人教版 (2019)必修 第二册Unit 3 The internet教案

这是一份人教版 (2019)必修 第二册Unit 3 The internet教案，共3页。教案主要包含了基本结构，主要用法，注意等内容，欢迎下载使用。

教学设计
Teaching Objects:
(1) Knwledge Objects:
a) Students will learn sme wrds and phrases
b) Students will master the the structure f the present perfect passive vice thrugh self-study and practice
(2)Ability Objective:
Students can use the structure f the present perfect passive vice t express their ideas.
(3)Emtinal Objectives:
Students can fster the interest and desire f learning English grammar.
Key and difficult pints:
Key pint: Help students identify the structure f the present perfect passive vice.
Difficult pints: Hw t use the structure f the present perfect passive vice in real situatin
Majr steps:
Step 1 Presentatin
Read the pairs f sentences.Underline and cmpare the different verb frms.
1.Jan's life has been greatly imprved by the Internet.
The Internet has greatly imprved Jan's life.
2.Much has been written abut the wnders f the Wrld Wide Web.
Peple have written much abut the wnders f the Wrld Wide Web.
现在完成时的被动语态
一、基本结构：
have/has been +及物动词过去分词
二.现在完成时的被动语态的形式：
(1)肯定式：主语+ have/has+ been+及物动词的过去分词+其他。
The car has been repaired. 这辆汽车已经被修理过了。
(2)否定式：主语+ have/has+ nt+ been+及物动词的过去分词+其他。
The huse hasn’t been cleaned fr a lng time. 这所房子很久没有打扫了。
(3)一般疑问式：Have/Has+主语+been+及物动词的过去分词+其他?
Has my letter been received? 你收到我的信了吗？
(4)特殊疑问式：特殊疑问词+have/has+主语+been+及物动词的过去分词+其他? Hw lng has the car been used? 这辆汽车用了多长时间了？
三、主要用法：
1. 表示发生在过去的动作对现在产生的影响或结果，这个动作是被动的。当动词为短暂性动词的时候，可与already或yet连用，但不能与fr或since引导的表示一段时间的状语连用。
This nvel has been translated int several languages.
2. 还可以表示在过去发生的，已知延续到现在的并可能持续延续下去的被动动作或状态。常与fr或since引导的时间状语连用，或用于“Hw lng…？”句型中。
The machine has been used fr 3 years.
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，即用现在完成时态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 hmewrk has been finished.
四、注意：
1）现在完成时的被动语态的两个助动词：have/has和been 缺一不可。
2）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表示一个被动的动作发生在过去，其结果对现在没有影响；而现在完成时的被动语态的动作或状态尽管发生在过去，但侧重说明该动作或状态对想在造成的影响或结果。 The machine has been repaired.
(说明动作发生在过去，对现在有影响，“修好了”)
The machine was repaired yesterday. (只说明动作发生在昨天)
3）不可与确定的表示过去或将来的时间状语连用（如yesterday, three days ag, in 1970,in 2050等），但可与不确定的时间状语连用（如 already，yet，just，ften，recently，in the past few years等）
They have been punished recently.
4）有些动词像finish，buy，start，begin，return，jin，marry，pen，die等，表示的动作很短暂，我们称之为短暂性动词或非延续性动词。它们构成的现在完成时的被动语态不能够与fr构成的短语，since构成的短语或引导的句子连用，也不能用于Hw lng…?句型中。
Step 2 Practice
Students finish the exercise n page 18.Teacher will ask them t check the right answer n PPT.
Step 3 Prductin
Grup task: Students will be divided in t several grups. Then share the results with whle class. Students are encuraged t use the grammar when talking.
（Justificatin: Students will learn t use the grammar in a prper way thrugh thse activities.）
Step 4 Summary and hmewrk
1. Summary
Students shuld act as an assistant t cnclude what they have learned in this class, and then the teacher will make a summary tgether with students.
(Justificatin: Reviewing the imprtant knwledge in this lessn can deepen students' impressin and frm gd study habits)
2. Hmewrk
Finish the exercise in PPT.
(Justificatin: Retelling can help students srt ut the curse cntent, and the exercise can help students master the grammar better.)