人教版高中英语配套ppt课件：选修6 Unit 4 Global Warming （共104张PPT）

课件104张PPT。Unit 4 Global Warming People and the sources of air
pollution are found in the same
places. This means that cities
with large populations have the
biggest problem of dirty air. Air pollution is caused by many different things. A major source of air pollution is the gas fumes from cars. Statistics show that 93 percent of all auto trips are within cities. Another major source of dirty air is the burning of coal and oil for energy. This energy is needed to make electricity. Of course, much more electricity is used in the city than in the country.
On the average, we throw away more trash and garbage than the year before. ①The burning of garbage contributes to air pollution. Many major industries are also responsible for the dirty air in the around cities. The fumes from iron, steel, chemical, and petroleum production add particles to the air.②The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy for traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may kill trees and plants and
cause metal to corrode. In some of the larger cities, these fumes endanger the live of human beings by contributing to lung diseases and causing early death.Ⅰ.阅读短文，判断正(T)误(F)
1．The purpose of this passage is to persuade people to stop polluting the air. (　　)
2．Air pollution is more grave in the city than in the country because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country. (　　)
3．The fumes from coal and oil may cause metal to turn black. (　　) 4.In larger cities, the fumes from coal and oil may contribute to heart disease. (　　)
答案　1.F　2.T　3.F　4.FⅡ.佳句仿写
1．诚实加苦干有助于成功和幸福。
Honesty and hard work ________ ________ ________ ________ ___________.
2．这个汽车旅馆的房价每天从三十美元到五十美元不等。
The room rate at this motel ________ ________ ________ ________ ________ per day. contribute to successand happiness　ranges from $30 to $50Unit 4 Global Warming Period 1 Warming Up, Pre-reading & Reading 课件（人教版选修6，课标通用）Ⅰ.单词识记
1．________v. to pay money, usually once a year, to have copies of a newspaper or magazine sent to you, or to have some other service
2．________v．to use sth up，especially fuel，energy or time；to eat or drink sth
3．________n．a general tendency in the way a situation is changing or developingsubscribe　consume　trend 4．________n．a substance such as coal, gas, or oil that can be burned to produce heat or energy
5．________v．to look quickly at sth/sb
6．________n. a number of people or things that are all different, but are all of the same general type
7．________adj.happening or chosen without any definite plan，aim or pattern
8．____________n．a terrible event in which there is a lot of destruction or many people are injured or die
9．________adj. continuing or developing gradually or without stopping, and not likely to change
10．________v．to disagree with something fuel　glance　range　random　catastrophe　steady　opposeⅡ.短语天地
1．____________上升；增长；升起
2．____________即使
3．____________发生；造成
4．______________在……范围内
5．____________(粗略地)看一下；扫视
6．subscribe to___________________
7．keep on____________
8．be opposed to____________
9．quantities of____________
10．result in____________go up　even if　come about　in the range of　glance at　同意；赞成；订购　继续　反对……大量的　导致 Ⅲ.句型搜索
1．There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon.
[信息提取]　There is no doubt that...，毫无疑问……。
[例句仿写]　毫无疑问，我们能把这项工程设计出来。
________ ________ ________ ________ ________ we will succeed in designing the project.There is no doubt that　2．It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.
[信息提取]　causing the global temperature to go up 是现在分词短语作状语，表示结果。
[例句仿写]　他把杯子掉了，结果摔得粉碎。
He dropped the glass, ________ ________ ________ ________.breaking it intopieces　3．Even if we start reducing the amount of carbon dioxide and other greenhouse gases，the climate is going to keep on warming for decades or centuries.
[信息提取]　even if＝ even though“即使，尽管”(引导让步状语从句)
[例句仿写]　即使我这次失败了，我还要再试试。
________ ________ ________ ________ ________ ________， I would try again. Even if I fail this time Ⅳ.预读理解　　　　　　　　　　　　　　　　　　　
1．Fast Reading：Scan the text and choose the best answers according to the text.
①Who among the four is the author?
A．Sophie Armstrong. B．Charles Keeling.
C．Dr Foster. D．George Hambley.②Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1997?
A．Sophie Armstrong. B．Charles Keeling.
C．Dr Foster. D．George Hambley.③What are the graphs and quotes for?
A．To attract readers' attention.
B．To introduce the topic of global warming.
C．To give some examples.
D．To support the opinion and make it more convincing.④What is the purpose of the last paragraph?
A．To make readers disappointed with the problem.
B．To make readers think about the problem.
C．To show the author's opinion on the problem.
D．To begin some discussion about the future.⑤What is mainly discussed in the text?
A．Carbon dioxide.
B．Water vapour.
C．Gases in the atmosphere.
D．The warming of the earth.
答案　①A　②B　③D　④B　⑤D2．Careful Reading: Read the text carefully and then answer the following questions.
①What are the names of the three scientists mentioned in the article?
________________________________________________
　Dr Janice Foster，Charles Keeling，George Hambley.②What do they think about global warming？Do they agree with one another?
________________________________________________________________________________________________There are some very different attitudes among scientists towards this issue.Some think the effects will be terrible，while some others believe that we should not worry about it.
__________________________________________________________________③What are the effects of global warming?
_____________________________________________
_____________________________________________
There may be a rise of several metres in the sea level.There may be more severe storms，floods，droughts，famines，the spread of diseases and the disappearance of species.
____________________________________________________________________1．consume v．消费，消耗；吃完；喝光
Each year Americans consume a high percentage of the world's energy.
每年美国人都消耗掉世界能源的很大比例。
This will consume his health, destroy his temper.
这将损害他的健康，毁坏他的情绪。
How many rice did you consume last year?
去年你们吃了多少大米？consumer n．　　　　　　 消费者，用户，消费品
consumer goods (家用)消费品
consumers' association 消费者协会
consumption n. 消费(量)，消耗(量)
time-consuming adj. 耗费时间的
consuming adj. 消费的；强烈的 The ancient consumer city was now turned into a modern industrial base.
这个古老的消费城市今天已经变成了一个现代化的工业基地。
It's vital to impress the consumer with a good advertising campaign.
进行广告宣传，使消费者熟悉产品，是至关重要的。
He has to cut down on the consumption of meat.
他不得不减少吃肉。
Basketball is his consuming passion.篮球令他着迷。用consume的适当形式填空
①We should adopt the ____________ suggestion.
②Industrialized countries are _____________ 70% of the world's energy.
③We have measured the car's fuel _____________.
④She _____________ the big cake. consumers'　consuming　consumption　consumed 2．subscribe vt.&vi.
(1)捐助；捐赠
He subscribed a large sum of money to charities.
他向慈善团体捐赠了一大笔钱。
(2)签署(文件)；签(名)
He subscribed his name to the contract.
他在合同上签了名。
(3)同意
No one but mad people would subscribe to such views.
只有疯子才会同意这样的观点。(4)订阅
If you subscribe to the newspaper, it'll be delivered to your door.
如果你订阅报纸，它会直接给你送到门上的。subscribe to...　　　　 订阅(报纸或杂志)；同意，
赞同……；向……捐款
subscribe for... 认购(股票)
subscription n. 订阅费 ；订购款；订购
subscriber n. 订阅人，订户，订购者【完成句子】
①I ____________ ________ a monthly magazine.
我订阅了一份月刊杂志。
②The magazine is trying to get more readers ________ __________.
该杂志正大力发展新订户。
③The number of ________ ___________ increased last month.
上个月电话用户数增加了。subscribed to　tosubscribe　phone subscribers④We ________ ________ an animal protection society.
我们定期捐款给一个动物保护基金会。
⑤Chengdu firms will also ________ ________ 4,500 shares, with the financial concept.
公司还将认购成都商行4 500万股股份，具备金融概念。subscribe to　subscribe for3．quantity n．量，数量，数额，数目
He prefers quantity to quality when food is concerned.
就食物而言，他讲究量不讲究质。
Quantities of food and tents were sent to Japan from China.
大量的食品和帐篷被从中国运到日本。 in quantity　　　　　　　大量地
quantities of＋不可数名词/可数名词复数＋复数谓语动词
a quantity of＋不可数名词/可数名词复数＋单数谓语动词 Quantities of water were wasted in our daily life.
大量的水在我们的日常生活中被浪费。
A large quantity of bear is needed urgently here.
这儿急需大量的啤酒。 【单项填空】
①________increases every year as natural habitats disappear.
A．The amount of endangered species
B．The quantity of endangering species
C．The number of endangered species
D．The majority of endangering species解析　句意：随着自然界动物居所的消失，濒危物种的数量每年也在增加。endangered species意为“濒危物种”，endangered表示被动，不能换成endangering, 因为ing形式表示主动。the amount of 修饰不可数名词，所以A项不对；the quantity of和the majority of虽可修饰可数名词，但其中的endangering不合语法，所以选C项。
答案　C
②________food are stored in the tunnel in winter.　　　　　　　　　　　　　　　　　　
A．Large quantities of B．A great many
C．A large number of D．Quite a few
解析　large quantities of后面既可跟可数名词的复数又可跟不可数名词。句意：冬天大量的食物储藏在坑道里。
答案　A4．tend
(1)vi. 趋向；易于；往往会
Fares tend to go down in the autumn and rise again at Christmas.
交通票价秋季时趋于下降，而圣诞节期间又开始回升。
My family tend to be quite long-lived.
我家族的人大都相当长寿。
(2)vt.&vi. 照顾；照料
Tend to your own affairs.去管你自己的事吧。
Mom was usually busy tending (to) my younger sisters.
妈妈通常要忙于照顾我的妹妹们。tend to do sth　　　　　　往往……；趋向于……
tend ( to) sb/sth 照顾……；看护……
tend towards 有……倾向
tendency n. 倾向；趋势 His views tend towards the extreme.他的观点趋于偏激。【完成句子】
①She ________ ________ get angry when others disagree with her.
别人不同意她的看法时，她很容易生气。
②A shepherd ________ ________the sheep.
牧羊人照顾羊群。
③There is a growing ________ for people to work at home instead of in offices.
人们在家里而不是在办公室里工作的趋势日益增长。tends to　tended to　tendency　④Modern furniture design ________ ________ simplicity.
现代家具设计越来越简单。
⑤He ________ ________ selfishness.
他有自私自利的倾向。tends to　tends towards5．consequence n．[C]结果；后果；影响
Don't be uneasy about the consequences.
不必为后果忧虑不安。
He is a man of consequence in the Labour Party.
他是工党中举足轻重的人物。(1)as a consequence＝in consequence
　　　　　　　　　　　 结果，因此
in consequence of＝as a consequence of
　　　　　　　　　　　 由于；因为……的缘故
be of much/any/little/no consequence
很/有点/不大/不重要
answer for the consequences 　 对后果负责
take the consequences of 承担……责任
(2)consequent adj. 作为结果的；随之发生的
consequently adv. 因而；所以 We hadn't enough money to pay our bus fare，and in consequence we had to walk.
我们没有足够的钱买车票，所以只能步行。
More than 200 people in Thailand lost their lives in consequence of/as a consequence of flood.
由于洪水，在泰国有200多人失去了生命。
Your opinion is of little consequence to me.
你的意见对我而言不重要。
You have to take the consequences of the accident.
你必须承担这次事故的责任。
He had been ill for a long time and consequently he was behind in his work. 他病了很久，因此耽误了功课。【完成句子】
①________ ___________ ________ your bad work I am forced to dismiss you.
你工作不好，我只能解雇你。
②A severe flood struck the city and there was a __________ shortage of food.
该市遭到严重水灾，结果造成食物匮乏。
③If you go on doing this, we won't ________ ________ ________ ___________.
如果你们继续这样干，后果我们将不负责。the consequenceIn consequence of　consequent　answer for ④I'm quite willing to accept the ____________.
我完全愿意承担后果。
⑤It rained yesterday and in ____________ the match was canceled.
昨天下雨了，结果比赛被取消。
⑥________ ________ ___________ ________ ________， my father coughs frequently.
因为吸烟的缘故，我父亲经常咳嗽。consequences　consequence　As a consequence of smoking 6．state v．陈述，说明，阐明
Chairman Hu Jintao stated that China and Russia were developing a strong relationship.
国家主席胡锦涛宣布中俄正在发展一个稳定的关系。
He didn't state whether the information was true.
他没有说明信息是否属实。
“Jemma is going back with me，”George stated firmly.
乔治坚定地说：“Jemma要和我一起回去。”(1)state a fact/an opinion　 陈述事实/观点
state the obvious 陈述显而易见的事
It is/was stated that... 据称……
(2)state n. 状态，状况，情形；
政府；州，邦
in a bad/good state 处于坏的/好的状况中
statement n. 陈述，声明
make a statement 声明 It was stated that standards at the hospital were dropping.
据称，那家医院的医疗水准在不断下降。
Economically, the country is in a very healthy state.
从经济学的观点来说，国家处于很兴旺的状态之中。
He is reading a report of the state of the roads.
他正在看一篇关于道路状况的报告。
Should industry be controlled by the state?
工业应该由国家控制吗？
The minister at first declined to make a statement, but later she agreed.部长起初拒绝发表声明，但后来她同意了。【完成句子】
①Having witnessed the accident I thought it was my duty to ________ ________ ________ ________ ________ ________.
由于我亲眼目睹了那次事故，我觉得向警察陈述是义不容辞的。police　make a statement tothe②She wept to see him ________ ________ ________ ________.
她一见他那种情形簌簌泪下。in such a state　③Alaska is ________ ________ ________ ample size.
阿拉斯加是个大州。a state of　④________ ________ ________ and address.
请说出你的姓名和地址。State your name7．range n．种类，范围；一系列；变化的幅度；级别； 界限；射程
The library has ranges of books in perfect order.
这个图书馆的书一排一排放得井井有条。
The price of the house is well beyond our range.
房子的价格远远超出了我们能承受的范围。
The elegant lady came within my range of vision.
这位优雅的女士进入了我的视野。(1)in /within range(of sth )　 (……的)范围之内
out of range (of sth) (……的)范围之外
(2)range v. 变化；变动；排列
range from...to...＝ range between...and...
在……到……范围内变化 卡片以字母顺序排列。
The frontier range from the northern hill to the southern coast. 边界从北部山地一直延伸到南部海岸。
His interests ranged from chess to canoeing.
他的爱好从下国际象棋到划独木舟，范围很广。【图解助记】【完成句子】
①The temperature ________ ________ ________ ________ ________ degrees centigrade.
温度在摄氏三十度与四十度之间。
②This shop sells ________ ________ ________ ________ ________，all of which are the choicest .
这家商店卖的手表都是精品，而且种类还特别多。ranges between 30 and 40 a wide range of watch8．glance
(1)vi.瞥一眼；匆匆一看；扫视
She glanced shyly at him and then lowered her eyes.
她羞怯地偷看了他一下，随即垂下眼帘。
She glanced into the looking-glass before leaving her bedroom.她在离开卧室前匆匆照了一下镜子。
(2)n.一瞥；扫视
Tom glanced at/took a glance at the newspaper headlines.
汤姆匆匆看了一眼报纸的大标题。
At first glance the problem seemed easy.
乍一看问题似乎很容易解决。glance at/down/over/through 　　浏览；粗略地看
have/take a glance at 匆匆一看；一瞥；扫视
at a glance 立刻，一眼
at first glance 乍一看；乍看之下她匆匆看了一下表走了。
He glanced over the morning paper and went out.
他匆匆地浏览了晨报然后出去了。
He could tell at a glance what was wrong with the car.
他一眼就能看出汽车有什么毛病。【比较网站】 stare at/glance at/glimpse at/glare at【单项填空】
He________the envelope and recognized his father's handwriting.
A．stared at B．glared at
C．looked at D．glanced at
解析　考查动词短语辨析。句意：他瞥了信封一眼，认出是父亲的笔迹。stare at“盯着看”；glare at“怒目而视”；look at“看 ……”；glance at“瞥一眼”。 由句意可知选 D项。
答案　D1．come about发生；造成
Her mouth open and shut, but no sound comes out.
她的嘴张开又闭上了，没有发出声音。
Can you tell me how the accident came about?
你能告诉我事故是怎样发生的吗？come across　　 偶遇；穿越
come along 进展，进行
come back 回来；重新流行
come down 进来；到达
come out 出来；开花；出版；结果是……
come up 上来；(问题等)被提出；发芽(无被动式)
come up with 追上，赶上，不落后；提出，提供
come to 达到；到达；共计I came across the children sleeping under the bridge.
我偶然发现睡在桥下的孩子。
When is her new novel coming out?
她的新小说何时出版？
I never expected those few items to come to so much.
我根本没想到就那么几件东西合计起来竟要花这么多钱。【比较网站】 happen/break out/take place/come about/occurThe 2012 Olympic Games will take place in London.
2012年奥运会将在伦敦举行。
It suddenly occurred to me that there would be a basketball match between China and South Korea the next evening.
我突然想到第二天晚上将有一场中国队和韩国队的篮球比赛。【完成句子】
①A fire ________ ________ during the night.
夜间突然发生了火灾。
②I'll never understand how it ________ ________ that you made such a mistake.
我真不明白你居然犯了这么个错误。
③________ ________ ________ ________ ________ that he was lying?
你当时没想到他在撒谎吗？Didn't it occur to you came about broke out　④Luckily the earthquake didn't ________ in the center of the city.
幸亏地震没有发生在市中心。
⑤________ ________ ________ I had no money on me.
我刚好没钱了。
⑥Great changes ________ ________ ________ in China since then.
自从那时中国发生了翻天覆地的变化。happen　It happened that　have taken place2．go up上升，增长；升起
The financial times share index went up five points yesterday. 《金融时报》的股票指数昨天上升了五点。
The import of cotton goods went up sharply in those years. 那几年，棉织品的进口猛增。
We watched the national flag go up slowly with pride.
我们自豪地注视着国旗慢慢升起。【温馨提示】go up 为不及物动词短语，没有被动语态。
go against sb　　　 对某人不利
go against sth 违反；与……不符
go ahead 走在前面；先走
go over 仔细检查
go through 经历；遭受；穿过；通过；完成；浏览
go in for 爱好；从事；参加；赞成 Don't go against your parents' wishes.
不要违背父母的意愿。
Be sure you are right, then go ahead.
确信正确，切莫畏缩。
It will be wise to go over your test paper again.
还是把您的考卷再检查一遍的好。
The country has gone through too many wars.
这个国家经历了太多的战争。
Go through those doors, and you'll see it on the right.
穿过那些门，你在右边看到的就是了。
He thought it his duty to go through the papers.
他认为自己有责任检查这些文件。【单项填空】
①—Things are getting more expensive now.
—It's________that prices will continue to________.
A．sure；go up B．certain；go up
C．sure；raise up D．certain；raise up
解析　句意：——如今东西变得越来越贵了。——价格一定还会继续涨。sure的主语必须是人，certain的主语可以是人也可以是物；raise是及物动词，后面不能跟up。故选B项。
答案　B②—Do you think that housing price will keep________in the years to come?
—Sorry，I have no idea.
A．lifting up B．going up
C．bringing up D．growing up
解析　问句句意：你认为接下来几年房价还会上涨吗？go up“(河水、价格)等的上涨”，符合句意。lift up鼓舞；bring up抚养；grow up成长。
答案　B3．result in导致
The fire resulted in eleven people being killed and the destruction of the factory.
火灾造成了十一人死亡，工厂被烧毁。
The fresh policy results in economic development of the European Union. 那项新政策促进了欧盟的经济发展。
His careless speech resulted in much argument.
他发言过于草率，因而引来许多争议。【比较网站】 result in/ result from/ as a result/as a result ofThe terrible accident resulted from his carelessness.
那起可怕的意外事件因他的疏忽大意而引起。
Tom broke his legs，as a result, he was taken to hospital.
汤姆的腿骨折了，因此被送进了医院。
As a result of her hard work, she was finally admitted to her ideal university.
她勤奋苦读，终于考进了她理想的大学。 【图解助记】【单项填空】
①The problem of global warming is serious.________，the sea levels have risen a little.
A．As a result B．On the contrary
C．In particular D．In other words
解析　考查介词短语辨析。句意：全球变暖的问题很严重。因此，海平面有所上升。A项意为“结果”；B项意为“相反的是”；C项意为“尤其，特别”；D项意为“换句话说”。根据句意选A项。
答案　A②The accident that resulted________the death of 19 children resulted________careless driving.
A．in；on B．in；from
C．on；in D．from；in
解析　句意：导致19名孩子丧生的事故起因于粗心驾驶。result in 后跟结果；result from后跟原因。故选B项。
答案　B4．be opposed to反对
Many people are opposed to the sale of arms on principle.
许多人根据自己的是非观反对出售武器。
I am strongly opposed to helping the young man addicted to alcohol.我坚决反对帮助酗酒成瘾的那位年轻人。
At first he was opposed to our suggestion, but we managed to persuade him.
起初他反对我们的建议，但我们设法说服了他。be opposed to (doing) sth　　 反对(做)……
as opposed to 与……不同；而不是
oppose vt. 反对；反抗；妨碍
opposing adj. 对立的；截然相反的 I oppose your going there alone.我反对你单独去那里。
We don't oppose the plan at all.
＝We are not opposed to the plan at all.
我们根本不反对这个计划。【单项填空】
①After the professor________out the project，the media focused on it.
A．was opposed to carrying
B．was opposed to carry
C．opposed to carry
D．opposed to carrying
解析　句意：教授反对实施这项工程后，媒体都关注这件事。be opposed to表示“反对……”，其中to是介词，后面跟名词、代词或者动名词。
答案　A②The trade unions in this industry are________any reduction in wages.
A．objecting against B．opposed to
C．reacted to D．resisting against
解析　句意：该行业工会反对降低工资。 be opposed to意为“反对， 对抗”； object against不常用； react to意为“作出反应， 反应”； resist不与against连用。
答案　B5．keep on继续
He kept on ringing me up, but I don't want to keep in touch with him any more.
他不断地给我打电话，可我不想和他保持联系了。
The climbers kept on in the hope of reaching the top with the last effort.
登山队员们继续前进，希望最后一鼓作气地到达峰顶。【比较网站】 keep doing/keep on doingHe kept talking until the meeting was over.
他一直在说，直到会议结束。
The boy kept watching the passing traffic at the gate.
这个男孩在门口不停地看着过往的车辆。
She kept on raising her hand.
她反复举手(不是一直举着手)。
He kept on repeating these words over and over.
他一遍又一遍重复这几句话。选用keep doing/keep on doing的适当形式填空
①He ________ eating/smiling/walking.
他一直在吃/笑/走。
②Don't ________ ________ asking such questions.
不要老是问这样的问题。
③He ________ standing in the rain for 3 hours.
他在雨中坚持站了3个小时。
④They ________ ________ working although they were tired.
他们虽然很疲劳，但还是继续工作。kept　keep on　kept　kept on 6．build up树立，逐步建立；增进(健康)；集结
This built up my hope after the interview.
面试过后增加了我的希望。
The building must have been built up by now.
那幢大楼此时一定已经建成。
She was studying to build up her algebra.
她在学习以提高自己的代数水平。
The movie company has done so much to build up its honour and prosperity.
这家电影公司为宣扬它的荣誉和繁荣做了如此多的工作。build up one‘s health　　　　 增进健康
build up a good reputation 树立良好的声誉
build up the business 扩大企业
build up a picture of... 构思……；设想……
build bridges 沟通 【完成句子】
①He has ________ ________ ________ ________ ________.
他逐步建立了自己的公司。
②Sports and games can ________ ________ ________ ________.
体育运动能增强我们的体质。
③Eventually, these books ________ ________ ________ ________ a fine library.
最终，这些书集聚成为一间很好的藏书室。
④First of all，believe in yourself and ________ ________ ________ __________.
首先，相信自己，增加对自己的信心。 built up his own business　build up ourbodies will build up into　build up your confidence1．There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon.毫无疑问，地球正变得更加暖和。全球变暖是人为的，而不是随意的自然现象。There's no doubt that...意为“毫无疑问……”。本句中doubt接了两个that同位语从句，且第二个同位语从句中又使用了强调句型。
There is no doubt that Libyan have suffered a lot from the war.毫无疑问，利比亚人民因为战争而遭受了很多痛苦。
There is no doubt that radio and television are important means of communication.
毫无疑问，收音机和电视机是信息交流的重要方式。
There is no doubt that he can come on time.
他能按时来是毫无疑问的。(1)doubt作名词
①doubt常与about/of/as to/on等介词连用。
②doubt后面接同位语从句。用于否定句、疑问句时，后跟that从句；用于肯定句时，后面应接whether引导的从句。【温馨提示】
doubt后面的同位语从句，不可以用if替换whether。
(2)doubt作动词，意为“怀疑，不相信”。
①doubt＋名词或代词。
②doubt＋宾语从句。在否定句和疑问句中，doubt后面接that引导的宾语从句。在肯定句中，doubt后面一般接whether或if引导的宾语从句。
There is no doubt that we will be successful.
毫无疑问我们会成功的。There is no doubt that he is the thief.
他毫无疑问就是小偷。
I have my doubt about whether he is the best man for the job.我怀疑他是否是做这项工作的最佳人选。
I don't doubt/have no doubt that he will win the race.
我不怀疑他将赢得比赛。
I doubt the truth of the news.
＝ I doubt whether/if the news is true.
我怀疑这个消息是否是真的。【感悟高考】
—So you gave her your phone?
—________，she said she'd return it to me when she could afford her own. (2011·全国Ⅱ ，20)
A．My pleasure B．Not exactly
C．No doubt D．All right
解析　句意：——如此看来，你把你的手机给了她？——也不完全是这样，她说她能买上自己的手机时就把它还给我。my pleasure(对别人表示感谢的一种礼貌回答)不客气，很乐意效劳；not exactly (纠正对方刚说过的话)不完全是这样；no doubt毫无疑问；all right好吧。
答案　B【完成句子】
①He had his doubts ________ ________ ________ ________ him another chance to have a try.
他不能肯定他们是否会再给他一次机会试一试。whether they would give　②________ ________ ________ they can swim across the river.
我怀疑他们能否游过河去。I doubt whether　③Their acceptance of the contract is still ________ ________.
他们是否接受那合同还说不准。in doubt　④________ ________ ________ ________ he can finish the task on time.
我相信他能按时完成任务。I don't doubt that ⑤He is ________ ________ the cleverest student I've ever taught.
他确实是我所教过的学生中最聪明的。
⑥________ ________ ________ before.
他们以前曾经怀疑过他。without doubtThey doubted him⑦Kate had paid him in advance，which________was a mistake.
A．no more B．no doubt
C．no wonder D．no luck
解析　句意：凯特提前付给他钱，这一点无疑是个错误。no doubt无疑；no wonder难怪。
答案　B2．Even_if we start reducing the amount of carbon dioxide and other greenhouse gases，the climate is going to keep on warming for decades or centuries.即使我们开始减少二氧化碳和其他温室气体的含量，在未来几十年或几个世纪内，气候仍会持续转暖。
even if(＝even though)“即使；尽管”，引导让步状语从句。
Even if you travel in ideal weather, sea journeys will take a long time.
即使你旅行的天气理想，海上旅行所花的时间也较长。We should practice economy even if we are rich.
即使我们富裕了也仍应该厉行节约。
Even if I have to walk all the way I'll get there.
即使一路走着去，我也得赶到那里。
Even if I miss the meeting, what of it?
即使我不出席这次会议，那又有什么了不起呢？【比较网站】 even if / in spite of 【完成句子】
①________ ________ ________ ________ ________， you need not believe him.
即使他这么说，你大可不必相信他。
②________ ________ ________ ________ ________ ________， I would try again.
即使我这次失败了，我还要再试试。
③________ ________ ________ ________ ________ ________ ________ ________，I'll keep my business going.
即使要卖掉房子，我还是要继续我的事业。Even if he said so　Even if I fail this time Even if I have tosell my house