人教版（2019）选择性必修 第一册Unit 5 Working the Land Revision 课件 (30张ppt)

(共30张PPT)
Unit 5 Working the land
Review the whole unit
1
Learn the use of subject clause.
Master the new words in the whole unit.
2
Goals
overcome vt. 克服；解决；战胜
教材原句
Yuan overcame enormous technical difficulties to develop the first hybrid rice.
要点必记
overcome problems 解决问题
overcome oneself 战胜自己
overcome despair 摆脱绝望
核心词汇
alternative n. 可供选择的事物；adj. 可供替代的
教材原句
As an alternative, some farmers have switched to organic farming.
要点必记
alternative method 替代的方法
alternative approach 变换方法
have no alternative but v. 别无选择；只得；唯一的办法是
generate vt. 产生；引起
教材原句
It is estimated that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan’s hybrid strains.
要点必记
generate electricity 发电
generate profit 产生利润
generate strategy 制定策略
extension n. 扩大；扩建部分
教材原句
That were intended to one day become an extension of London Underground.
要点必记
vt. extend 延伸；扩大；推广；伸出；给予；使竭尽全力
adj. extensive 广泛的；大量的 extended 延伸的；扩大的；长期的
extendable 可延长的；可展开的；可扩张的
adv. extensively 广阔地；广大地
n. extensiveness 延伸；大范围
instance n. 现实；事实
教材原句
For instance, they may grow corn or wheat in a field one year.
要点必记
for instance 例如（for example; such as）
in this instance 在此情况下
at the instance of 在…的请求下；经…的提议；因…的主张
depth 轮流；依次
教材原句
Organic farmers also plan diverse crops that use different depths of soil to help keep it rich.
要点必记
in depth 深入地；全面地
in the depth of 在……里面
long—length wide—width high—height deep—depth
alleviate n. 现实；事实
教材原句
What can people and countries do to help alleviate these causes
例句
1. Nowadays, a great deal can be done to alleviate back pain.
如今，很多方法可以被用来减轻背部疼痛。
2. Their energies were focused on the alleviation of the refugees' misery.
他们把精力集中在了对难民苦难的减轻上。
in turn 轮流；依次
教材原句
This affects the crops grown on the land, in turn, the animals and humans who digest them.
要点必记
take turns to do sth 轮流做某事
by turns 轮流
in return 作为回报
in return for 作为对…的回报
devote vt. 把…献给； 专心于
教材原句
Indeed, his slim but strong body is just like that of millions of Chinese farmers, to whom he has devoted his life.
例句
1. Considerable resources have been devoted to proving him a liar.
为了证明他是个骗子已投入了相当多的人力和财力。
2. After her marriage, she couldn't devote herself totally to her music.
她结婚之后无法全力倾注于音乐。
【拓展】
devote…to (doing) sth. 把…致力于；专心于
devote oneself to (doing) sth. 献身于；致力于

devoted adj. 挚爱的；忠实的，忠诚的
be devoted to 致力于

devotion n. 奉献；关照；忠诚
shortage n. 缺少；不足
教材原句
Farmers often had poor harvest and sometimes even had a serious shortage of food to eat.
要点必记
shortage of 缺少……
water shortage 缺水；水量不足；枯水
food shortage 粮食短缺
power shortage 电力短缺
fund shortage 资金不足， 资金短缺
digest v. 消化；领会
教材原句
This affects the crops grown on the land, in turn, the animals and humans who digest them.
例句展示
I have had time to digest what happened Sunday night and what it means to me.
我需要一些时间来消化周日晚上发生了什么，它对我而言意味着什么。
要点必记
adj. digestive 消化的；助消化的 digestible 易消化的；可摘要的
n. digestion 消化；领悟
convince v. 使相信；使确信；信服
教材原句
Yuan was convinced that the answer could be found in the creation of hybrid rice.
要点必记
adj. convinced 确信的；深信的 convincing 令人信服的；有说服力的
convince sb. to do sth. 说服某人做某事
convince sb. of sth. 使某人相信某事
be convinced of …相信…
Read and complete the passage with the correct forms of the words and phrases in the box. Then answer the questions.
attain be comprised of depth diverse
essential for instance output soil
Jia Sixie was a government official from Shandong Province who conducted a lot of agricultural research in the sixth century. In his travels, he observed that some farmers had much better _________ than others, so he decided to investigate the best ways of ___________ good harvests. After retiring, he wrote a book Qi Min Yao Shu, which ______________ sound advice and practices for people doing agriculture work.
output
attaining
is comprised of
In one piece of advice,_________________, he told fanners to clear weeds from the ground before planting crops. They could either let the animals eat the weeds or turn the
_________over so that the weeds were covered. Then he gave advice on ploughing, suggesting
that the autumn ploughing should be at a greater _________ than the spring ploughing. He also
suggested changing crops to get better harvests every year. Finally, he suggested that farmers grow a __________ range of crops next to each other in the fields. Although has been centuries since Jia Sixie died, Q Min Yao Shu is still considered a(n)_______________book in China’s agricultural history.
for instance
soil
diverse
essential
depth
it is +done +that 从句
教材原句
It is estimated that about 60 percent of domestic rice consumption is in china.
要点必记
it is +adj +that 从句 It is important to get along well with others.
it is + n. +that 从句 It is a pity that he can not come to my birthday party.
it is +done+that 从句 It is reported that the park has received one million visitors.
核心句式：
现在完成进行时
结构：have/ has been doing sth.
意义： 表示到现在为止已经完成，并且还会继续下去
例句：He has been working as a doctor since he left school.
(做医生这份工作会一直进行下去，不会到现在为止结束)
核心句式：
和现在完成时的区别：
have/ has done: 到现在为止已经完成，不会再继续
He has finished his homework. (作业已经完成，不会再进行下去了)
not only…but also
要点必记
1. not only…but also就近原则
连接两个主语时，要和与其最近的主语保持人称和数的一致。
如：
Not only Tom but also Alice and Mary are busy.
不仅汤姆很忙，爱丽丝和玛丽也很忙
核心句式：
为了强调，可将not only置于句首，其后的句子通常要用部分倒装的形式。
如:
Not only has she been late three times, she has also done no work.
她不仅仅迟到了3次，她还没干一点活。
as well as
要点必记
当 as well as 连接两个成分作主语时, 其后的谓语通常要与前面一个主语保持一致。
如：
E.g. Tom as well as his parents is going to London. 汤姆和他的父母要去伦敦。
The captain, as well as the other players was tired. 队长和其他队员都累了。
核心句式:
相似用法
with; together with; along with; besides; but; except; including; rather than
E.g. Everyone including Mary and Tom is here.
主语从句
一、概念与类型
主语从句在复合句中作主句的主语。
例如:
1. That she was chosen made us very happy. 她当选了使我们很高兴。
2. What caused the accident is a complete mystery.
是什么导致了这次事故还完全是一个谜。
3. Whether she will come or not is still a question. 她是否来还是一个问题。
核心句式：
为了使句子结构平衡，避免“头重脚轻”，常用it作形式主语，而把从句放在后面。
例如:
1. It is a pity that she has made such a mistake.
她犯了这样一个错误，真是遗憾。
2. It depends on the climate whether they are going shopping today.
他们是否今天去购物还得看天气。
Fill in the blanks with that, whether, or wh- question words.
1 _________the research centre is to be set up has not been decided.
2 _________many countries still face food shortages remains a big problem.
3 _________impressed me most was that the hybrid rice enabled farmers to expand their output greatly.
4 __________the plan is to be carried out still needs discussing.
5 __________the new chemical pesticide is effective remains to be seen.
Where
That
What
When
Whether
6 ________will join in the research team will be announced tomorrow.
7 ________he quit his high-paying job is not difficult to understand. He wanted to start up his own business.
That
Who
1
Recite new words and phrases.
2
Write an argumentative article about organic farming.
THANKS