高中英语人教版 (2019)必修 第二册Unit 3 The internet教案

这是一份高中英语人教版 (2019)必修 第二册Unit 3 The internet教案，共4页。
[教学目标]
1. Guide students t review the basic usages f the Present Perfect Passive students t learn t use sme special cases cncerning the Present Perfect Passive Vice flexibly.
2. Enable students t use the basic phrases structures flexibly.
3. Strengthen students' great interest in gram mar learning.
[教学重难点]
1. Help students t appreciate the functin f the Present Perfect Passive Vice in a sentence.
2. Instruct students t write essays using the prper the Present Perfect Passive Vice.
[教学过程]
Step 1：Reviewing引导学生观察下列句子特点，总结共同点。
1.（教材P28）Much has been written abut the wnders f the Wrld Wide Web.
2.（教材P28）But the Internet has dne much mre fr peple than simply make life mre cnvenient.
3.（教材P28）Many peple have been helped by the club.
4.（教材P28）She n lnger feels lnely，and her cmpany has becme quite successful.
5.（教材P32）Tday I thught I'd blg abut a questin that has been asked many times--hw d yu stay safe nline and avid bad experiences n the Internet？
Step 2：Presentatin
一、常与现在完成时连用的时间状语有：already已经
yet已经
recently/lately 最近
since then 从那时起
ever since自那以来
ever曾经
s far迄今为止
by nw到现在为止
fralngtime很长--段时间
in recent years在最近几年里
in/during/ver the pastlast years在过去的几年里
二、现在完成时态的意义。
1.现在完成时的被动语态强调一个发生在过去的被动性的动作，动作已完
成并强调对现在造成的影响或结果，主语和请语之间为被动关系。
The dr has already been lcked.
门早已经被锁上了。
I have been emplyed at the jb since 2015.
自从2015年，我就做这份工作。
2.基本构成
现在完成时的被动语态的结构为has/have been dne.
A lt f mney has been spent t prtect the ld temple by nw.
到目前为止已投入了大笔钱来保护这座古庙。
These trees have been wa tered lately.
那些树最近已浇水。
2）带有双宾语的动词，如give，send，bring，take，teach，shw，tll，make，sing，write，read，sl，buy，pay，lend，puss，prmise等，变为被动语态时，-般将间接宾语变为被动语态的主语，若将直接宾语变为被动语态的主语时，间接宾语前面要
用相应的介词。
We have given him the bk.
He has been given the bk.
The bk has been given t him.
现在完成时的被动语态的用法
1.现在完成时的被动语态同它的主动语态一样，强调过去的动作对现在造
成的影响或结果，通常与alrady，yet，just，never，recently等副词连用。
◆The machine has already been repaired.
机器已经修好了。
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..2”句型中。
◆Financial prblems f the cmpany have been discussed fr nearly tw hurs.
公司的财务问题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 shuldn't leave schl befre yur hmewrk has been finished.
在你的作业没完成之前你不应该离开学校。使用现在完成时的被动语态要注意的问题
1.现在完成时的被动语态、现在进行时的被动语态及--般过去时的被动语
态的区别
The mac hine has been repaired.（说明动作发生在过去，对现在有影响，“现在修好了”）
The mac hine is being repaired nw.（说明动作正在进行）
The mac hine was repaired yesterday.（只说明动作发生在过去）
2.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--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，例如：工程已开始三个月了。
The prject has been started fr three mnths.（F）
The prject has been n fr three mnths.（T）
3.带有复合宾语的动词变为被动语态时，若宾语补足语为省略t的不定式充当时，在被动语态中需将省掉的t加上。
The bss has made his cmpany ffer mre chances fr peple t wrk. →His cmpany has been made t ffer mre chances fr peple t wrk.
（4）动词短语是一个不可分割的整体，在被动语态中要保持其完整性，其中的介词或副词不可省略。
I's said that the prblem has been lked int.
据说已经调查了这个问题。