高中英语人教版 (2019)必修 第二册Unit 3 The internet多媒体教学ppt课件

这是一份高中英语人教版 (2019)必修 第二册Unit 3 The internet多媒体教学ppt课件，共47页。

[否定式]have/has＋ nt＋ been＋ dneThe desks have nt been cleaned.这些桌子还没有擦干净。[疑问式]Have/Has＋主语＋been＋dne?—Has the dr been painted？那扇门粉刷了吗？—N，it hasn’t.不，还没有。
二、现在完成时被动语态的主要用法1．表示过去发生的动作对现在造成的影响与结果。当动词为短暂动词时，可与already或yet连用，但不能与fr或since引导的表示一段的时间状语连用。I’m srry，but the letters haven’t been typed yet.很抱歉，这些信件还没有被打印出来。(结果是，现在还拿不到这些信件)The wrk has already been finished.工作已完成了。(结果是，现在不用做这项工作了)
2．表示一个被动的动作或状态开始于过去，持续到现在，并有可能持续下去，常与fr或since引导的时间状语连用，或用于Hw lng...？句型中。The plan has been discussed fr nearly 2 hurs.这项计划已被讨论了近两个小时了。
3．用在时间或条件状语从句中，表示将来某时已完成的动作，即用现在完成时的被动语态代替将来完成时的被动语态。Yu can g hme as sn as yur task has been finished.你的任务一完成就可以回家。
三、使用现在完成时的被动语态要注意以下几点1．现在完成时的被动语态的两个助动词，即have/has和been，两者缺一不可。2．与一般过去时的被动语态的区别。一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在情况有联系。The library was built last year.这座图书馆是去年修成的。The library has been built.这座图书馆已经修好了。
3．非延续性动词，如brrw，finish，begin，start，buy，marry，pen，jin等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，则要改换动词或时态。
Hw lng has he jined the army？(×)Hw lng has he been in the army？(√)他参军多长时间了？点津：这类动词的否定式可表示动作的持续过程，具有持续性，因而可与since或fr构成的时间状语连用。
(2010·福建卷)Every year a fld f farmers arrive in Shenzhen fr the mney­making jbs they________befre leaving their hmetwns.A．prmised　　B．were prmisedC．have prmised D．have been prmised
解析：　考查时态和语态。jb与prmise之间为被动关系，故应考虑被动语态形式，再考虑到“befre leaving their hmetwns”，表示动作已经发生，故用完成时。所以现在完成时的被动式为正确形式。答案：　D
(2009·全国卷Ⅰ)His sister left hme in 1998，and________since.A．had nt been heard f B．has nt been heard fC．had nt heard f D．has nt heard f
解析：　考查谓语动词的时态和语态。 句意为：他姐姐在1998年离开了家，此后人们再也没有听到她的消息。根据句意可知应用被动语态，句中的since暗示应用现在完成时，因此答案为B。答案：　B
(2008·陕西卷)Thugh we dn’t knw what was discussed，yet we can feel the tpic________.A．had changed B．will changeC．was changed D．has been changed
解析：　考查动词时态、语态。句意为：尽管我们不知道讨论的内容，但我们能感觉到讨论的话题变了。根据题意，句子应用被动结构，排除A项和B项，又根据时态一致，排除C项。答案：　D
Ⅰ.用所给词的适当形式填空1．Great changes________ ________ ________(take place) in my village since 2008.答案：　have taken place2．The tickets________ ________ ________ ________(already sell) ut.Yu wn’t get ne as yu want.答案：　have already been sld
3．________the prgram________ ________(develp) yet？If nt，yu’d better get it ready as sn as pssible.答案：　Has；been develped4．—Are yu ging t the party?—N，I________ ________ ________(nt invite) yet.答案：　haven’t been invited
5．Jack________ ________ ________(tell) the news，s yu needn’t call him up.答案：　has been tld6．Mre than 5,000 used bikes________ ________ ________(cllect) since the tw brthers set up the rganisatin.答案：　have been cllected
7．Since the cause f this disease________ ________ ________(discver)，nw we need t develp the medicine t treat it.答案：　has been discvered8．Every pssible means________ ________ ________(try) t stp the bad behavir，but they dn’t wrk at all.答案：　has been tried
9．Over the past ten years，this twn________ ________ ________(hit) twice by earthquakes.答案：　has been hit10．Her nvel is very ppular amng peple f all ages；s far it________ ________ ________(translate) int 25 languages.答案：　has been translated
Ⅱ.单项填空1．—Is the meeting held in Rm 302 r 303?—It shuld be 302.But I hear that it________till tmrrw.A．was put ff B．will put ffC．has been put ff D．is put ff
解析：　根据句意应是“我听说会议已推迟到明天了”。put ff (推迟)，与meeting之间为被动关系。会议现在已被推迟，故用现在完成时的被动语态。答案：　C
2．—What happened t the pstman?—I dn’t knw.He________arund here fr a lng time.A．hasn’t seen B．didn’t seeC．wasn’t seen D．hasn’t been seen
解析：　由时间状语fr a lng time可知到说话时为止很长时间没有见到邮递员了，邮递员与看见之间为动宾关系，故用现在完成时的被动语态，所以选D项。答案：　D
3．Till nw，three films________in ur village this mnth.A．have shwn B．have been shwnC．were shwn D．will be shwn
解析：　考查时态及语态。由时间状语till nw “直到现在”可知用现在完成时，又因film与shw之间是被动关系，故用现在完成时的被动语态。答案：　B
4．Every pssible means________t save the wunded sldier up t nw.A．was tried B．were triedC．have been tried D．has been tried
解析：　由时间状语up t nw可知应用现在完成时。另外，主语means与try之间为被动关系，故用被动语态。means为单复数同形的单词，由其前的every可知此处作单数名词，故选D项。答案：　D
5．The bys________many times nt t swim in that lake，but it desn’t make any difference.A．have tld B．tldC．have been tld D．were being tld
解析：　根据句意可知，the bys和tell之间是被动关系，故用被动语态；又根据but后面的分句可知，应用现在完成时，故答案选C项。答案：　C
6．—Can we sit at the table near the windw?—I’m srry，but it________already.A．was taken B．tkC．has taken D．has been taken
解析：　it代指the table，和take之间是被动关系；又根据already和句意可知用现在完成时，故答案选D项。答案：　D
7．I’ve heard that a talk n American histry________in the meeting rm this Friday.A．is given B．has been givenC．will be given D．gives解析：　根据句意，报告是在下周要做，故用一般将来时态的被动语态。答案：　C
8．I want t buy this kind f clth because I________the clth________well.A．have tld；washed B．have been tld；washesC．have been tld；washed D．was tld；washed
解析：　根据句意“因为我被告知这种布很好洗”可知第一空用完成时的被动语态；第二空表示主语具有的属性，用主动表被动，故用washes。答案：　B
9．The new dictinaries are very useful.They________well and________already.A．sell；have been sld ut B．sld；had sld utC．sell；sell ut D．are sld；have been sld ut
解析：　第一空sell说明主语的性质，为不及物动词用法，不能用于被动语态；第二空根据副词already可知“已卖完了”；且sell ut(售完)与dictinaries间为被动关系，故选A项。答案：　A
10．(2010·聊城高一检测) A new schl library________here.It is said that they hpe t finish it next mnth.A．will be built B．is builtC．has been built D．is being built
解析：　由后一句“据说他们希望下一个月完工”可知目前图书馆正在建设中，故用现在进行时态的被动语态。答案：　D
11．When yu get the paper back，pay special attentin t what______.A．have marked B．have been markedC．had marked D．had been marked解析：　根据前面的时态，此处应该使用现在完成时的被动语态，表示已被标志的部分。答案：　B
12．—The windw is dirty.—I knw.It________fr weeks.A．hasn’t cleaned B．didn’t cleanC．wasn’t cleaned D．hasn’t been cleaned
解析：　考查时态及语态。句意为：——窗户很脏。——我知道。已经好几周没擦了。windw和clean是被动关系且强调发生在过去的动作影响到现在。所以要用现在完成时的被动语态。答案：　D
13．—Why des Lingling lk s unhappy?—She________by her classmates.A．has laughed B．laughed atC．laughed D．has been laughed at
解析：　答句中由by可知“她被同学笑话了”，laugh at短语动词，被动语态中不能省略介词。答案：　D
14．Prfessr James will give us a lecture n Western culture，but when t begin________yet.A．hasn’t been decided B．haven’t decidedC．isn’t being decided D．aren’t decided
解析：　由时间状语yet可知，应用现在完成时；又因decide和“讲座开始的时间”存在被动关系，故应用现在完成时的被动语态。答案：　A
15．—Hw many times________nt t play with fire?—I’m srry.I’ll never d that again.A．d yu tell B．had yu tldC．are yu tld D．have yu been tld