资源简介

(共27张PPT)
Unit 3
Discovering Useful Structure
Present Perfect Passive Voice
现在完成时：
have/has done
1.过去的动作一直持续到现在
I have lived in China for 5 years.
我在中国住了5年。（从5年前到现在，现在还在中国）
2.过去的动作对现在产生影响
Someone has broken the window. (窗户现在是坏的)
I have already lost the key. (我现在没有钥匙)
I haven't read the book yet. (不了解书的内容)
现在完成时
主动： 被动：
1) 动作或状态从过去开始,一直持续到现在, 常与下列时间状语连用: so far, up to now, up till now, by now, recently, lately, in recent years; (ever) since+一般过去时, in / during / over the past / last... years/months/days/weeks, over the years
1.His first novel has received good reviews since it came out last month.
2) 动作或状态发生在过去,但对现在有影响或结果
2.I got caught in the rain and my suit has been damaged.
have/has done
have/has been done
现在完成时
主动： 被动：
3) 固定句型:It / This / That is the first (second, third…) time that… +现在完成时，表示“第几次做某事”
3.This is the first time we have seen a film in the cinema together as a family.
have/has done
have/has been done
What is present perfect tense
present(now)
future
past
现在完成时
have/has done（过去分词）
表示说话时已经完成的动作，而且这个动作的结果对现在仍有影响; 表示动作发生在过去，但一直持续到现在，并且有可能继续持续下去。
练习
1.Every means ______(try) to protect pandas over the past 10 years.
2.Many kinds of apps ______(create) to attract young people to play games so far.
3.Many words _____(add) to the language since it was published.
has been tried
have been created
have been added
肯定式： have/has been done...
否定式： have/has not been done...
一般问句： Have/Has+主语+been done
特殊疑问句： 疑问词+have/has+主语+been done
现在完成被动语态的基本结构
The singer has been invited (by Tom) .
The singer has not been invited (by Tom) .
Has the singer been invited (by Tom)
Who has been invited (by Tom)
否定
一般疑问
对宾语提问
Tall buildings__________________(build) everywhere.
have been built
Shopping centers ___ (rebuild).
have been rebuilt
More than 50 new factories __ (set up) to improve economies so far.
have been set up
The road ___________________(widen).
has been widened
More dustbins ___ ( place) on the streets.
have been placed
More and more trees and flowers _____
( plant) on the either side of the roads.
have been planted
注意事项
1.不及物动词和不及物动词短语，没有被动语态，如：rise , happen, take place, break out, come about, survive, remaind, last, die, disappear, end, fail, belong to, consist of...
Eg：Great changes have taken place in my hometown recently.
Eg: After the traffic accident, no one survived except
a person who was badly injured.
注意事项
2.一般说来，只有及物动词才有被动语态，但许多“不及物动词+副词或介词”构成的短语动词，相当于及物动词，也可以有被动语态，但变被动语态后，不可把介词或副词漏掉, eg : laugh at, listen to , look after, take care of, think of , talk about , hand in, catch sight of, make use of, pay attention to, turn on…
Eg.: My sister will be taken care of by grandma.
The patient is being operated on now.
He turned on the radio just now.
The radio was turned on by him just now.
[即时演练2]——单句语法填空/补全句子
(1)Great changes _______________(take) place in my hometown and you can see that a lot of factories __________________(set) up.
(2)Some efforts _______________(make) to improve the air quality in the city last winter.
(3)Over the past three years, the paintings _______________(take) to more than 20 museums in the world.
have taken
have been set
were made
have been taken
(4)For centuries, the ancient language _______________________(pass) on from one generation to another.
(5)The patient ___________________________
(被照顾得很好) ever since he came to our hospital.
has been passed
has been taken good care of
Ⅱ.语法与写作
1．自从他来帮我，我在学业方面已经取得了巨大进步。
Great progress ______________________________since he came to my help.
2．这是我第一次受到同学们的取笑。
It is the first time that I ______________________________________．
3．迄今为止，已经采取了有效措施来保护濒危动物免遭灭绝。
So far，effective measures __________________________________________________________．
has been made in my studies
have been made fun of by my classmates
have been made to protect endangered creatures from dying out
4．虽然我们不知道讨论了什么，但是我们可以感觉到主题已经被改变了。
Though we don't know what was discussed, we can feel the topic ________________yet.
5．空气、噪音和水污染已经极大地影响了人们的健康。
People's health ___________________________by air, noise and water pollution.
has been changed
has been greatly affected
Ⅲ.用所给动词的适当形式填空
Li Ming：Hi，Lin Tao. How nice to see you on the first day of the new term!
Lin Tao：Yes. Nice to see you again!
Li Ming：I know that your parents 1.____________________(work) in Yushu for years. Can you tell me something there after the earthquake
have been working
Lin Tao：Of course. Since the earthquake 2.______________(happen)，many soldiers 3.______________(send) there, and many kinds of supplies(物资供应) 4.__________________(carry) there from all over the country. Now, most people there 5.________________(live) a happy life again.
happened
have been sent
have been carried
live/are living
Li Ming：How about the schools there
Lin Tao：Several new schools 6.______________
(set) up and also some schools which7._______________(damage) in the earthquake 8.________________(rebuild)．So all the students can go back to school to study now.
Li Ming：That's wonderful. I'm sure their life will be better and better. When will your parents come back
Lin Tao：They will be back next month.
have been set
were damaged
have been rebuilt
Change the sentences into the present perfect passive voice.
译:把句子转换成现在完成时的被动语态
They’ve built a kind of new PC with more functions.
A kind of new PC has been built with more functions.
EXAMPLE
↓
I have downloaded the software to help my phone battery last longer.
Someone has lost an identity card.
The software has been downloaded to help my phone battery last longer.
An identity card has been lost.
Have you confirmed the Wi-Fi password
Have you pressed the button yet to copy the file
Has anyone made a comment about the online database
Has the Wi-Fi password been confirmed
Has the button been pressed yet to copy the file
Has a/any comment been made about the online database

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