人教版英语必修4 Unit 2 Working the land课文语言点课件

课件45张PPT。Unit2 Working the land
Language points for Reading I学科网1. Have you ever grown any plants? If so, what did you do to grow them?
If so=If you have ever grown some plants.
so 表示“象那样的，如前所说的”，用于代替已陈述的事。如：
-----can you pass the exam?
------I hope so.
1. If so...如果这样……,
(教材原句)If so，what did you do to grow them？
如果这样的话，你做了些什么来种植这些植物？
联想拓展
①if so意为“如果是这样的话”，是if引导的条件状语从句的省略形式，可以用来代替整个从句，省略前面出现过的主语和动词，表示肯定意义；如果表示否定意义，则用if not。
②由if，when构成的此类省略形式还有：
if necessary 如果有必要的话if any 如果有的话
if possible 如果可能的话
when necessary 当必要时
when possible 当可能时句型学与练学以致用①—Have you been to the Great Wall?
—Perhaps not in my memory.________，it might have been during my early childhood. (2013·淮北模拟)
A．If only B．If so C．If ever D．If not
②It sounds like something is wrong with the car's engine.________，we'd better take it to the garage immediately. (2011·江苏，33)
A．Otherwise B．If not C．But for that D．If so
③He is always thinking more of himself，seldom，________，offering to help others.
A．if never B．if ever
C．if possible D．if any完成句子
④下周你哪一个晚上有空，如果有空，我们去跳舞吧。
Have you got a free evening next week？__ __，let's go dancing.
⑤如果可能的话，我想要在最高层的房间。
____ ______，I want a room on the highest floor.
(1)有人感到冷吗？如果没有的话，我们把窗户打开吧。
Is anybody feeling cold? If not, let us open the windows.
(2)如果有的话指出句中的错误。
Point out the mistakes in the sentences, if any.
(3)如果必要的话，我将亲自去那儿一趟。
If necessary, I will go there myself.If soIf possible单项填空
(　　)(1)If you've finished, we can have a coffee. ______，you'd better keep working.
A. If so B. Only if C. If only D. If not
(　　)(2) The girl seldom, if ______， turned to her brother for protection.
A. never B. ever C. any D. then3. works the land
work vi./ vt. 经营,管理
work the land=grow crops on it 耕耘土地　
He works a big farm. 他经营着一个大的农场。学科网4. In many ways, he is one of them, and he has struggled for the past five decades to help them.
常与现在完成时连用的时间状语
(1) already, yet, ever, just, recently, lately, never, before (adv.)
The boy has already/just got home. I haven’t heard from him yet /recently /lately.
I have seen the old man somewhere before.(2) since/for
I have lived in Beijing since 2000.
I have lived in Beijing since I arrived here.
I have lived in Beijing for 5 years.7. Dr Yuan Longping grows what is called super hybrid rice. (Page 10)
袁隆平博士种植的是被称为“超级杂交水稻”的稻种。
句型分析：
该句为复合句，what引导宾语从句,且在从句中作主语。
what引导的名词性从句相当于名词的作用，可作主语、宾语,表语, 且what在从句中可用作主语、宾语或表语。
The question is what he wants to do next.
问题是下一步他想做什么。（表语从句；宾语）
What you need is patience.
你需要的是耐心。（主语从句；宾语）
Tell me what you would like to drink.
告诉我你想喝什么。（宾语从句；宾语）[即境活用]　
1). We now live in__________________(所谓的) the Information Age. (call)
2). The outcome of the incident is________________ (所谓的) “There is no story without coincidences.” (call)what is calledwhat is called(1) You can only be sure of _____you have at present; you can’t be sure of something _____ you might get in the future.
A. that; what B. what;/ C. which; that D. /; that
(2) Some children want to challenge themselves by learning a language different from ______ their parents speak at home.
what B. that C. which D. one
(3) A modern city has been set up in______ was a wasteland ten years ago.
A. what B. which C. that D. where
5. Dr Yuan Longping grows what is called super hybrid rice.e.g. I don’t quite understand what you are explaining. Please watch what I am doing carefully.2) What =the thing(s) that1) Super 特级，超级____ the emperor saw was quite different from _____ the old minister told him.
A. What, that B. That, what
C. Which, that D. All, all It is pretty well understood _______ controls the flow of carbon dioxide in and out the atmosphere today.
A. that B. when
C. what D. how 学科网6. This special strain of rice makes it possible to produce one-third more of the crop in the same fields.it 在句中作形式宾语, 真正的宾语为to produce…, 结构为: 动词(make, feel, think, regard…)+it +adj+ to do.e.g. We think it important to learn English well.I like ____ in the autumn when the whether is clear and bright.
A. This B. that C. it D. one.7. output 产量8. This special strain of rice makes it possible to produce 20%more of the crop in the same fields.
make it +宾语补足语+动词不定式,it 做形式宾语,动词不定式是真正的宾语。it做形式宾语, 通常和下列动词连用: We consider it our duty to support good leaders.
consider, think, make, find, believe, count, declare, deem, fancy, feel, guess, imagine, judge, prove, see, show, suppose, understand, take等.The new method makes it possible to complete the task faster.Tom found it very embarrassing to be reminded of the long-standing debt.
Susan deemed it advisable to keep the matter secret.
We all feel it nice to be able to visit that distinguished university.Who can prove it wrong to have a “make-money-quick” mentality?
The guide thought ___ wrong to eat monkeys. A. this B. it is C. it D. that was9. Dr Yuan searched for a way to increase rice harvest without expanding the area of fields.
▲ search = try to find by looking for “搜查”。They searched everywhere but could not find the lost child. 他们各处都找遍了, 始终找不到丢失的小孩。
The home was searched but no one was found. 搜查了房屋但一个人也未发现。▲ search常用的搭配：
　 search sb./sth. 搜查某人/某物
search for sb./sth. 搜寻某人/某物
search sth./sb. for…搜查某物/某人以寻找……
in search of 寻找
search out 发现注意：
search sb.指“搜查某人”, 指对某人进行搜身。
search for sb.指“搜寻某人”, 指为了要找到某人进行搜寻, 相当于look for。例如：The policeman searched the thief to see what he had in his pockets. 警察搜查小偷, 看他口袋里有什么东西。
The villagers are searching for the missing child. 村民们正在搜寻那个失踪的孩子。2) rid…of … 使…摆脱/清除…
rid a house of mice 清除室内老鼠
rid oneself of debt 还清债务
[类似用法动词]：
inform/ warn/ cure…of…,
The sales manager asked his men to inform him of everything concerning the sales in time. 销售部经理让他手下的人把关于销售量的情况及时报告他。11. Using his hybrid rice, farmers are producing harvests twice as large as before.
英语中的倍数表达法共有三种形式:
(1) 倍数 + 形容词/副词的比较级 + than...
(2) 倍数 + as +形容词/副词的原级 + as...　(3) 倍数 + the + 名词+ of...
This building is five times higher than that one. 这座楼比那座楼高出五倍。
This building is five times as high as that one. 这座楼是那座楼的五倍高。This building is five times the height of that one. 这座楼是那座楼的五倍高。
The new building is four times the size of the old one.
It is reported that the United States uses ___ energy as the whole of Europe. A. as twice?? ?? B. twice much??
C. twice much as? ?? D. twice as much12. And he would rather keep time for his hobbies.
would rather 宁愿，宁可
He’d rather work in the countryside.
[用法1]：would rather…than… 宁愿…而不…，与其…不如…
I would rather watch TV at home than go to the cinema.[用法2]：would … rather than… =would rather…than…
Facing the enemies, our soldiers would die rather than surrender. 面对敌人, 我们的战士宁死不屈。
Rather than refuse to help you, I would borrow money from my friends. 我宁可向朋友借钱, 也不愿拒绝帮助你。[用法3]：would rather后面也可跟从句表示主语宁愿某人做某事。这时，从句谓语应用虚拟语气，即用一般过去时表示现在或将来要做的事；用过去完成时表示已经做过的事或过去要做的事。
I’d rather you hadn’t told him the news that day.[用法4]: would rather have done sth. 表示主语要做某事, 而结果却事与愿违。
I’d rather have left a note on her desk.
我本想留张字条在她的书桌上。 (事实上没有) [高考链接]
---- Shall we go skating or stay at home?
---- Which ____ do yourself? (’05 全国）
do you rather B. would you rather
C. will you rather D. should you rather答案B would rather do sth. 更喜欢做…1) too much 与much too的区别
too much通常位于动词之后,修饰动词,too做much的状语,后面也可接名词。 13. Indeed, he believes that a person with too much money has more rather than fewer troubles.She does talk too much, doesn’t she?
He has too much work to do.
而much too则常用在形容词或副词之前修饰形容词或副词。
The dress is much too long for me. 这衣服我穿太长了。
I got into the taxi and drove much too fast. 我上了出租车, 并开得飞快。2) rather than 而不是
Mary, rather than her roommates, is going to Beijing. 要去北京的是玛丽, 而不是她的室友们。 注意: rather than 连接两个名词或代词作主语时,谓语动词应与rather than 前面的名词或代词在人称和数上保持一致。
She ran rather than walked. 她跑着而不是走着。He is a student rather than a worker. 他是学生,不是工人。?
They lost some books rather than money. 他们丢了一些书, 而不是钱。
I decided to write rather than (to) telephone. 我决定写信而不打电话。14. He therefore gives millions of yuan to equip others for their research in agriculture.
Therefore adv. 因此，因而
equip vt. 装备，配备，供给，提供
He equipped himself for a long journey. 他为长途旅行准备行装。
Proper education will equip one for a job. 接受一定的教育就使你具备就业的能力.15 . export vt. vi. & n. 出口,输出,排出,出口货,输出量
◆联想：[反义词]import 输入；进口；引进；进口货
■运用：根据中文提示填空。
(1) Fruit ____________(出口) from this country.
(2) Many new materials_______________ (输出) to foreign countries.
(3)我们出口稻米,但进口小麦。
We_____________________________.
(4)非洲向欧洲出口牛肉。
Africa is _______________________Europe
(5)你们国家有哪些主要的出口物品？
What are the chief ______________your country? exports ofis exportedare exportedexport rice but import wheatexporting beef toIf you had the chance to do something to help end hunger in the world, what would you do ?DiscussionThere is still hunger in the world.The measures taken to deal with hunger