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1、Book2 unit3 GrammerPresent perfect passive voiceobserving 1 look at the following sentence,paying attention to the underlined part：主动：1.He has repaired the machine for two hours.（他修理这台机器已有两小时了）被动：The machine has been repaired for two hours.（这台机器已修了两小时了）主动：2.The teacher has borrowed the books.（老师把那些书
2、借走了）被动：The books have been borrowed by the teacher.（那些书被老师借走了）This morning our physics teacher did a lightning experiment.The experiment has been done successfully.However,the conclusion of the experiment has not been accepted by most of us.“Has the experiment been done improperly?What has been done
3、 by Franklin in the past?”He asked himself.现在完成时的被动语态现在完成时的被动语态的构成的构成：现在完成时被动语态的构成：现在完成时被动语态的构成：肯定式为：肯定式为：have/has+been+done否定式为：否定式为：have/has+not+been+done一般疑问一般疑问:have/has +been+done特殊疑问：特殊疑问：疑问词疑问词+have/has+been+done现在完成时的被动语态现在完成时的被动语态用法：用法：1.过影响现过影响现（过去过去已经发生的动作对已经发生的动作对现在现在造造成的影响）成的影响）I have b
4、een beaten by my father twice.2.过持到现过持到现（过去已经发生的动作一直持续（过去已经发生的动作一直持续到现在。）到现在。）3.主语为动作的主语为动作的承受者承受者（即主语被（即主语被）present(now)futurepast 现在完成时现在完成时(present perfect tense)do my homework 常与现在完成时连用的常与现在完成时连用的时间标志：时间标志：already(已经),yet(已经),just(刚刚),ever(曾经),lately,recently,since then,up to now,so far,ever sin
5、ce,by now,in/during/over the past/last years.划出下列句中时间标志词：I have already posted the letter.He hasnt done his homework yet.Have you ever been to Beijing?Ive worked in the school since 1999.Hes lived in Shenzhen for 6 years.I have already posted the letter.He hasnt done his homework yet.Have you ever b
6、een to Beijing?Ive worked in the school since 1999.Hes lived in Shenzhen for 6 years.101现在完成时的被动语态有两个助动词，即 have has和been，两者缺一不可。2.并不是所有动词都有被动语态，不及物动词或短语没有。3.短语动词不可分割也不可省略短语的介词或副词。例如：The orphan has been well looked after这位孤儿一直受到很好的照顾。现在完成时的被动语态现在完成时的被动语态注意事项注意事项：4 副词的位置副词的位置often,usually,always,never
7、,hardly,seldom等副词Such a man has never been believed.5注意与一般过去时被动语态的区别。一般过去时的被动语态侧重过去发生的动作；而现在完成时被动语态侧重说明对现在造成的影响和结果。例如：The house was built last year这房子是去年建造的。The house has been built这房子已经建好了。Dear parents,we hope you will welcome this news.Almost 100 computers (give)to us by a local computer company s
8、ince the end of last year.A decision (make)that we will begin a computer teaching experiment in our school.So every teacher (provide)with a laptop since the beginning of this term.Since then,most of our courses (teach)using computer.A lot of information _(take)from internet to help us with our teach
9、ing.Besides,a new computer room (set up)in our school.We start this experiment together with the City Information Technology Centre,which (complete)recently.We hope you will help us with this exciting new development in our school.No 7 Middle School12/08/20_Homework Almost 100 computers _ (give)to u
10、s by a local computer company since the end of last year.A decision _ (make)that we will begin a computer teaching experiment in our school.So every teacher _(provide)with a laptop since the beginning of this term.since then,most of our courses _ (teach)using computer.A lot of information _ _(take)f
11、rom internet to help us with our teaching.Besides,a new computer room _ (set up)in our school.We start this experiment together with the City Information Technology Centre,which _ (complete)recently.We hope you will help us with this exciting new development in our school.have been givenhas been madehas been providedhave been teachedhas been takenhas been set up has been completed