高中英语人教版 (2019)必修 第二册Unit 3 The internet多媒体教学课件ppt
展开观察下列句子,体会现在完成时被动语态的用法:
1.Over time I have been changed quite a lt as a PC and then as a laptp I have been used in ffices and hmes since the 1970s.3.I never frget anything I have been tld !4.Since the 1970s many new applicatins have been fund fr me.
5. I have als been put int rbts and used t make mbile phnes…6. I have even been put int space rckets and sent t explre the Mn and Mars.
以上句子使用了现在完成时的被动语态,其谓语动词的构成为:
have/has been + dne
Wrkers have built the huse since tw years ag.
since tw years ag.
Exercise 1: Change the sentences int the present perfect passive vice
has been built
We have received many letters since last week.
Many letters have been received since last week.
Change the sentences int the present perfect passive vice
The buildings, destry, earthquake
The buildings have been destryed in the earthquake.
Exercise 2: Making up sentences using present perfect passive vice:
A calculating machine; replace; laptp
A calculating machine has been replaced with/by the laptp.
一.现在完成时(have/has + 过去分词)与 一般过去时的区别: 现在完成时的动作或情况虽然发生在过去,但它强调的是与现在的关系,用来说明现在的情况。现在完成时不能与表示确定的过去时间的状语连用, 如: yesterday, tw weeks ag, in 1978, when I gt there 等.
现在完成时常与 already, always, ften, ever, never, yet, , just等不表示明确的时间副词连用, 还可以和表示时间一直延续到目前的带since, fr 的状语及包括现在在内的词连用。如: nw, tday, this mnth, this year, recently, these few days 等。 一般过去时则是表示过去某时发生的动作或情况, 与现在毫无关系。
1. 主语是行为动作的承受者。如:The Temple f Zhang Fei has been rebuilt. 张飞庙已经重建过。2. 说话时已经完成的动作或出现的结果。如: The dr has been lcked. 门已经被锁上了。
二.现在完成时的被动语态的用法:
(我或别人现在进不去)
3. 动作或状态始于过去, 持续到现在, 并可能 持续下去。如: He has been tld abut it fr many times. 有人告诉他这事很多次了。 (可能还会有人告诉他)
4. 用在时间和条件状语从句中, 表示将来某时已完成的动作。如:We’ll leave as sn as the wrk has been finished. 工作一完成我们就立即离开。
副词的位置ften, usually, always, never, hardly,seldm等副词置于have/has和been中间。Such a man has hardly been believed.
2. 并不是所有动词都有被动语态 happen, take place, break ut, belng t, cst, last等不及物动词或词组无被动语态。如: Great changes have taken place in China since 1978.
3. 短语动词不可分割,相应的介词要带上。如:The SARS patients have been taken gd care f.
1. 现在完成时被动语态肯定句主语+has/ have been +动词过去分词Her mtrbike has been stlen.她的摩托车被盗了。All the ffices have been linked by cmputer.所有的售票处由计算机联网工作。
2. 现在完成时被动语态否定句主语+has/ have +nt+ been+动词过去分词The task has nt been finished yet.任务尚未完成。Many skilled wrkers have nt been trained in the cmpany.这家公司并没有培养多少熟练工人。
3. 现在完成时被动语态一般疑问句Has he(she, it,单数名词) been +动词过去分词?Has a new cmputer been bught?买了一台新电脑吗?Have they been sent abrad t study English?他们已经被派往国外学英语了吗?
4. 现在完成时被动语态特殊疑问句疑问词+have (has)+主语+been+动词过去分词?What has been bught by Tm?汤姆已经买了什么东西?Wh have been helped by the new cmputer?谁已经得到这种新计算机的帮助?Hw many buildings have been built in this schl?这所学校已经建造了多少座大楼? Where has the car been repaired?这辆小汽车已经在哪里修理好了?
Enjy a pem!
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