人教版 (新课标)必修1&2Unit 3 Computers课文配套ppt课件

这是一份人教版 (新课标)必修1&2Unit 3 Computers课文配套ppt课件，共24页。PPT课件主要包含了has been，have made，replace，computer，Review，Who am I 等内容，欢迎下载使用。
1 Review the Present Perfect Tense2 Master the structure and rules f the Present Perfect Passive Vice 3 Review the passive vices
What will we learn tday?
What is the Present Perfect Tense ???
The Present Perfect Tense现在完成时
表示过去发生或已完成的动作对现在造成的影响和结果；表示过去已经开始并一直持续到现在的动作或状态基本构成： have / has dne
eg. He ____________(be) ill fr three days. I __________(make) great prgress in English.
Scientists have develped a kind f intelligent rbt.
scientists,develp, a kind f intelligent rbt
A kind f intelligent rbt has been develped by scientists.
the calculating machine
The calculating machine has been replaced by the cmputer.
Over time I ___________________(change) quite a lt.First as a PC and then as a laptp, I _______________ (use) in ffices and hmes since the 1970s.Over time my memry has develped s much that, like an elephant, I never frget anything I _____________________ (tell)Since the 1970s many new applicatins _____________ (find) fr me.I _______________ (put) int rbts and used t make mbile phnes as well as help with medical peratins.I ______________(put) int space rckets and sent t explre the Mn and Mars.
have been used
have been tld
have been changed
have been fund
have been put
现在完成时被动语态构成：
基本形式：have/ has + been + dne
这所新学校已经被建立起来了。The new schl has been set up.
否定式为：have / has + nt + been + dne一般疑问式为： have / has提到主语的前面特殊疑问句为：疑问词 + have / has + been + dne
1 The party has been planned since the new year.(变为否定句)2 The results f their experiments have already been published.(变为一般疑问句)3 Tw experiments have been dne by the students this mnth.(变为特殊疑问句)
The party has nt been planned since the new year.
Have the results f their experiments been published yet?
Hw many experiments have been dne by the students this mnth?
Rules：1 现在完成时表示过去开始的被动动作一直持续到现在，常与之连用的时间状语有：fr或 ver+ 一段时间，since + 时间状语(从句)，these days, s far, up t nw, in the last (past) few years 等；(1) This lessn ________________(teach) by Mr. Brwn fr tw years.(2) His Chinese ________________(imprve) a lt since he came t China.(3) JK Rwling’s nvels __________________(translate ) int many freign languages s far.
has been taught
has been imprved
have been translated
2 表示某被动动作对现在造成的影响或结果，常与already, yet, just, ever, never, recently 等连用；We have learned 2000 English wrds . The bike ___________________ (nt repair) yet.
has nt been repaired
3 带有双宾语的动词，如：give, send, shw, take, bring, teach, tell, write, read, sell, buy, pay, lend等，变为被动语态时，可将其中一个宾语变为主语。
eg. I have given him the bk. He has been given the bk by me. The bk has been given t him by me.
new bridge, build, in ur city
A new bridge has been built in ur city.
Many trees have been planted alng the rad.
many trees , plant,alng the rad
The bk has been belnged t me fr nearly 2 weeks.
True r false???
不及物动词或短语 happen ,take place, break ut ,die, appear, disappear, fail, remain, lie, stand, cme true, belng t, cst , last 等不用于被动语态。
2. The child has been taken gd care by the ld man fr five years.
不及物动词加介词或副词构成的动词短语可以有被动语态，但在变被动语态时不能丢掉介词或副词。
3. Our cmputer just has been jined t the Internet.
在现在完成时的被动语态中，ften, usually, always, never, hardly, seldm等副词应置于have/has和been中间。
My friend has bught a new persnal cmputer.2. The shp has repaired my cmputer very quickly.My cmputer has been repaired very quickly by the shp.
A new persnal cmputer has been bught by my friend.
用被动语态改写下列句子。
3 An unknwn virus has just attacked my cmputer.My cmputer has just been attacked by an unknwn virus.4 We have nt slved the prblem yet.The prblem has nt been slved yet.5 The cmpany has given its cmputers away t a lcal schl.The cmpany’s cmputers have been given away t a lcal schl.
用所给动词的正确形式填空：1 The task ______________________________(finish) yet. 2 The cmputer _________________________(repair) yesterday.3 He ____________________(send) abrad next mnth.4 The dictinary __________________(find) since last week.5 All the preparatins _____________________ (cmplete), and we are ready fr the trip.
Summarizatin
1 The meaning 表示过去发生或已完成的动作对现在造成的影响和结果；2 The structure have/ has + been + dne3 The usage4 The tips
A pem fr yu
Lk at the way yur face has been washedLk at the way yur hair has been cmbedLk at the way yur shes have been cleaned Yu’d better d them again.Lk at the way the flwers have been plantedLk at the way the grass has been cutLk at the way the paths have been sweptI hpe that yu’ll cme here again