高考英语-概要写作--公开课课件.pptx

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1、12022-5-9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 climate will prob

2、ably 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 farming region

3、s 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 the bad weathe

4、r 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 it another w

5、ay, 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 century might l

6、ive 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 in half,” sa

7、id Seth Cook, a British environmental scientist, “we could feed an extra billion people.”22022-5-93. 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 structures.

8、Concise ! 60-70 words32022-5-9Step 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

9、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 reached by some scientists.42022-5-9Para. 1: Feeding the worlds population is a big c

10、hallenge, 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 probably make feeding this far greater number a very frightening task. That is

11、the conclusion reached by some scientists. 52022-5-9Para. 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

12、changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. 62022-5-9Para. 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 th

13、e 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 reached by some scientists. 72022-5-9Para. 2: Just three cropswheat, rice and cornp

14、rovide more than two-thirds of the calories 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 ar

15、e easily affected by bad weather. Events 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.82022-5-9Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the c

16、alories 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. Ev

17、ents 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.92022-5-9Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such cr

18、ops, 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 such as widespread flooding or

19、extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.102022-5-9Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage

20、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, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about on

21、ce 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.112022-5-9Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That mea

22、ns 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, as the climate warms, high and low temperatures become more extreme, and by 2050, food shoc

23、ks 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.122022-5-9Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a

24、 “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, as the climate warms, high and low temperatures become more extreme,

25、 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.132022-5-9Para. 4: So what can people do to help avoid food shocks? Making agriculture efficie

26、nt 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 in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”142022-5-9Para. 4: So what can people do to help avoi

27、d 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 in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”152022-5-9Pa

28、ra. 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 down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could f

29、eed an extra billion people.”162022-5-9Step 2: Rewrite the key information in our own words Tip 1: Rewrite at the sentence level Tip 2: Rewrite at the word level172022-5-9Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger._ (change the compound sentence并列句 into

30、one simple sentence简单句 )_ (change the subject) Feeding the worlds population is a _ _ _ challenge._ is a bigger and bigger challenge to feed the worlds population.bigger andbiggerIt182022-5-9_ (change the word “worlds”)_ (change the phrase “a bigger and bigger challenge”) Para. 1: It is a bigger and

31、 bigger challenge to feed the worlds population.It is a bigger and bigger challenge to feed theglobal population.It is _ _ _ _ to feed theglobal population.challenging more and more 192022-5-9Para. 1: It is more and more challenging to feed the _ global population. (add an adjective)Para. 1: Feeding

32、 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 probably make feeding this far greater number

33、a very frightening task. That is the conclusion reached by some scientists.increasinggrowing202022-5-9Para. 2: crops, breadbaskets, These areas often occupy a relatively small portion of the globe._ (simplify the sentence)_ (use “many crops” as the subject) Breadbaskets are often _.Many crops _ _ _

34、on _ breadbaskets.limitedare often grown limited 212022-5-9Para. 2: The breadbaskets are easily affected by bad weather._ (change the word “affect”) Breadbaskets are easily _ /_by bad weather.Many crops are often grown on limited breadbaskets. (combine the two sentences)Para. 2: Many crops are often

35、 grown on limited breadbaskets _ are easily impacted by bad weather.that/ whichinfluenced impacted222022-5-9Para. 3: big crop failures, could lead to, a “food shock” That means an overall shortage of food would occur._ (put the key phrases into one sentence)_ (combine the two sentences) Big crop fai

36、lures 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, _ a “food shock”.called232022-5-9Para. 3:Big crop failures could lead to an overall shortage of food, called a

37、“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/242022-5-9Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That mea

38、ns 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, as the climate warms, high and low temperatures become more extreme, and by 2050, food shoc

39、ks 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 occur more _in the future. (use one adverb)frequently/often252022-5-9Para. 3:Big crop failu

40、res 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 “food shock”, _ could occur more frequently in the future.which262022-5-9Para. 4:Mak

41、ing 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 most effective ways to fight against food shocks.(change the phrase “cut

42、down on”) Reducing food waste272022-5-9Para. 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 food shocks by _ _ and _ _ _.makingagriculture efficientredu

43、cing food waste282022-5-9Para. 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 and reducing food waste.prevented292022-5-9Step 3: a

44、dd 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 overall shortage of food, called a “food shoc

45、k”, 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, 302022-5-9It is more and more challenging to feed the growing global population.

46、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)312022-5-9