transport supplies to soldiers who were in danger.wheelbarrows (invent) in the han dynasty. they were used by builders to carry heavy supplies. in a battle, wheelbarrows were used to carry injured or dead soldiers.gunpowder (discover) by the chinese who used it for making fireworks hundreds o

7、f years ago. it was probably introduced into europe from the middle east.umbrellas (invent) by the chinese. they were made from oiled paper and bamboo. red and yellow umbrellas (use) by higher class, and blue umbrellas were used by the common people.soccer (develop) in england in the 12th century. b

8、ut hundreds of years before this-around 200 bc- a similar game (play) at the beginning of the han dynasty in china.magic squares are a very old type of number puzzle. they (invent) in china before the end of the 1st century ad. in a magic square, no matter from which direction you add up the numbers

9、, the result is the same. ex. fill in the blanks with is, are.camera often used when people travel.milk had as main food for babies.some advice given by the professor.bread taken three times a day in this family.the sheep killed by a gang of wolves.the ill teeth taken out by the dentist.the watches

10、made in swiss.many people hurt in the accident.police called at once by the 2 drivers.（二）重点词汇：1. switch on switch the light on, please.the oven is programmed for the correct time and then switched on.2. absorbwater is absorbed into the soil.he was so absorbed by the book that he failed to hear the d

11、oorbell.3. copythis picture is a copy from xu beihong.copy the following words into your exercise books.4. make ones appearanceshe made her first stage appearance at the age of 16.he has made a number of appearances on television.5. turn intothe microwaves are absorbed by the food and they are turne

12、d into heat.6. no matter常与what, who, when, which, whose, how 连用no matter when he comes again, he will be welcomed.no matter who knocks, dont open the door.no matter what problem you have, turn to me.no matter whose bag it is, it will be kept here until the owner returns.7. be made of/fromthis bottle

13、 is made of glass.the bag is made of cloth.butter is from milk.paper is made from trees.8. be used for/bya saw is used for cutting wood.a microwave oven is used for heating food.chalk is used by teachers.this notebook was used by my mother.课堂练习用be used for/by or be make of/from 补全句子：1. spoons and fo

14、rks eating in the west.2. greenhouse keeping the vegetables warm.3. bamboo chinese writing characters.4. youd better use bags cloth instead of bags plastic.5. the beautiful lights crystal glass.6. soap animals oil.句型转换：1. cai lun invented paper in 105 ad . （变成被动句）2. people grow rice in south china.

15、（变成被动句）3. china will hold the 29th olympic games .（变成被动句）4. people must lock their bikes . （变成被动句）5. gunpowder was discovered by the chinese. （变一般疑问句）6. very few people will be killed in car accident in the future. （变否定句）7. tea-drinking was first recorded in china about 2737 bc. （对画线部分提问）【本讲教育信息】一.

16、教学内容：book 15 unit 4 (ii)复习被动语态，学会使用被动语态描述事物的使用，构成和功能；学会用情态动词表达怀疑，确定和可能。二. 本周教学重点：1. 复习被动语态2. 情态动词表达怀疑、确定和可能。3. 重点词汇三. 具体内容：（一）被动语态：1. 一般现在时被动语态基本结构：主语am/is/are过去分词the food is placed in the oven.they are turned into heat.2. 一般过去时被动语态基本结构：主语was/were过去分词magic squares were invented in china.papermaking

17、was introduced into japan in 610.3. 情态动词被动语态基本结构：主语can/should/mustbe过去分词school uniform must be worn at all times.4. 一般将来时被动语态基本结构：主语willbe过去分词it cant be a radio because its too big to be a radio.the report will _ （finish）in two days time.milk should _ （keep）in the fridge.white clothes and colored cl

18、othes should not _（wash）together.school uniforms neednt _（wear）at all times. （二）情态动词：当不是很确定时，用might或may. （might比may更不确定）who knows what will happen. you may even have married by then.it might be a tool for cutting things. i dont know.当确定某件事是唯一的可能时，用must.it must be some sort of toy.当确信不可能发生时，用cannot.i

19、t cannot be a radio because its too big to be a radio. ex. complete the sentences with might be / may be, cannot be, or must be.1. this exam _ too difficult for the students. i dont think they can finish it.2. it _ a book for children. there are many cartoons in it.3. it _ true. i think you made a m

20、istake. 4. mr. smith _ in london, paris, or tokyo. no one knows for sure. 5. that _ john. he is in new york now.6. did you hear the doorbell? it _ nicholas. i am expecting him.（三）read the descriptions about some famous inventors, and guess who they are.1. he lived in china in song dynasty. printing

21、was invented by him. who was he?2. he was british. he was born in edinburgh, scotland in 1847. he died in 1922. in 1876, he invented the first telephone. who was he?3. he is chinese. he went to a university in southwest china to study farming technology. he was called “the father of hybrid rice”4. t

22、hese two brothers were americans. when they were young, they started to wonder why birds could fly in the sky. then they started to make flying machines. they first tried to fly a plane in 1903.5. he was an american inventor. he was born to a poor family in 1847. his mother taught him at home. he of

23、ten observed things carefully and he liked to ask questions about them. he studied very hard and made over 1,300 inventions during his life time. one of his famous inventions was the light bulb.（四）重点词汇：1. in many big cities in the world, the overuse of cars is thought to be one of the major causes o

24、f air pollution.over名词/形容词，表示“过多，过于”the over-load truck caused a serious road accident.she always works overtime, so she has to leave her baby cared for by her mother.be thought to be 被认为，被看作she is thought to be the top student in our class.jane is thought to be busy preparing for the exam.2. howeve

25、r we are also warned not to ask for pretty colors, because the car will come in gray only.warnno one warned him of the danger.i warned her not to get close to the dog but she wouldnt hear of it.3. other experts are sure that the future will be happy.be sure thati am sure that smoking will hurt you.a

26、re you sure that john will come this afternoon?4. if gas is in short supply, the super car will run on water.be in short the cheaper it is, the better. im short of money.on 靠he finds it difficult to live on his salary.they live mostly on vegetables from their garden.5. as a rule, soft fruits like st

27、rawberries, etc, are difficult to freeze.as a rule 一般来说，通常是as a rule, she goes out early every evening looking for work.as a rule, we get home at 6.6. you should be careful the first time you wash your shirt because the blue color might come out and mark the white e out 开花，出版，退色，计算出来this mag

28、azine comes out monthly.some flowers have begun to come out.i washed the shirt twice but the ink still hasnt come out.7. observe 观察i observed a letter on the table.did you observe anything strange in that boys behavior?课堂练习i. 单选。1. have you ever this kind of moon cakes? a. eat b. eats c. eating d. e

29、aten2. the knives are used cutting things. a. in b. to c. for d. of3. they are used for the style of a shoe. a. change b. changes c. changing d. changed4. must i stay at home, mum? - no, you . a. neednt b. mustnt c. dont d. may not5. she asked them things about. a. not to litter b. dont litter c. not litter d. no litter6. im not sure he w