2020-2021学年新人教版Unit 3 The Internet Period3 Discovering Useful Structure教案.docx

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1、Unit 3 The Internet Period3 Discovering Useful Structure 教学目标1. Guide students to review the basic usages of the Present Perfect Passive Voice.2.Lead students to learn to use some special cases concerning the Present Perfect Passive Voice flexibly.2. Enable students to use the basic phrases structur

2、es flexibly.3. Strengthen students* great interest in gram mar learning.教学重难点1. Help students to appreciate the function of the Present Perfect Passive Voice in a sentence.2. Instruct students to write essays using the proper the Present Perfect Passive Voice. 教学过程Step 1 ： Reviewing引导学生观察以下句子特点，总结共同

3、点。1 .（教材P28） Much has been written about the wonders of the World Wide Web.2 .（教材P28） But the Internet has done much more for people than simply make life more convenient.3 .（教材P28） Many people have been helped by the club.4 .（教材P28） She no longer feels lonely, and her company has become quite succe

4、ssful.5 .（教材P32）Today I thought Id blog about a question that has been asked many times-how do you stay safe online and avoid bad experiences on the Internet?Step 2： Presentation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so far迄今为止by now到现在为止foralongtime很长一段时

5、间in recent years在最近几年里in/during/over 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 door has already been locked.门早已经被锁上了。I have been employed at the job 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 done.A lot of money has be

6、en spent to protect the old temple by now.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, show, tlL make, sing, write, read, sh buy, pay, lend, puss, promise等，变为被动语态时，-般将间接宾语变为 被动语态的主语，假设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 th

7、e book.He has been given the book.The book has been given to 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for或 since引导的时间状语连用，或用于How long.2”句型中。Financial proble

8、ms of the company have been discussed for nearly two hours.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。 You shouldn*t leave school before your homework 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一般过去时的被动语态的区别The mac hine has been repa

9、ired.（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 now.(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borrow, finish, begin, start, buy, marry, open, join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。假设要表达相应的意思，那么要改换动词 或时态，例如：工程已开始三个月了。The project has been started for three months.

10、(F)The project has been on for three months. (T)3 .带有复合宾语的动词变为被动语态时，假设宾语补足语为省略t。的不定式充当时，在被 动语态中需将省掉的t。加上。The boss has made his company offer more chances for people to work. 一His company has been made to offer more chances for people to work.(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 problem has been looked into.据说已经调查了这个问题。