高中英语必修3 Unit 2 Healthy eating Section B Learning about Language教学课件（19张ppt）

(共19张PPT)
Unit 2　Healthy eating
Section B　Learning about Language
核心词汇
词汇一　 consult （1）v. 咨询；请教；商量，商议　　　（2）vt. 查阅，查询
◆教材原句
However，as she was so afraid of being laughed at by her friends，she did not consult a doctor... 然而，因为她是如此害怕受到朋友们的嘲笑，所以她没有去咨询医生……
◆要点必记
consult sb. about sth. 就某事向某人咨询 consult with sb. 与某人商议
consult a dictionary 查词典 consult the timetable 查时间表
◆学法点拨
如果请教、咨询的对象比较权威，一般用consult（vt.）；而如果和地位平等的对象一起商量，则多用 consult with。
◆归纳拓展
“查词典”的表达还有：refer to a dictionary，look up...in the dictionary
单句写作
(1) ［2015·天津卷］If you have any doubts about your health，you’d better _________________　　　　　　　　　　　　（咨询你的医生）at once.
(2) Why not 　　　　　　　　（与……商议）Frank about this matter? You see，two heads are better than one.
单句语法填空
(3) ［词汇复现］You can consult the tourist guide 　 　　　the customs of this country.
consult your doctor
consult with　
about
单元语法
情态动词（Ⅱ）
要 点一 　 ought to / ought not to
（1）ought to 意 为“ 应 当，应 该”，跟should 用法基本相同，没有人称、数和时态的变化。
（2）ought to 的否定式是 ought not to 或oughtn’t to，疑 问 式 是 把 ought 放 在 主语前。
（3）ought to have done 过去本该做某事（而没有做）
ought not to have done 过去本不该做某事（却做了）
◆词语辨析
ought to 与 should
·一般说来，两者可换用，只是 ought to的语气略强。
·ought to 多表示由于法令、行为准则、道德责任等客观情况而“应该”做某事。
·should 含有个人意见，强调主观看法。
翻译下列句子并指出 ought to 的用法
(1) We ought to protect animals.
(2) Try phoning that customer—he ought to be home by now.

(3) You ought to balance career and family.
单句写作
(4) ［词汇复现］You 　　　　　　　　　　　　　　（不应该捉弄……）the disabled.
(5) ［词汇复现］— 　　　　　　　　　　　　（我该动身）tomorrow?
—Yes，you ought to.
(6) ［词汇复现］The money to give an award 　　 　　　　　　　（本该足够了）.
(7) You 　　　　　　　　　　　　（本不该告诉）her the news.
(1)我们应该保护动物。（责任或义务）
ought not to play tricks on
Ought I to set off　
ought to have been enough　
ought not to have told
(2) 给那位顾客打个电话试试，他现在应该到家了。（推测）
(3) 你应该平衡好事业与家庭之间的关系。（建议或劝告）
要 点 二　have to/don’t have to/mustn’t
（1）have to
have to 强调客观需要，意为“必须，不得不”。它可以用于不同的时态，其疑问句式和否定句式由助动词do/does/did构成。
（2）don’t have to 和 mustn’t
have to 的否定式 don’t have to 表示没有义务或没有必要做某事，意为“不必”，相当于 needn’t，可回答以 must 开头的疑问句。而 must 的否定式 mustn’t 表示“禁止，不准”。
选词填空（have to/don’t have to/mustn’t）
(1) ［词汇复现］If you earn more than ￡5，000，you will 　 　　　pay tax.
(2) Do we 　　　　　　finish it today?
(3) ［词汇复现］You 　　 　　　　　　consult the dictionary. You can guess these words’ meanings.
(4) ［词汇复现］Cars 　　 　　park in front of the entrance，and they must be parked at the parking lot. 车辆不准停在入口处前面，它们必须停在停车场。
(5) ［词汇复现］—Must we dress up to go to the party?
—No，you 　　　　 　　　　.
have to　
have to　
don’t have to　
mustn’t
don’t have to　
要 点三 　 need / needn ’ t
（1）need 意为“需要，有必要”，既可作情态动词，也可作实义动词。
need 作情态动词
(1) 没有人称和数的变化
(2) 后接动词原形
(3) 常用于否定句或疑问句
(4) 否定式为need not/ needn’t
need 作实义动词
(1) 有人称和数的变化
(2) 后接名词、代词、动名词、带to的不定式
(3) 用于陈述句、否定句或疑问句均可
(4) 否定式和疑问式要借助助动词do/does/did

◆学法点拨
need 作实义动词时常用于下列句式：
sb. need（s）to do sth.某人需要做某事（主语与 do 为主动关系）
sth. need（s）doing/to be done 某事 / 某物需要被……（主语与 do 为被动关系）
（2）needn’t have done 表示“本没有必要做某事（却做了）”。
◆误区警示
（1）用作情态动词的 need 常用于疑问句或否定句，对于以 need 开头的疑问句的否定回答可用 needn’t，但是肯定回答不能用 need，而用 must。
（2）以 must 开头的一般疑问句，肯定回答用 must，否定回答用 needn’t 或 don’t have to。
单句写作
(1) I love the weekend，because I 　　　　　　　　　（不必早起）on Saturdays and Sundays.
(2) ［词汇复现］　　　　　　（我需要召集）the children together at once?
(3) 　　　　　　　（你需要）any help?
(4) ［词汇复现］We 　 　　　　　（不必打扮）. The party has been called off.
单句语法填空
(5) ［词汇复现］The green beans need 　 　　　（harvest）.
needn’t get up early　
Need I gather　
Do you need
don’t need to dress up　
harvesting/to be harvested　
(6) My bike needs 　　 　　（mend）.
(7) You 　 　　　（water）the flowers，for it is going to rain.
句型转换
(8) —Need I gather information about the plan?
— 　　　　　　　　.（作出肯定回答）/　　 　　　　　.（作出否定回答）
(9) —Must I ask for her permission?
— 　 　　　　　　.（作出肯定回答）/　　　　　　　 　.（作出否定回答）
mending/to be mended　
needn’t have watered　
Yes，you must
No，you needn’t　
Yes，you must
No，you needn’t/don’t have to
基础知识自测
Ⅰ 用适当的情态动词填空
1.［2019·天津卷］The professor warned the students that on no account 　 　　　they use mobile phones in his class.
2. 　　　　I have a word with you? It won’t take long.
3. Although you 　　　　find bargains in London，it’s not generally a cheap place to shop.
4. It was sad to me that they，so poor themselves，　　 　bring me food.
5. Life is unpredictable；even the poorest 　　become the richest.
6. I still remember my happy childhood when my mother　　 　take me to Disneyland at weekends.
7. I’ve ordered some pizza，so we 　 　　　worry about cooking when we get home tired.

should
Can
can
should
may/might
would
needn’t
8. He 　 　　　sleep，although he tried to，when he got on such a hunt for an idea until he had caught it.
9. When I was a child，I 　　　　watch TV whenever I wanted to.
10. Harry is feeling uncomfortable. He 　　　　have drunk too much at the party last night.
11. The children 　　　　have lost in the woods；otherwise they would have been at the lakeside camp as scheduled.
12.［2019·江苏卷］No one 　 　　be more generous; he has a heart of gold.
13.［2014·江苏卷］By knowing precisely what you are receiving and what you are missing out on，you ought 　　　　be able to make better-informed，more reasonable decisions.
14. The door 　　 　open，no matter how hard she pushed.
15. Since nobody gave him any help，he 　　　　have done the research on his own.
couldn’t
could
must
can/could
to
wouldn’t
must
must
学科素养提升
Ⅱ 语篇填空
A
主题：人与自然（环境保护） 体裁：说明文　　话题：根据膳食调整种植结构
　　［2018·全国Ⅱ卷］Diets have changed in China—and so too has its top crop. Since 2011，the country 1　 　 （grow） more corn than rice. Corn production has jumped nearly 125 percent over 2　 　　　past 25 years，while rice has increased only 7 percent.
　　A taste for meat is 3　 　 　　（actual） behind the change：An important part of its corn is used to feed chickens，pigs，and cattle. Another reason for corn’s rise：The government encourages farmers to grow corn instead of rice 4　　 　　（improve） water quality.
has grown 　
the
actually　
to improve
Corn uses less water 5　　 　rice and creates less fertilizer（化肥）runoff. This switch has decreased 6　 　 　　（pollute） in the country’s major lakes and reservoirs and made drinking water safer for people.
　　According to the World Bank，China accounts for about 30 percent of total 7　　　　（globe） fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005—when the government 8　　 　（start） a soil-testing program 9　 　　　gives specific fertilizer recommendations to farmers—and 2011，fertilizer use dropped by 7.7 million tons. That prevented the emission（排放） of 51. 8 million tons of carbon dioxide. China’s approach to protecting its environment while 10　　 　　（feed） its citizens “offers useful lessons for agriculture and food policymakers worldwide，”says the bank’s Juergen Voegele.
than　
pollution　
global 　
started
that/which 　
feeding　
B
　　　　　主题：人与自我（生活） 体裁：说明文　　话题：健康
　　Diet and the way of life are often a problem for teenagers. However，if you eat the right food and exercise 1　　 　　（regular），you can feel better，look better and have more energy，so healthy eating along 2　　 　regular exercise is properly the only way to become fit.
　　As a teenager，it is important to give your body the energy 3　　　　needs. For a healthy diet，you should eat mostly rice，bread，vegetables and fruit. You also need to drink a lot of water—six to eight glasses a day. 4　　 　（drink）enough water will improve your skin and give you
regularly 　
with
it
Drinking
5　 　　　（health）hair.
　　Exercise is something 6　 　　　can help to make you look good，feel good and be healthy. Teenagers should spend at least 30 minutes exercising，five times a week. Walking and riding your bike count，and so do school sports. When you exercise，your body produces some
7　　　 　（chemical）that make you feel peaceful and 8　　　　（relax）and increase your ability to concentrate when you study. These chemicals can even help you sleep better at night. A good amount of sleep every night 9　　　（be）also important for your health. Teenagers need eight to ten hours of sleep each night.
　　If you follow the suggestions above，you will look and feel much 10 　　　　（good）in no time at all.
healthy
that
chemicals
relaxed
is
better
The end!