人教版 (新课标)必修1&2Unit 3 Computers说课ppt课件

这是一份人教版 (新课标)必修1&2Unit 3 Computers说课ppt课件，共29页。PPT课件主要包含了动作的执行者，动作的承受者，谓语动词，注意二， 注意三， 注意四，注意五，has lived，练习1，练习2等内容，欢迎下载使用。
Test yurself by writing dwn the past frm &the past participle f thse verbs.
catchdealdriveadmitsellfallwrite
teachrisechsebiteeatbreakgive
cstmeanleadblwburstcutprefer
caught caughtdealt dealtdrve drivendamitted admittedsld sldfell fallenwrte written
teachrise chsebiteeatbreakgive
taught taughtrse risenchse chsenbit bittenate eatenbrke brkengave given
cst cstmeant meantled ledblew blwnburst burstcut cutpreferred preferred
回顾一般将来时被动语态
Our schl will build a swimming pl next year.

被动语态:
A swimming pl will be build in ur
A swimming pl will nt be build in
schl next year.
被动否定式：
ur schl next year.
被动一般疑问式：
对划线部分提问：
Will a swimming pl be build
in ur schl next year?
When will a swimming pl be
build in ur schl?
1、过去发生的动作对现在造成的影响。
2、过去的动作或状态持续到现在并且已经完成或可能持续下去。
【考点精讲】 现在完成时1. 常与以下时间状语连用：recently, yet, already, just, befre, lately,since+时间状语（从句）”,“fr+时间段”, (ever) since, these days, befre, s far, in the last/past few years, up t nw, till nw，by+现在时间…等。*I have just/alreay turned ff the light. *They have been gd friends since they met at a meeting. * She has wrked in the schl fr ten years.
2. 在条件、时间、让步状语从句中, 表示将来某时已完成的动作。*I shall pst the letter as sn as I have written it. 3. 下列句型中常用现在完成时: ①It is(has been)+一段时间+since从句(从句用一般过去时)②This (That/It) is the first(secnd. . . )time+that从句(从句用现在完成时)
Wrkers have built the huse.
has been built
The Present Perfect Passive Vice现在完成时的被动语态
1. S even the live wreath ________________ (replace)!2. First as a PC (persnal cmputer) and then as a laptp, I ______________(use) in ffices and hmes since the 1970s.3. Over time my memry has develped s much that, like an elephant, I never frget anything I ____________ (tell)!
has been replaced
have been used
have been tld
The structure f the present perfect passive vice is: ___________________
have / has + been + dne
现在完成时的被动语态结构
肯定式:否定式：一般疑问式：特殊疑问式：
主语+ have / has + been + dne+其他.
主语+ have / has + nt + been + dne+ 其他.
Have/Has+ 主语+ been + dne+其他？
提问主语：特殊疑问词+have/has+been + dne+其他？提问其他：特殊疑问词+ 一般疑问句？
The experiment has been dne successfully.
The experiment has nt been dne successfully.
Has the experiment been dne successfully.
Hw has the experiment been dne successfully？
What has been dne successfully？
【注意一】1. 注意与一般过去时被动语态的区别。
一般过去时仅表示一个过去的动作或事实，与现在无关； 现在完成时则表示一个过去的动作对现在的影响，或一直持续到现在，与现在有关。
The machine has been repaired．
The machine was repaired yesterday．
2. 副词的位置 ften, usually, always, never, hardly, seldm等副词置于have / has和been中间。如: [误] Such a man has been hardly believed. [正] Such a man has hardly been believed.
3. 并不是所有动词都有被动语态 happen, take place, break ut, belng t, cst, last，taste wash等不及物动词或词组无被动语态。 [误] Great changes have been taken place in China since 1978. [正] Great changes have taken place in China since 1978.
4. 短语动词不可分割或省略其中的介词或副词。病人们被护士们照顾得很好。The patients have been taken gd care f by the nurses.这个棘手的问题已得到妥善处理。 The tugh matter has been dealt with prperly.
5. 表示短暂意义的动词（动作不能持续），如：cme, g, start, begin, leave, arrive, reach, get, marry, pen, brrw, finish, break, see, hear, die，其现在完成时的肯定式不能和表示一段时间的状语连用。若要表达相应意思，需改动词或时态。
(1) I have bught the new car fr a mnth.I have kept/ had the new car fr a mnth.(2) Hw lng has this bk been bught? Hw lng ag was this bk bught?
1. My friend has bught a new persnal cmputer. A new persnal cmputer has been bught by my friends2. The shp has repaired my cmputer very quickly. My cmputer has been repaired by the shp very quickly .
练习1: 把下列主动句变成现在完成时被动语态
3. We have planted sme trees arund the lake. 4. My father has tld the stry many times.
Sme trees have been planted arund the lake.
The stry has been tld many times.
a new bridge, build,in ur city
A new bridge has been built in ur city.
练习2：: 用现在完成时被动语态造句:
Many buildings, destry, earthquake
Many buildings have been destryed in the earthquake.
1. Since he was brn, he _________ in the small twn. (live)自从出生以来，他一直在这里住着。
现在完成时及被动语态训练题
2. By nw, the cnstructin f the new bridge ________________ . (cmplete)到现在为止，那座新桥的建设已经竣工了。
3. Mre than 30 Hpe Primary Schls______________all ver China in the past 5 years. (build) 在过去的五年里，全中国已经建立了30多所希望小学。
has been cmpleted
4. When and where t g fr the n—salary hliday _________________ (decide) yet.
5. --------- What happened t that wman selling newspapers? ---------- I dn’t knw. She ____________________ arund here fr a lng time. (see)
hasn't been decided
has nt been seen
现在完成时及被动语态训练题
6. It is the first time that the EXPO _________________ in a develping cuntry. (hld)
has been held
7.Over the past five years, this small twn ________________ twice by earthquakes. (hit)
has been hit
8. Since the 1970s many new applicatins _________________fr me. (find)
have been fund
Change the fllwing sentences int the present perfect passive vice.
1. My friend has bught a new persnal cmputer.2. The shp has repaired my cmputer very quickly.3. An unknwn virus has just attacked my cmputer.4. We have nt slved the prblem yet.5. The cmpany has given its cmputers away t a lcal schl.6. The scientists have develped a kind f intelligent rbt.
Check yur answers!
1. A new persnal cmputer has been bught by my friend.2. My cmputer has been repaired by the shp very quickly.3. My cmputer has just been attacked by an unknwn virus.4. The prblem has nt been slved by us yet.5. The cmputers have been given away t a lcal schl by the cmpany.6. A kind f intelligent rbt has been develped by the scientists.
Hmewrk D the grammar exercise n ChangJiang Bk.
练习4 单句改错。1. Tm's nvel has been nt published.2. The cmputer was used every day since we bught it.3. David and Lucy married fr 3 years.4. The injured bird has been lked since it was saved.5. A gd idea has been cme up at the meeting.