人教英语必修四unit2教案

Unit 2 Working the land
Warming Up and Reading
Teaching aims
Knowledge aims:
1)words and expressions:sunburn, struggle, super, expand, circulate, equip, export, rid ... of, be satisfied with, lead a ... life, search for, would rather, thanks to, with the hope of, rather than
2)important sentences;
3)knowledge of the topic:to learn sth. About Yuan Longping and his great achievement
Ability aims:
1)To do some reading to further develop Ss’ reading abilities like skimming, scanning and summarizing etc.
2) To help develop Ss’ good reading habits.
Emotional aims:
1)To help ss have a better understanding of the great value of the scientific research done by Dr Yuan Longping.
2)To cultivate ss’ sense of sympathy and humanism.
3)To get them to learn some noble character from Dr Y uan.
Teaching key points:
1)To get ss to read the text and learn something about the scientist, his great achievements and his personality.
2) To improve ss’ reading skills.
Teaching difficult points:
1)How to help develop their ability of analyzing some difficult sentences.
2)How to help them to form a good habit of reading.
3)How to improve their ability of outlining the main idea of the whole text or each paragraph.
Teaching method:
Task-based language teaching and discussion
Teaching aids:
Stude nts” learning paper, blackboard
Teaching procedures：
Step 1 Lead –in
1.Students’ presentation
Farmers weeding at noon, Sweat down the field soon.
Who knows food on a tray, Due to their toiling day.
Ask Ss what the poem is about.
2. Show the pictures of people who are planting rice and ask some students to introduce the way of growing rice.
Step 2 Pre-reading
Q: What kind of crop can produce more rice and who invented it?
Step 3 Reading
1. Skimming
Task1: Listen to the tape and match the main idea with each paragraph.
Para.1 A. DrYuan’s dreams.
Para.2 B. Dr Yuan’s attitude towards life.
Para.3 C. Dr Yuan’s education and his study on agriculture.
Para.4 D. Yuan Longping who worked hard to produce a new kind of rice.
E. DrYuan’s appearance and his ach ievements.
Para.1-E Para.2-C Para.3-B Para.4-A
2. Scanning
Task2: Choose the best answer to each question according to the text.
(1). According to the text, in 1950, Chinese farmers could produce about __C___ million tons of rice.
A. 26
B.260
C.56
D.560
(2). What does the word “battle” refer to in Para.2 ? B
A. The low rice output.
B. Ridding the world of hunger.
C. Fighting against farming.
D. The freedom to do research
(3). It can be inferred (推断) from the text that C .
A. Yuan cares about money and being famous.
B. Yuan is interested in playing the piano.
C. Yuan’s rice is grown in many countries.
D. Spending money on himself means very little to Dr Y uan.
3.Careful reading
Step4 Summary (using about 30 words)
The passage tells us that the great achievements Yuan Longping made in his research on hybrid rice , his noble personalities and his dreams.
Step 5 Homework
1. According to the resume, write a passage about Yuan Longping using 5 sentences.
2.Fill in the blank
Yuan Longping is one of China’s most famous 1 (science).Born in 1930, DrYuan graduated 2 Southwest Agricultural College in 1953.At that time, hunger was 3 disturbing problem in many parts of the countryside. Since then, 4 (find) ways to grow more rice has been his life goal. In 1974, he invented Super hybrid rice and 5 (become)the first 6 (agriculture) pioneer in the world.
Thanks to 7 research, the UN has more tools in the battle to rid the world 8 hunger. Dr Yuan is now circulating his knowledge in many less developed countries.
Keys: 1.scientists 2. from 3.a 4. finding 5. became 6. agricultural 7. his 8. of
Important language points
Step1 Revision
1.Check the homework exercises.
2.Ask some Ss to talk about Dr Longping and his super hybrid rice.
Step2 Studying important language points
1.Although he is one of China’s most famous scientists, Yuan Longping considers himself a farmer,for he works the land to do his research.
这是一个并列复合句。

Although he is one of China’s most famous scientists时让步状语从句；for he works the land to do his research 是并列分句。

For后面可以跟分句，表示原因，但和because不同。

Because是从属从句，引导状语从句，表示直接的原因；for只是顺便带出一个事实作为陈述的理由，并不是直接的原因，也不能放在句首。

例如：Prepare to alight,for we are almost there.
2.Indeed ,his sunburnt face and arms and his slim,strong body are just like those of millions of Chinese farmers,for whom he has struggled for the past five decades.
句子的主语是一个较长的名词词组，his sunburnt face and arms 和his slim,strong body 由and 连接，是并列关系。

Those此处用来代替前面出现的sunburnt face and arms 和slim, strong body. For whom he has struggled for the past five decades 是非限制行定语从句。

struggle vt.&vi. 斗争；拼搏；努力struggler n. 斗争者；奋斗者struggling adj.奋斗的；努力的struggle with/against... 同。

搏斗
E.g.: We must struggle against this prejudice.
3.In 1974,he became the first agricultural pioneer in the world to grow rice that has a high output.
不定式房子the first ,the last,the best 以及the only, the very,the right等词后面，且这些词与动词不定式有逻辑上的主谓关系，结构为：the first/las/best/right/only/very/...+n.+to do sth.意为“第一个/最后一个/最好的一个/合适的/唯一的/恰好的/。

做某事的人/物”。

He is always the first (Ss) to come and the last to leave.
4.This special strain of rice makes it possible to produce one-third more of the crop the same fields.
make it +宾语补足语+动词不定式，it作形式宾语，动词不定式是真正的宾语，有时真正的宾语是从句。

常和动词consider/think/make/find/believe/declare/feel/guess/imagine/prove等连用。

如：
We make it a rule to do some English practice before class.
5.Since then,finding ways to grow more rice has been his life goal.
Finding ways to grow more rice是动名词短语，在句中作主语。

动名词或动名词短语作主语时，谓语动词通常使用单数形式。

E.g.: Learning a foreign is very useful to me.
6.Dr Yuan searched for a way to increase rice harvests without expanding the area of the fields.
1)search for 寻找；寻求
He spent half an hour searching for the key to the door.
2)expand vt.伸展；伸开expansion n. 扩充，膨胀；开展
The shipbuilding industry is rapidly expanding.
7.Thanks to his research, the UN has more tools in the battle to rid the world of hunger.
1)thanks to (sb./sth.):because of (sb./sth.)由于；多亏
Thanks to Dr Smith, I can walk around again now.
2)rid vt. 摆脱；除去get/be rid of (sth./sb.) 摆脱
He was a bo ring man! I’m glad to be rid of him.
3)the UN: the United Nations 联合国
ing his hybrid rice,farmers are producing harvests twice as large as before.
形容词原级as...as的前面可以用表示倍数的词（如half,a quarter,twice,three times 等），意为“是。

的多少倍”。

The bedroom is twice as large as the kitchen.
9.Dr Yuan is quite satisfied with his life.However, he doesn’t care about being famous.
1)be satisfied with 对。

感到满意
I was very satisfied with the result.
2)care about 在乎在意喜欢有兴趣
It is dangerous to get into the matter but he seems to care little about that.
10.He would much rather keep time for his hobbies.
would rather do (than do）：prefer to 宁愿；宁可；较喜欢
Jane would rather stay at home (than go to parties).
11.Spending money on himself or leading a comfortable life also means very little to him.
句中的Spending money on himself 和leading a comfortable life是两个动名词短语，由表示选择关系的并列连词or连接，所以谓语动词mean用单数形式。

12.He therefore gives millions of yuan to equip others for their research in agriculture.
therefore adv. For that reason 因此；所以；因而
I was ill, and therefore could not come.
13.Each ear of rice was as big as an ear of corn and each grain of rice was as huge as a peanut.
As...as常用于形容词或副词的原级比较，否定句也可用so...as。

例如：
This dress is as expensive as that one.
He doesn’t play half as/so well as his sister.
14.Dr Yuan awoke from his dream with the hope of producing a kind of rice that could feed more people. in/with the hope of:because of the wish for 怀着/带着。

的希望
I called in the hope of finding her at home.
15.Now, many years later, Dr Yuan has another dream:to export his rice so that it can be grown around the globe.
句中的to export his rice so that it can be grown the globe是不定式短语，作dream的同位语，说明dream的内容；其中，so that it can be grown around the globe是目的状语从句。

export vt.&vi. send to another country for sale 输出；出口
exporter n. 出口者exportation n.输出；出口
India exports tea and cotton to many different countries.
Step3 Learning about Language&Using Language
1.regret：vt. be sorry 遗憾；惋惜n.遗憾；懊悔
regret doing/having done sth. 后悔已做了某事
regret that 遗憾/后悔。

Tom regretted telling his parents the thing.
He told me with regret that he couldn’t come to the party.
2.build up逐渐增强；建立；开发
He tried to build up his strength.
3.lead to导致；造成（后果）
All roads lead to Rome.
4.focus n. 焦点；中心点vt. 集中；聚集
focus on 集中于All eyes focused on her.
5.reduce vt.减少；减缩reduce...by 减少了reduce...to 减少到（其后常加具体数字）
We must reduce our expenses to 300 yuan a month.
6.keep...free from使。

免受（影响；害等）；使。

不含（有害物）
We should keep ourselves free from drugs.
ment n. 评论；议论
commentary n. 注释，批评，评论commentator n. 注释者，时事评论者
comment on/about sth./sb. 对某事/某人评论
I won't comment on what people say.
Step4.Homework
1.Finish off the workbook exercises.(P.12/Exercise3,P49/Exercise3)
2.Learn the new words and expression in this part by heart.
Learning about Language: Grammar
Step 1 Revision
1.Check the homework exercises.
2.Let Ss dictate some new words and expressions.
Dictation:statistic,sunburnt,struggle,decade,super,output,crop,rid...of,be satisfied with,would rather....
Step 2 Leading in
1.Ask Ss to turn back to Page 10 to read through the passage, pick out the sentences using the -ing forms as either the subject or the object, and then underline the -ing form in each sentence and translate the whole sentences into Chinese.
1)Since then, finding ways to grow more rice has been his life goal.(subject)
2)As a young man, he saw the great need for increasing the rice output.(object of preposition)
3)Dr Yuan searched for a way to increase rice harvests without expanding the area of the fields.(object of preposition )
4)However, he doesn’t care about being famous.(object of preposition )
5)He enjoys listening to violin music,playing mah-jong, swimming and reading.(object of verb)
6)Spending money on himself or leading a comfortable life also means very little to him.(subject)
7)Just dreaming for things, however, costs nothing.(subject)
8)Dr Yuan awoke from his dream with the hope of producing a kind of rice that could feed more
people.(subject)
2.Discovering useful structures
Have them try to sum up some uses of the -ing form.
Step3 Grammar learning
动词-ing形式作主语和宾语的用法
1. 动名词作主语
1)名词直接放在句首作主语。

例如：
Seeing is believing.
Helping her is my duty.
2)动名词在“It is no use/ no good/ fun / a waste of time/ a good pleasure 等名词+ doing”结构中作主语，it为形式主语。

It is no good writing to him; he never answers letters.
动名词在“It is useless/ nice/ good/ interesting/ worthwhile 等形容词+ doing”结构中作主语。

It is good playing chess after supper.
3)动名词在“There is(was) no + doing”结构中作主语。

There is no telling what he is going to do.
2. 动名词作宾语
1)有些动词后面要求跟动名词作宾语。

常这样用的动词有：
admit 承认; excuse 原谅;postpone 拖延;anticipate期望;fancy想象;practice 练习; appreciate 欣赏;finish 完成;prevent 防止;avoid 避免;forbid 禁止;propose 建议; consider 考虑;forgive 宽恕;recollect 回忆;delay 耽搁;imagine 想象;resent 厌恶;deny 否认; involve 涉及;resist 抵制;detest 厌恶;keep 保留;risk 冒险;dislike 讨厌;mind 在意;save 挽救;dread 害怕;miss 错过;suggest 建议;enjoy 喜欢;pardon 原谅;understand 理解; escape 逃避;permit 允许
I recommend buying the dictionary.
I don’t anticipate meeting any opposition.
2)有些动词短语后也要求跟动名词作宾语。

常这样用的动词短语有：
can’t stand 忍不住;can’t help 忍不住;feel like 想，欲；
give up 放弃;put off 推迟
Do you feel like taking a walk?
3)动名词常跟在介词或介词短语后做宾语。

常这样用的介词短语有：instead of, look forward to, object to, keep on, see about, take to 等。

We are looking forward to coming to China.
注意:下列短语中的to都是介词
devote …to, object to(反对), pay attention to, get down to(着手做), look forward to，lead to, be/get used to, stick to, make contributions to
4)在“have difficulty (trouble, problem, a hard time, fun, a good time) (+in) + 动名词;be busy (in) + 动名词;waste time (in) + 动名词;lost time (in) + 动名词;There is no point (in) + 动名词”等结构中，动名词做介词宾语，in常要省去。

The children are busy doing their homework.
5)在复合宾语中，用it作形式宾语，将动名词短语放在后面。

例如：
I consider it a waste of time arguing about it.
我认为辩论这事是很浪费时间的。

6)在“there be”结构当中，be为动名词时，该结构也是一种带逻辑主语的动名词形式。

We can imagine there being a lot of fuss about it.
我们可以想象到人们对此大惊小怪。

Were you disappointed at there not having been more gifts?
你对没有更多的礼物感到失望吗？
3. 动名词的被动式
1)动词need, require, want, deserve后，用动名词的主动形式表示被动意义。

其用法相当于不定式的被动结构。

The watch needs repairing. (=The watch needs to be repaired.)
2)在（be）worth后面只能用动名词的主动态来表示被动意义。

His suggestion is worth considering.
4. -ing与不定式的比较
1)-ing表示的动作通常是一个泛指的动作，不定式则通常表示具体的动作。

我喜欢看书，但是我现在想看电影。

I like reading, but now I like to see a film.
2)可接动名词又可接不定式作宾语的动词：
begin/start/continue to do/ doing
like/love/hate to do/doing
forget/ remember/ regret to do/doing
3)go on doing 继续做原来做的事mean doing 意味着要做某事
go on to do 接着做另一件事mean to do 想要做某事
stop doing 停止做某事try doing 试着做某事
stop to do 停下来（别的事）开始做某事try to do 努力做某事
be used to doing 习惯于做某事can't help doing 禁不住做某事
be used to do 被用来做某事can't help to do 不能帮助做某事
Step4 Grammar practice
1.Turn to P.13./Exercise 2/Exercise 3/Exercise 4
2.Turn to P.50./Exercise 1
Step4 Homework
1.Finish off the Workbook exercises.(名师P.41./Exercise 1)
2.Preview the reading passage.。