(共24张PPT)
Nurturing nature
Book 4 Unit 6
Grammar
Present perfect continuous
Which of these statements is true about sentence (a)
Wild animals started using these passages in the past.
Wild animals used these passages only once.
Wild animals still use these passages now.
Activity 1
Look at the sentences from the reading passage and answer the questions.
Activity 1
Look at the sentences from the reading passage and answer the questions.
They are different in form and meaning. For sentence (a) the form is “have been doing” , while for sentence (b) the form is “have done”. In meaning, the bold part in sentence (a) means the action is continuous from the past; while the bold part in sentence (b) means the action happened once in the past.
2. What is the difference between the expressions in bold in sentences (a) and (b)
现在完成进行时:概念界定
肯定:have / has been doing
否定:haven’t/hasn’t been doing
现在完成进行时表示动作从过去某一时间开始一直持续到现在,这个动作可能终止,也可能还在进行。
1. 现在完成进行时的形式
2. 现在完成时的形式的概念
现在完成进行时:用法探究
完成《学案》p.101【一、语法梳理】【二、语法练习】
比较have been doing 和have done的区别
总结常与现在完成进行时连用的时间状语
总结不用于现在完成进行时的情况
1)在不用时间状语的情况下,have been doing的动作不一定已经完成(即强调延续), 而have done一般表示动作已经完成(即强调结果)。
例句分析:
③ He has been writing a novel, which will be finished next month.
他在写一本小说,下个月能写完。
④ He has written a novel, which is being prepared to come out now.
他写了一本小说,正准备出版。
现在完成进行时
3. 现在完成进行时与现在完成时的区别
2)have been doing往往表示动作在重复,而have done一般不表示动作的重复。
例句分析:
⑤ I have been visiting my hometown recently, and it impresses
me differently each time.
最近我总回老家,每次感觉都不一样。
⑥ I have visited my hometown recently, whose changes have
left a deep impression on me.
最近我回了趟老家,那里巨大的变化让我惊讶。
现在完成进行时
3. 现在完成进行时与现在完成时的区别
3)have been doing与所有进行时态一样带有感彩,可使表达显得生动;而现在完成时往往只表明一个事实、一种影响或结果,不带感彩。
例如:
⑦Recently he has always been helping me.
最近他总帮我(感激 )。
⑧Recently he has helped me a lot.
最近他帮了我很多(客观陈述)。
现在完成进行时
3. 现在完成进行时与现在完成时的区别
现在完成进行时常与表示一段时间的状语连用,例如:all the time, this week, all night, these few days, for … , since … 等。
翻译:
a. A private detective has been tailing him for several weeks.
一个私人侦探几个星期以来一直在跟踪他。
b. Craig loves outdoor activities — he skis in winter and has been fishing and hunting since he was a child.
Craig 热爱户外活动。冬天他去滑雪,他从小就开始钓鱼和打猎。
现在完成进行时
4. 常与现在完成进行时连用的时间状语
1)状态动词一般只用于have done,而不用于现在完成进行时。
I have already had a new cellphone.
I have known him for ages.
I have been ill.
2)现在完成时无被动形式。
We have been repairing the car. √
The car has been being repaired. X
现在完成进行时
5. 不用于现在完成进行时的状况
Practice: Activity 2 (教材p.65)
1. have been hearing
2. has been making
3. is moving
4. have been flying
5. have been given
6. have been using
Practice: Activity 3 (教材p.65)
Look at the charts and make sentences using the present perfect continuous tense.
1. The number of trees has been increasing in the last 20 years.
2. Desert areas have been reducing in the last 20 years.
3. Butterfly population has been increasing / has been becoming larger and larger in the last 20 years.
Work in pairs. Talk about how the environment where you life has changed. Use the present perfect continuous tense where appropriate.
Practice: Activity 4 (教材p.65)
Practice: 《语法通》p.116即学即用10
答案:
has made/will make
have been taking; believe
have been waiting
have been ringing
have been cooking; have made; am cooking
am; have been painting
has been writing
will win; agree; has been preparing
have been looking
has been playing
Tourism and the environment
Read the paragraph and answer the questions:
What is ecotourism
Ecotourism is a type of tourism that conserves the environment, encourages people to be responsible travellers and involves educating them about the natural world.
2. Which countries value ecotourism
Costa Rica, Kenya and Nepal.
3. What are typical voluntary work for ecotourism holidays
Planting trees and counting endangered animals.
Did you know
Listen to the conversation and choose the places mentioned.
Activity 5
Activity 6
Listen again and complete the notes.
Now work in pairs. Discuss what type of travel you prefer.
hard work
elephants
hike in the mountains
count
lie on the beach
a nice hotel
a one-day bike tour
Use the expressions from Activity 7 to reach an agreement on what to do during your ecotourism trip.
The fact is that ...
Wouldn’t you agree that ...
Let’s find a compromise.
Let’s meet in the middle.
As a compromise, …
I agree, but …
Speaking
birdwatching
caving洞穴探险
White Beach
White Beach is a beach on the island of Boracay(长滩岛) in the Philippines. Its white sand, which bends towards the turquoise(蓝绿色的) water, is dotted with palm trees. White Beach is of course a beautiful place to relax in a sun lounger and watch the spectacular sunset.
Background Information
Activity 8
Complete the passage with the expressions in the box.
1. create opportunities for new businesses
2. help the local economy
3. not eco-friendly
4. disturb the wildlife
5. provide more jobs
6. use up natural resources
7. higher carbon emissions
Activity 9
Complete the boxes with the expressions in Activity 8.
attracting more tourists
creating opportunities for new businesses
helping the local economy
providing more jobs for people living in the area
polluting inshore seawater
destroying local ecological environment
Advantages:
Disadvantages:
not eco-friendly
disturbing the wildlife
using up natural resources
higher carbon emissions
raising awareness of local wildlife
providing locals with a chance to experience other cultures
Add more advantages and disadvantages that you can think of.
Now work in pairs. Role-play a discussion to reach an agreement that is satisfactory for everyone. Use the expressions in this section.
Listening and speaking
Student A: You are a hotel operator who wants to build a hotel on some forested land.
Student B: You are a conservationist who wants to protect the wildlife there.