高考英语概要写作公开课.ppt课件.ppt

1、概要写作概要写作SummaryWriting阅读下面短文，根据其内容写一篇60词左右的内容概要。Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing clim

2、ate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from f

3、arming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if t

4、he bad weather occurs when a crop is young, fruiting or approaching harvest.Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put

5、 it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current ce

6、ntury might live through two or three extreme food shocks during their lifetime.So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste

7、 in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”3. add some transitional words to make the passage smooth. 1. Find out key information of each para. 2. Rewrite the key information Express the same meaning using your own words , phrases or structu

8、res.Concise ! 60-70 wordsStep 1: Careful reading for the key words, phrases or sentences in each paragraph Underline or circle the key informationPara. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the plane

9、t. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.Para. 1: Feeding the worlds population is a big challenge, and

10、it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion

11、 reached by some scientists. Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will p

12、robably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientis

13、ts estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calori

14、es that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events

15、such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a sma

16、ll number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat

17、wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from

18、 farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if

19、 the bad weather occurs when a crop is young, fruiting or approaching harvest.Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century

20、. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the

21、 current century might live through two or three extreme food shocks during their lifetime.Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen

22、every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the

23、middle of the current century might live through two or three extreme food shocks during their lifetime.Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks us

24、ed to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person

25、 born in the middle of the current century might live through two or three extreme food shocks during their lifetime.Para. 4: So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut d

26、own on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”Para. 4: So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight agains

27、t food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”Para. 4: So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most

28、 effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”Step 2: Rewrite the key information in our own words Tip 1: Rewrite at the sentence level

29、Tip 2: Rewrite at the word levelPara. 1: Feeding the worlds population is a big challenge, and it is about to get bigger._ (change the compound sentence并列句 into one simple sentence简单句 )_ (change the subject) Feeding the worlds population is a _ _ _ challenge._ is a bigger and bigger challenge to fee

30、d the worlds population.bigger andbiggerIt_ (change the word “worlds”)_ (change the phrase “a bigger and bigger challenge”) Para. 1: It is a bigger and bigger challenge to feed the worlds population.It is a bigger and bigger challenge to feed theglobal population.It is _ _ _ _ to feed theglobal popu

31、lation.challenging more and more Para. 1: It is more and more challenging to feed the _ global population. (add an adjective)Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scie

32、ntists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.increasinggrowingPara. 2: crops, breadbaskets, These areas often occupy a relatively

33、 small portion of the globe._ (simplify the sentence)_ (use “many crops” as the subject) Breadbaskets are often _.Many crops _ _ _ on _ breadbaskets.limitedare often grown limited Para. 2: The breadbaskets are easily affected by bad weather._ (change the word “affect”) Breadbaskets are easily _ /_by

34、 bad weather.Many crops are often grown on limited breadbaskets. (combine the two sentences)Para. 2: Many crops are often grown on limited breadbaskets _ are easily impacted by bad weather.that/ whichinfluenced impactedPara. 3: big crop failures, could lead to, a “food shock” That means an overall s

35、hortage of food would occur._ (put the key phrases into one sentence)_ (combine the two sentences) Big crop failures could lead to a “food shock”.Big crop failures could lead to a “food shock” _ means an overall shortage of food.that/whichBig crop failures could lead to an overall shortage of food,

36、_ a “food shock”.calledPara. 3:Big crop failures could lead to an overall shortage of food, called a “food shock”._ (change the phrase “lead to”)Big crop failures could cause an overall shortageof food, called a “food shock”.result in /contribute toaccount for/Para. 3: Unfortunately, big crop failur

37、es in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies,

38、as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.Para. 3:Food shocks could

39、occur more _in the future. (use one adverb)frequently/oftenPara. 3:Big crop failures could cause an overall shortageof food, called a “food shock”.Food shocks could occur more frequently in the future. (combine the two sentences)Big crop failures could cause an overall shortage of food, called a “fo

40、od shock”, _ could occur more frequently in the future.whichPara. 4:Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. _ (change the subject of the second sentence)Cutting down on food waste is one of the mo

41、st effective ways to fight against food shocks.(change the phrase “cut down on”) Reducing food wastePara. 4:Making agriculture efficient is one choice.Reducing food waste is one of the most effective ways to fight against food shocks. So what can people do to help avoid food shocks? People can avoid

42、 food shocks by _ _ and _ _ _.makingagriculture efficientreducing food wastePara. 4People can avoid food shocks by making agriculture efficient and reducing food waste._ (change the active voice into passive voice) (change the word “avoid”)Food shocks can be avoided by making agriculture efficient a

43、nd reducing food waste.preventedStep 3: add some transitional words to make the passage smooth.It is more and more challenging to feed the growing global population. _ many crops are often grown on limited breadbaskets which are easily impacted by bad weather. _ big crop failures could cause an over

44、all shortage of food, called a “food shock”, which could occur more frequently in the future. _ food shocks can be prevented by making agriculture efficient and reducing food waste.For one thing, For another, One reason is that Another reason is that However, It is more and more challenging to feed

45、the growing global population. For one thing, many crops are often grown on limited breadbaskets which are easily impacted by bad weather. For another, big crop failures could cause an overall shortage of food, called a “food shock”, which could occur more frequently in the future. However, food shocks can be prevented by making agriculture efficient and reducing food waste. (68 words)