资源简介

(共25张PPT)
UNIT 3　
Fascinating Parks
Discovering Useful Structures
01
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Have you ever seen these signs
Smoking/ Littering/ Spitting is prohibited/banned.
01
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功能 句子
I wake up to the sound of the wind the cloth of my tent.
Close by, there are a few reindeer on grass.
Even though the sun is brightly shining, whether it is morning or night is impossible.
here is quite difficult, so apart from the Sami very few people have ever seen Sarek.
For hundreds of years, after reindeer was a way of life for the Sami.
in such a beautiful and wild place makes me feel blessed to be alive.
before me, branches of the Rapa River flow through the valley below.
Around 9,000 years ago, this ice melted, about 100 glaciers.
But every spring, a small number of Sami still follow their reindeer into the valleys of Sarek, in tents or old cottages and their traditions.
Here I am, alone under this broad sky, the fresh air, and this great adventure.
For example, this morning my breakfast is flat bread warmed over a fire, dried reindeer meat, and some sweet and sour berries that I found near my tent.
作定语
作主语
作状语
作宾补
buffeting
telling
Getting
looking
Spreading out
leaving behind
living
enjoying
breathing
enjoying
growing
feeding
Being
1. 动词-ing形式作主语，表示一般或抽象的习惯性行为，谓语动词用______。
eg. Reading aloud ____very important for us to learn a foreign language.
Going to bed early and getting up early ___ considered to be a good habit.
单数
is
is
2. 有时为了句子平衡，避免头重脚轻, 用
it作形式主语，而把真正的主语(动词-ing
短语)后置。常见的固定句型有：
动词-ing形式作主语
It + be + a waste of time doing …
做……是浪费时间的
It is/was no good/use/fun doing …
做……是没益/用处/意思的
It is/was useless/worthwhile doing …
做……是没用/值得的
2. 有时为了句子平衡，避免头重脚轻, 用
it作形式主语，而把真正的主语(动词-ing
短语)后置。常见的固定句型有：
2. 有时为了句子平衡，避免头重脚轻, 用
it作形式主语，而把真正的主语(动词-ing
短语)后置。常见的固定句型有：
动词-ing形式作主语
注意：动名词作主语用it 充当形式主语的情况很少，上表中是最常见的句式结构。不定式作主语时，常用it 充当形式主语，如：
It’s not easy to learn a foreign language well.
学好一门外语不容易。
It’s difficult for us to finish the work in a week.
对我们来说，一周之内完成这项工作很困难。
2. 有时为了句子平衡，避免头重脚轻, 用
it作形式主语，而把真正的主语(动词-ing
短语)后置。常见的固定句型有：
动词-ing形式作主语
It is no use/no good ________ (cry) over split milk .
It is a waste of time _____________ (persuade) such a person to join us.
crying
persuading
动词-ing形式作主语
3. 动词-ing的复合结构作主语时，通常有两种
形式：
(1) 形容词性物主代词+动词-ing
(2) 名词所有格+动词-ing
_____________________ made his teacher very angry.
他再次迟到让老师很生气。
_____________________is a great help to his family. 麦克回来工作对他全家来说都是一大帮助。
His being late again
Mike’s returning to work
动词-ing形式作主语
4. 动词-ing与动词不定式作主语的区别：
动词-ing作主语，常常表示抽象的习惯性
或经常性的动作。 而不定式一般表示一次性、
具体性的行为。
Delivering newspapers is his job. 送报纸是他的
工作。
To deliver newspapers is his job today. 送报纸是
他今天的工作。
动词-ing形式作主语
当句型“There is no...”表示“不允许、禁止某种行为的发生或存在”时，需用动名词作主语。
There is no denying that the environment is from bad to worse.
不能否认环境状况正在逐步恶化。
There is no joking about such matters.
这种事开不得玩笑。
动词-ing形式作主语总结
表示经常性或习惯性的动作且常
放句首
形容词性物主代词+动词-ing
名词所有格+动词-ing
动词-ing
作 主 语
It’s a waste time doing sth
It’s useless/no use/no good doing sth
It’s no fun doing sth
it 作形
式主语
动词原形+-ing
达标检测
2 Rewrite each of the following sentences using the -ing form as the subject.
Example
It is challenging yet really fascinating to hike through the mountains in the pathless Sarek.
To hike through the mountains in the pathless Sarek is challenging yet really fascinating.
Hiking through the mountains in the pathless Sarek is challenging yet really fascinating.
How does the sentence focus change
The use of -ing forms as subjects puts the action first, making the sentences seem more dynamic.
2 Rewrite each of the following sentences using the -ing form as the subject.
1) It is both challenging and rewarding to study abroad.
To study abroad is both challenging and rewarding.
Studying abroad is both challenging and rewarding.
2) It would hardly be possible to go on a hiking tour in Sarek in winter due to the extreme cold.
To go on a hiking tour in Sarek in winter would hardly be possible due to the extreme cold.
Going on a hiking tour in Sarek in winter would hardly be possible due to the extreme cold.
3) Honestly, it can be both exciting and terrifying to explore a vast unknown land.
Honestly, to explore a vast unknown land can be both exciting and terrifying.
Honestly, exploring a vast unknown land can be both exciting and terrifying.
4) It is good to adopt a positive attitude, even when things are difficult.
To adopt a positive attitude is good, even when things are difficult.
Adopting a positive attitude is good, even when things are difficult.
How does the sentence focus change
The use of -ing forms as subjects puts the action first, making the sentences seem more dynamic.
it 作形式主语与动词ing形式作主语的区别？
▲it 做形式主语、不定式后置时，句子侧重表语部分，强调行为的特征、状态和给人的感受；
▲动词ing形式作主语时句子侧重于主语，强调行为本身的具体内容，使句子更加生动。
3. Fill in each blank using the -ing form of a verb from the box and state its function. One word will be used twice.
combine/ cover/ grow/ take /limit /walk /experience
Xixi National Wetland Park,_____________10 square kilometres in western Hangzhou, is the first national wetland park in China.____________ city life, nature, and wetlands makes the park a popular destination both for tourists and local residents. At Xixi, ___________a boat tour, ___________ along paths, and ___________ local customs and traditions of the villages in this park are at the top of the list of people's favourite activities. With trees, bushes, and colourful flowers ____________ along the
covering
Combining
taking
walking
experiencing
growing
beauty in different seasons. In order to better develop as well as preserve this place,_________ human impact on Xixi Wetland was considered by the park designers. All the new buildings were designed in a traditional way to fit into the natural environment. This green, watery world is home to many birds and fishes. With trees __________in the shallows, the wetland is a natural system for providing clean water and producing oxygen, which makes it the “green lungs of Hangzhou" .
limiting
growing
Ⅰ.单句语法填空
1.It is no use (advocate) such a life in a remote village.
2.His (not，get) to the station on time made everyone worried.
3.Be careful！ (play) with fire near the wood will be dangerous.
4.It is acknowledged that swimming (be) a good sport in summer.
5.It is a waste of time (try) to persuade him to give up computer games.
6.It is necessary for us students (help) each other in trouble.
advocating
not getting
Playing
is
trying
to help
Ⅱ.完成句子
7. on the beach.
在海边度假很有趣。
8. caused so much trouble.
汤姆这么粗心，惹来了不少麻烦。
9. for that young man is really great fun.
对那个年轻人来说写英文小说很有趣。
Tom’s being so careless
Writing English novels
It’s fun spending the holiday
10.Since then， has been his life goal.
从那时起，寻找方法生产更多的水稻是他的人生目标。
11. made him late for class.
他早上起晚了，导致他上课迟到了。
finding ways to grow more rice
His getting up late in the morning
Ⅲ.用所给动词的适当形式完成下面的短文
Tom spent most of his time searching for information on the Internet each day，which made his parents worried.In his father’s opinion,12. (sit) in front of a computer did great harm to his son’s health.However，he found that it was no use 13._________
(advise) Tom to spend less time on the Internet，for he wouldn’t listen.Tom told his parents that that was what his job required.His mother wanted him to change his job，but Tom said that he was fond of it and 14. (stay) up late had become his habit.There was no way，otherwise he wouldn’t finish his task on time.
sitting
advising
staying
In my opinion，it is not wise to spend too much time on the Internet.15. (have) a rest regularly will be of great help while working at the computer.In addition,16. (set) aside some time to relax is also very important.
Having
setting

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