1、Unit4 Topic 2 Section A教案. Teaching aims and demands 1. Learn some new words:metal, toothbrush, ink, recorder2. Learn some useful sentences:Whats it made of/from? Its made of/fromWhats it used for?Its used for 3. Learn the simple past passive voice:(1)When was it developed?Around 1998. (2)Where was
2、it developed?It was developed in Korea.4. Learn how to express hopes and wishes:(1) I wish I could go into space some day.(2) I hope your dream will come true.5. Talk about new technologies and inventions. .Teaching procedureStep1. GreetingStep2. Revision 1. Revise the new words in Section A (Words
3、competition)1) 火箭 rocket 2) 金属 metal 3) 卫星 satellite 4) 牙刷 toothbrush 5) 墨水 ink 6) 录音机 recorder 7) 数字，数码的 digitalStep3. Presentation 1. Show two pictures, a computer desk and a piece of paper. Ask and answer. Master the phrases “be made of”, “be made from” and “be used for”.T: Whats this in English?
4、Ss: Its a computer desk.T: Whats it made of ?Ss: Its made of wood.T: Whats it used for ?Ss: Its used for holding a computer.2. Talk about the picture of a paper. Teach the phrase “be made from” in the same way and ask students to learn and master it. Let students compare the two phrases, and help th
5、em sum up the usages and differences between them.be made of + 材料：表示原材料容易被看出。be made from + 材料：表示原材料经过化学变化，不易被看出。3. Dialog gamesT: OK, lets imitate the examples in 1b to make similar conversations and finish 1b.you can choose one picture from A to H to do pair work. Act them out in the front of the
6、classroom. Let Ss pay attention the prepositions.A. toothbrush/ plastic/ brush teeth B. red wine/ grapes/ drink C. ruler/ steel/ measure D. sweater/ cotton/ keep warm E. towel/ cotton/ clean face F. ink/ carbon/ write inG. lift/ iron/ go up and down H. bed/ iron/ sleep4. Let students listen to 1a an
7、d under line the sentences with the passive voice. Answer two questions.1)Whats it made of ? 2)Do you know what it is used for ?5. Let students read 1a and lead them to find out the key sentences and the difficult language points in 1a. The teacher explains them. For example:1) Im not allowed to pla
8、y computer games.2) I wish I could go into space some day.3) I hope your dream will come true.Step 4 Consolidation1. T: Listen to the tape carefully and finish the table. Answer the following questions.1) When was it developed ?2) Where was it developed ?3) Whats it used for ?2. Finish 2b.Step 5 Pra
9、ctice 1. Work in pairs. Let students read 2a and act it out.2. Let students observe the differences between the sentence pattern “ It is used for” and the sentence pattern “ It was developed in ”. Lead to the past passive voice. Let students master the sentence patterns “When was it developed ?” and
10、 “Where was it developed ?”was/were+Vpp.It was developed in Korea.The bridge was built in 1990.The cup was used in old days.3. T: Read 2a, and underline the key words.an MP3 player, be used for, help us to improve our English, develop,around 1998, Korea, more useful, recorder, buy4. Work in pairs. L
11、et students use the content of 2b to make dialogs similar to 2a and practice the usage of the simple past passive voice. Act them out. Finish 2b.T: How do you say it in English?Ss: Digital camera. T: When was it developed?Ss: It was developed in 1975. T: Where was it developed?Ss: It was developed i
12、n America. T: Whats it used for?Ss: Its used for taking photos. T: Do you understand? Practice the dialogs with your partner. Lets begin. 5. Do some exercises I. Choose the right answers. You can do it.( )1.He _play computer games unless he finished his homework.A. was allowed to B. was not allowed
13、to C. allow to( )2.We all know that paper _wood.A. is made of B. is made into C. is made from( )3.This kind of machine _in 2006.A. is invented B. is made C. was invented( )4.A(An)_is used for taking photos.A .Camera B. Lift C. MP3 player( )5 .We should spend more time _because its too important.A .t
14、o learn English B. learning English C. in English. Change the following sentences.1.My mother allows me to use her cellphone.(改为被动语态)I _ _ _ use my mothers cellphone.2.A rocket is used for launching satellites and spaceships.(就画线部分提问)_ _ a rocket _ _?3.The digital camera was invented in 1975. (就划线部分
15、提问)_ _ the digital camera _ ?4. Maybe he is an inventor. (改为同义句)He _ _ an inventor.5.Whats this in English? (改为同义句)_ _ you _ _ in English?. Fill in the blanks with the right prepositions.1.The desk is made _ wood.2.The red wine is made _ grapes.3.This delicious cake was made _my mother.4.Glasses are
16、 made _ glass.5.Our group is made up _ four students.6.That kind of machine is made _ Japan.Step 6 Sum upLet students sum up the language points.Phrases 1)be allowed to do sth 2)spend on 3)show sth to sb 4)be made of 5)be made from 6)go into space 7)some day 8)come true9)be used for doing sth Senten
17、ces1.I am not allowed to play computer games.2.Its bad for your health if you spend too much time on them.3.I wish I could go into space some day.4.I hope your dream will come true.5.Its used for writing on.6.Its made of wood.7.Its made from wood.Grammar一般过去时的被动语态结构:助动词 be+及物动词的过去分词1.肯定句式 ：主语+was /w
18、ere+vt.-ed2.否定句式 ：主语+was/were + not+vt.-ed3.一般疑问句式： Was /Were+主语+vt.-ed4.特殊疑问句式：疑问词 W/H+was/were+subject+vt.-edStep 7 Project 1. Work in pairs. Find out some latest inventions, such as MP5 players make a conversation about time, place and the usage of the invention.Step 8 Homework:1. Finish off the exercises in Wb.2. Learn the important phrases and sentences by heart.3. Preview Section B.
