福建省龙岩市上杭县第二中学高中英语《Unit 3 Computers》学案 新人教版必修2.doc

unit 3 computersthe 3rd period: learning about language -the present perfect passive voice goals: 1. learn the present perfect passive voice.2. help the students master the way of using the correct voice, telling the differences between the active voice and the passive voice. teaching procedures:step 1: revision and lead-in1. check the homework first ex1: 1 totally 2 revolution 3 artificial intelligence 4 birth 5 simple-minded 6 go by 7 deal with 8 network 9 truly 10 anyway ex2:revolution; network;went by; totally; truly; simple-minded; anyway; deal with ex3:1 totally 2 amazed 3 exciting 4 excited 5 cheaply 6 unlucky2. lead-insay: are you familiar with these computers? can you call them? (ask the ss to distinguish different types of computers.)do you know these new inventions of computer ? a wrist-worn pc has been invented recently.a pen-like computer has already been developed.(show them some pictures and ask them to make some sentences , using the present perfect passive voice.)eg: its rather a hot day today! would you like to have a swim after school ?have you ever swum in the blue water world（蓝色水世界） in the oriental suntown (东方太阳城) which has been set up in taizhou?there a beautiful swimming pool has been built .many high buildings have been set up.lots of flowers and trees have been planted.a new bridge has been completed. step2: discoveringask the ss to discover whether these sentences have something in common. help them to learn the useful structure : the present perfect passive voice. step3: discussion : learning the structuregive some explanations1构成： 主动语态 被动语态现在完成时 have/has done-have/has been donehe has been sent to study the new technology in the company.the dirty clothes have not been washed.have the windows been cleaned?how many shopping centers have been built in this city?2. 只有及物动词才有被动语态，不及物动词（词组）没有被动语态, 如:happen, take place, die, appear, disappear, fail, remain, lie, last, sit ,stand, break out, come true, belong to等如：what has happened to your brother?3但许多不及物动词加介词或副词构成的短语动词，相当于及物动词，也可以有被动语态。但短语动词是一个不可分割的整体，变为被动语态时，不可丢掉构成短语的介词或副词。如：the child has been taken good care of by grandma wang all these years.a notice has been put up on the wallstep4: practice and exercises1.change the following sentences into the present perfect passive voice.!). we have completed all the preparations for the task, and were ready to start.2). this company has produced new types of computers.3). they have interviewed several teachers for the job.4). george has sent some texts and pictures to his friends cellphone.5). they have developed some programmes for the human resource department of their company.2.change the following sentences into the present perfect passive voice. put the verbs into correct form. recently we have bought a new personal computer. we have used the computer every day since we bought it. we have just joined our computer to the internet. however, we have found many problems with it. so we have decided to ask a professional man to fix it. soon he has fixed the computer. he has built a pc way we wanted . how excited we are! these days we have written a lot of e-mails on the computer. we have decided to write a report about the positive and the negative effects of using computers.3. do some exercises: choicestep5: using the structure : play a gamewhat has been decided.1. give the ss the situation : get into groups of four. your task is to decide what has been decided for the class .take turns to make the ideas as interesting or as lively as you can.2. give the ss some examples:s1: it has been decided that those who do not do heir homework will be asked to return to school on saturday. s2:it has been decided that those who keep the classroom tidy should be allowed to go home early everyday.s3:it has been decided s4: 3. ask them to collect the ones they all like best and be prepared to tell them to the class.step6: further study: 高考链接(this step can be done according to teaching needs.)1. -how long _ at this job? b - since 1990. a. were you employed b. have you been employed c. had you been employed d. will you be employed 2. when and where to go for the on-salary holiday _yet. (2003 上海春季) da. are not decided b. have not been d