江苏省怀仁中学高一英语 教师版 m2u3语言点
江苏省怀仁中学高一英语 M2U1 语言点(学生版)
江苏省怀仁中学高一英语 M2U1 语言点（学生版）2. Boy missing, police puzzled.男孩失踪, 警察迷惑。
= A boy _________ _______, and the police are puzzled.go missing=go lost : go 连系动词, 意思为“变成某种状态（通常指不好的状态）”如: go mad ( ), go wrong ( ), go bad ( )puzzle v t. 使迷惑，使为难 n. 谜，谜语；难题，困惑（只用单数）puzzl ed adj. 困惑的，茫然的puzzling adj. 令人困惑的be/ feel puzzled about sth.对…感到困惑Lucy looks a little___________. He felt ____________ about the question.The question___________ me. = I was ___________ by the question.（）The __________ look in his face suggested that he_________ that.A. puzzling; hasn’t expecte dB. puzzled; hadn’t expectedC. puzzling; doesn’t expectD. puzzled; didn’t expectpuzzle, interest, surprise, astonish, shock, upset, excite, disappoint, please, satisfy, frighten, amaze, convince 等意思为“使······”的动词都属于同一类，现在分词表主动，可译为“令人······的”，过去分词表被动，表示“（本身）感到······的”1) _______ and happy, Tony stood up and accepted the prize. (2006 全国卷)A. SurprisingB. SurprisedC. Being surprisedD. To be surprising2) Tom sounds ____ very much in the job, but I’m not sure whether he can manage it.A. interestedB. interestingC. interestinglyD. interestedly3) 这个消息很激动人心，所以听到这个消息学生们都很激动。
江苏省怀仁中学高一英语 M2U3 期终复习 下载地址
M2U3 Amazing peopleI．单词拼写1.Don’t d__________ him. He is listening to the weather forecast.2.When living, the E___________ kings had already begun to build tombs for themselves.3.Children are always c__________ about what they don't know.4.Nowadays many people use different fridges to p_________ food and vegetables.5.When the e_______ landed on the island, they discovered that it was full of unknown animals6.He received a large f__________ when his uncle died.7.Much to our surprise, he is the only s_________ of the traffic accident.8.My computer went wrong because it was attacked by some unknown v__________.9.I’m afraid nobody can finis h this task w_________ 20 minutes. I’ll give you half a n hour.10.He m__________ to finish his task by 5 and was allowed to go home.11.All the student s p___________ at the meeting supported the decision.12.We should take a ___________ (科学的) way to test this equipment.13.She has received a w_________ that she will be fired if she is late again.14.The carelessness of the driver r________ in a terrible accident, which killed three people.15.The un iversity also trains __________ (宇航员) for the government.16.There are two ___________ (候选人) for the p ost of manager in the company.17.The results will be put on a notice board at the e__________ to the building.18.What a ____________ (巧合) that I was in Paris at the same time as you.19.Mother Teresa is kind, noble-minded, simple-minded, helpful and peace-loving, and becauseof these good q__________, she won a Nobel Peace Prize..20. Wealth and _________ (地位) are not important to her.21. Only a few people __________ (幸免于，幸存) the earthquake.22. Don't let one failure _______________ (使泄气) you.23. Are you alone or with a ______________ (伴侣)?24. His encouraging words i_____________ confidence in me.25. The animal was still b_____________, so we knew it was still alive.26. Computers are now in w____________ use.27. We are still _____________ (乐观的), whatever the result may be.28. Mountain gorillas are also protected by governments and various __________ (组织).29. This car is s____________ to that one.30. The company has c__________ with a number of Japanese firms.31. A red lamp is used as a danger s____________.32. The boy avoided_____________ (惩罚) by running away.33. Our latest model should meet your___________ (要求).II. 动词填空1.We don’t know what ___________ (do) with these old clothes.2.The dinner last night was the worst meal that we __________ (have), but it was much betterthan what we are having now.3.It ______________ (be) a long time since they last met each other.4.There are a lot of difficult problems in our studies, but we have always managed_____________ (solve) them.5.His _________ (surprise) look suggested that he ______________ (not expect) that he couldwin the first prize.6.He speak French as if he _________ (be) a Frenchman.7._____________ (face) difficulties, you should act bravely.8.If ____________ (take) correctly, the medicine should work.9.There are many well ____________ (preserve) buildings on this small town, which attracta lot of visitors every year.10.D on’t leave the water ____________ (flow) day and night.11.By the end of last year, another new lab _____________ (complete) in our school.12.By the end of next month, we _______________ (build) five new houses.13.From 22nd to 26th next month, I _______________ (visit) some places of interest there.14.She desires you ___________ (come) at once.15.He said he ___________ (pay) a visit to our school the next week.16.With so many people ______________ (communicate) with each other, it will become more andmore important to have a good knowledge of English.17.Before Cai invented paper, he tried __________ (use) m any different parts of trees andplants.18.Cai Lun is a famous Chinese inventor, ___________ (know) for inventing paper.19.No sooner ___________ they __________ (get) home than it began to rain.20.Don’t waste time ____________ (read) such a useless book.III．句型转换1. They went to Shanghai by ship on a rainy morning.They _________ ________ _________ Shanghai on a rainy morning.2. No sooner had he returned home than he was told to go to another country._________ had he returned home __________ he was told to go to another country.3. Yang is an example o f a man who has succeeded i n making his dream a reality.Yang is an example of a man who has _________ ______ _____ _______ _______.4. What is certain, though, is that the ‘curse of the mummy’ remains a riddle.________, ________ _______ _______ that the ‘curse of the mummy’ remains a riddle.5. I’d rather stay at home than join you in the work.I _______ ________ stay at home rather than join you in the work.6. Facts have prove d Yang Liwei is very successful.It ________ ________ that Yang Liwei is _________ ________.Yang Liwei ________ ________ ________ to be very successful.7. Yang Liwei went to space and returned, making the dream a reality.Yang Liwei went to space and returned, ________ _________ the dream a reality.8. If they are breathed in, the viruses can cause illness or even death.If ______ ________, the viruses can ________ _______ illness or even death.9. His respect for others did win him respect from other._______ ________ his respect for others ________ won him respect from other.10. The English language has something to do with German.The English language is ___________ _________ German.11. Let’s ask the workers who attend the meeting, and they will tell us the truth.Let’s ask the workers__________ _______ the meeting, and they will tell us the truth. 12. He told me that the next day he met my friend not long after he arrived.He told me that the ______ day that he met my friend ______ _____ his arrival.13. My grandfather passed away because he got liver failure when he was 69.My grandfather_____ ______liver failure ______ ______ _______ _______ 69.14. He discovered a great fortune in jewels and gold, as well as the preserved bodies.He discovered a great fortune in jewels and gold, ______ _______ the preserved bodies. 15. He arrived at the station, but he found the train had left earlier than expected.He arrived at the station, _______ _______ find the train had left earlier than expected.16. A fall several years ago resulted in the pain in his back.The pain in his back__________ _________ a fall several years ago.IV. 完成句子1. 一些惊奇的人通过他们的思想和行动已经把我们的世界改变的更好。
江苏省怀仁中学高一英语 M3U2 语法 教师版
江苏省怀仁中学高一英语 M3U2 语法教师版2. 引导名词性从句的词，叫连接词。
分为三类1）连接词：that, whether, if, as if(as though)2）连接代词：what, whatever, who, whoever, whom, whomever ,whose, which, whichever 3）连接副词：when, where, how, why3. 名词性从句的语序：陈述句语序We’ve heard the news that we’ll move in to the new house.Whatever you say will interest us all.He asked me what was the matter with me.4．注意：1) that的省略 2）whether和if的用法 3)同位语从句和定语从句的区别.II．疑问词引导的名词性从句：疑问词有两类，即疑问代词(what, whatever, which, whichever, who, whoever, whom, whomever, whose) 和疑问副词(when, where, how, why), 后接陈述句式. 注意点：1) 疑问代词 + ever和no matter + 疑问代词的区别。
①疑问代词 + ever可引导名词性从句，在从句中要充当一定的部分。
如：Whoever breaks the rule must be punished.You can choose whatever you like in the shop.②疑问词 + ever还可引导让步状语从句。
如：Whoever breaks the rule, he must be punished. Whatever you do, you must do it well.③no matter + 疑问词只能引导让步状语从句。
江苏省怀仁中学高一英语 M4U2 期末复习教师版
一、单词拼写：1.The teacher explained to us the significance of learning English well2.We attended a great ceremony when we graduated from the university.3.He had to make up his lessons because of several weeks’ absence (缺席)4.The boy was delighted with the present when he was told it was for his birthday.5.Nowadays, many places in this province have developed into tourist attractions.6.To reduce the pollution in our city, we’d better travel by public transport.7.In order to join the club, you should meet all the necessary requirements.8.The prisoners attempted to escape but failed.9.The young was awarded a medal for coming first in the race.10.Over a hundred candidates competed for the position. People were very curiousabout who would get it.11.There are seven continents on the earth, among which Oceania is the smallestone.12.Yesterday my friend had a high fever; otherwise, he could have gone to school.13.All the boys playing there belong to Football Association (协会)14. My mother told me to remove dirty dishes from the table after supper.15. I had the honour of presenting the awards to the winners at the ceremony.16. I try to keep in frequent contact with my child.17. The gift is very precious because it is given by my grandmother.18.He is an outstanding boxer and will probably become a champion (冠军)19. It is a tradition_(传统) that the young look after the old in their family.20. The meeting will begin in 10 minutes, meanwhile (在此期间) we can sing a few songs.二、动词填空：1.You had better get the car running (run).2.These medicine must be checked before being used (use)3.The news we had been looking forward to came (come)at last.4.I’m sorry to have kept (keep) you waiting for such a long time.5.I wish to be sent (send) to work in the country.6.I’m afraid that your son was involved (involve) in the accident yesterday.7.He plays basketball very well. He must have practised (practise) it a lot.8.------Where is Johnson? I can't find him anywhere.------He must be writing_(must write) letters upstairs.9.She looks very sad. You shouldn’t have told_(tell) her the bad news.10.This is the product our manager wants to see advertised_(advertise) in adifferent way from the ones of a similar kind.11.Smoking is a major factor contributing_ (contribute) to cancer.12.They are not allowed to park (park) in the street; it's too narrow.13.If _offered_ (offer) help, they will be able to finish the work ahead of time.14.You can hardly imagine what difficulty they had co llecting (collect) enoughevidence to prove the case.15.The confusing situation of the chess game really confused every member in thegame-watching room. (confuse)16.Mrs. White was glad to see the nurse looking (look) after her son and herdaughter and was also pleased to see children well taken (take) care of in the nursery.17.Jack’s umbrella requires repairing_, but he didn’t get it repaired soonenough at John’s, for John had a lot of umbrellas to repair at the time.(repair)18.I told my parents that I was determined (determine) to go to college afterhigh school.19.He left his hometown ,_determined (determine) never to come back.20.Accused (accuse) of taking bribes（行贿）, he was sentenced to death.21._Follow___(follow) his advice, and you will learn a lot.22._To arrive__ (arrive) home before dark, they set out early.23.Can you imagine him doing_(do) a thing like that?24．Please wait a moment, madam. Your coat is being washed (wash)in the laundry.三、句型转换1. We are not allowed to smoke here.They _don’t allow smoking ____ here.2. The boy went to see his grandparents every two weeks.The boy went to see his grandparents ___every other/second week___.3. We sometimes find that it is hard to decide which words or phrases to use. We sometimes __find it hard to decide___ which words or phrases to use.4. The prisoners attempted an escape from the place where they were kept, but they failed.The prisoners __attempted to escape__ from the place where they were kept, but they failed.5. I have cooked a special meal to show respect for our guests.I have cooked a special meal _in honour of ___ our guests.6. Einstein, who discovered the theory of relativity, contributed g reatly to science.Einstein, who discovered the theory of relativity, _made great contributions to science.7. The headmaster wi ll come back and bring us some very significant news.The headmaster will come back and bring us some news of great significance_. 8. The People’s Republic of China returned to the Olympic Games after it had been absent from the Games for 32 years.The People’s Republic of China returned to the Olympic Games after 32 years’absence_9. When parents take part in their children’s education, the children are often more successful.When parents __are involved in __their children’s education, the children are often more successful.10. He didn’t turn up until it struck 8 o’clock.It was _not until__ 8 o’clock _that_ he turned up.11. I’m surprised that he didn't even know the differences between British and American English._It_ surprised me __that _ he didn't even know the differen ces between British and American English.What__ surprised me _is that __ he didn't even know the differences between British an d American English.To my surprise_, he didn't even know the differences between British and American English.四、完成句子：1.I’m delighted to have been invited (已被邀请) to your school to talk to you about the history and significance of the Olympic Games.2.Today athletes from around the world can take part, no matter what nation they come from _(无论他们来自什么民族 ).3. To protect yourself from ( 为了保护自己免受 )possib le da ngers, you mustn’t drink before swimming.4.We recommend that all athletes in training follow these rules ( 遵循这些规则 ).5. In order for a new sport to be added _( 增加 ),a current sport must be dropped.6. I am sure the whole of China must have felt proud ____(肯定感到自豪)when Xu Haifengwon the first medal for his country.7. He dreamt that the Olympics would make it possible _(使得……成为可能) for people of all countries to live side by side in peace.8.Many people enjoy playing different sports _ while____(然而) others just enjoy watching them.9. What we do know __(我们的确知道的是)is that it began in England in the 1890s.10.Many people believe table tennis is not only _(不仅) a physical game but a psychological game as well _(也，又).11. If I were you, I wo uld certainly go to the football match instead of _(而不是) doing work at home.12.It was a Frenchman, Pierre de Coubertin, who brought __ the Olympics back to life _(让奥运会得以重生).13. At the 2004 Athens Olympic Games, Liu Xiang excited people all over Asia when he_ became the first Asian to（成为第一个…的亚洲人）win the gold medal in the men’s 110-metre hurdles.14. 他对这场比赛的胜利起了重要作用。
江苏高中英语模块一第三单元知识点总结
Unit3work out（1）锻炼；消耗完（精力）（2）演算出、制定出Y ou can keep fit by working out regularly. 你可以通过有规律的锻炼来保持健康。
It was so difficult a problem that no one could work it out. 这个题目如此难，没有人能算出。
They spent a whole night working out the plan. 他们花费一整夜制定出了计划。
stay vi. 保持；处于stay还可以后接形容词、过去分词等作表语，说明主语所处的状态。
如：The supermaket stays open until 10 p.m every day.这家超市每天营业到夜间10点。
Some girls want to stay slim by taking weight-loss pills. 有些女孩想服用减肥药来保持苗条。
figure n. 体形；数字v.The girl has a good figure, which makes others envy her...这女孩身材好, 这使得别人嫉妒她。
figure on指望；figure out “计算出；领会”。
We figured on your coming early.我们指望你早点来。
They’ve figured out the best way to solve the problem.他们已有了最佳解决办法。
weight n. 重量；体重What’s the weight of each bag.每袋重多少？put on weight增肥；lose weight减肥。
v. weigh, “称……的重量”或“（某人/物）重达……”。
The biggest elephant in the world weighs nearly 5 tons. 世界上最大的象重近五吨。
江苏省怀仁中学高一(下)英语 M3U2《Language》 词组和句子
一、短语1.从广义上讲_____________ _______________2.语言的各种形式_______________ ____________3.代表___________ ____________4.通知某人某事 ___________ ____________5.分享______________ ____________6.贯穿历史___________ ____________7.由…组成__________ ______ /________________组成，化妆，编造，弥补，和好___________ ___________8.这就是…的原因______________ ___________ _9.使人们困惑_____________ __________ _10.与…不同___________ /_______________________________11.以…命名_______________ _________12.除…之外___________ _________13.混合___________ ________14.成为英格兰的官方语言_______________ _________15.对…感到困惑______________ _______16.有着相似的意思_____________ _____17.在…的发展中起着作用_________________________ _______18.击败英格兰_______________ ________19.控制，接管 ___________ 失去对…的控制___________20.导致___________/_____________ 由… 引起___________21.代替英语成为第一语言_________________22.一方面…,另一方面…23.作为仆人24.饲养动物______________25.对…作出贡献________________26.把…增加到…中_____________27.开始广泛使用_______________28.经历巨大变化_____________________29.…是确定的 __________________30.获得独立 __________________31.依靠，取决于，视…而定___________ 看具体情况而定___________32.立刻处理这个问题________________33.考虑我的建议34.查每一个单词35.值得仔细思考___________________36.为…设定标准_______________37.非常关心__________________38.曾经,一度39.导致语言污染_____________________________________________________40.使其他人尴尬或恼火__________________41.可从网上得到____________42.而不是43.可能做某事______________44.总之__________________________/_____________45.在于___________46.在许多情况下47.用不同的形状来代表不同的物体__________48.作为整体，总体上___________49.转变成_____________50.区分…很容易 ____________________51.互为相反_________________________________________________________52.缺点之一______________________53.推广简化汉字________________________54.三岁时由于受伤失明___________55.压在金属线上的纸___________56.重达100磅________________57.在某人方便的时候做某事__________________________________________在您方便时________________________________________________________58.凸起的圆点 _________________________59.用手指感觉 _________________________60.有实际用途的________________61.从事，努力，完善________1．从广义上说，语言是表达信息的方式。
江苏省怀仁中学高一英语 M3U3 语言点讲义(学生版)
a) I’m meeting you after class.b) What are you doing next Sunday?(2) be known as/ for/toa) Wuxi its clay figures (泥人).b) Yang Liwei the first astronaut of China.c) He is a national hero almost every family.2. In 89BC，the Romans took over Pompeii. take over接管Our chairman has left, so Peter . 彼特将接任他的工作. take on 呈现 take down 写下记下 take up占据（时间，空间）；开始;从事take off 起飞, 脱下 take in 接受；吸收；理解；欺骗a) We find it difficult to English grammar.b) When did the plane ?c) In the last ten years, our hometown a new look.d) The heavy work all of Sunday.e) I can phone him because I his telephone number.3.Near the city was a volcano. (全部倒装句)= Eg. Near the earth is a s atellite called the moon.Out came those exited boys.Here comes the bus.Translate: 山顶上立着一座庙。
.4. Many people were buried alive and so was the city. How unfortunate! (1)bury (vt)埋葬,安葬,埋 burial n 埋葬He was buried in his hometown.他被埋葬在他的故乡The house was buried under snow.房子被埋在雪下.be buried in =bury oneself in 埋头于…，专心于…a)简总是埋头工作。
江苏省怀仁中学高一英语 M4U3 语言点教师.doc
江苏省怀仁中学高一英语 M4U3 语言点教师2. Not only will he or she feel every step of climbing Mount Qomolangma, but the user willalso experien ce the cold, smell, sights and sounds of the surrounding environment.= He or she will not only feel every step of climbing Mount Qomolangma,…归纳：1) not only A but also B ＝ B as well as A2) not only提到句首，not only所在分句用部分倒装3) but also中的also也可省去；but also也可换为but．．．as well4) not only．．．but also．．．连接并列主语时，谓语遵循“就近原则” He lik es Chinese as well as English. 他不但喜欢英语，也喜欢汉语。
=He likes _not_ __only_ __English_ __but__ __also_ _Chinese__.=He likes not only English but Chinese __as__ __well_.=Not only _does_ __he__ _like_ English, but also _he_ _likes_ Chinese.Not only I but also she _likes_ (like) pop music.Not only you but also he __has_ (have) to leave.She not only sings like an angel, but also dances divinely.= Not only _does_ _she_ __sing_ like an angel, but she also dances divinely.我们不仅应记住生词，而且还要会正确使用。
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"江苏省怀仁中学高一英语教师版 m2u3语言点 "Welcome to the unit:1. have an effect on 对…有影响 effect(n), effective (adj), _effectively_(adv)eg. Alcoholic drink can _have a bad effect on__ your health. 对你的健康有害The government action _had no effects on the trade imbalance. 对…无影响be of no effect 无效，没有作用，不中用 carry sth into effect 使生效，实现put sth into effect 实行，实施 co me into effect 开始生效Reading:1. curious(1) curious adj.好奇的；求知欲强的；奇特的Children are curious about everything around them. I am curious to know what he said.I’m curious how he will do it. It is curious that she left without saying goodbye.归纳用法：_ be curious about be curious to do _be curious +O-clause It is curious that(2) curiously adv.好奇地；稀奇古怪地Philip looked curiously at the people. 他好奇地看着人们。
(3) curiosity n. [u.]好奇感, 求知欲，好奇心in/ with curiosity 好奇地（相当于curiously）； out of/ from curiosity 出于好奇心1) Philip looked at the people in/with curiosity. 他好奇地看着人们。
2) He kept asking me numerous questions about it out of / from curiosity.出于好奇，对那件事他问了我许多问题。
(4) curiosity n. [C.]希奇的事；珍品This red and yellow striped seashell is quite a curiosity. 这个红黄相间的贝壳是件珍品。
2. discovery(1) discovery n.[c.] 发现1) Scientists made a lot of amazing scientific discoveries in the twentiethcentury.科学家们在二十世纪作出了许多惊人的科学发现。
2) She was shocked at the discovery that he was a thief. 她震惊地发现他原来是个贼。
(2) discover vt.发现(发现世界上原本就存在的事物)区别：invent vt.发明（发明世界上原本不存在的事物）1) Christopher Columbus discovered America in 1492. 哥伦布于1492年发现了美洲大陆。
2) Alexander invented the telephone. 亚历山大发明了电话。
(3) discoverer n. [c.] 发现者1) It was Madame Curie who/ that first discovered radium. 是居里夫人首先发现了镭元素。
2) Madame Curie is well known as the disco verer of radium. 作为镭元素的发现者而出名。
3. as well as(1) as well as 同样；也；以及（用于连接两个并列的成分；相当于not only… but also但as well as强调的是它前面的内容，而not only… but also强调的是but also 部分的内容。
当as well as 用来连接两个名词作主语时，句中谓语动词的形式必须与前一个名词一致。
）1) John can speak Chinese as well as French. 约翰不仅能讲法语而且能讲中文。
2) It’s important for you as well as for me. 这不仅对我而且对你也很重要。
3) Lily as well as her classmates was disappointed when they knew their team failed.(2) as well同样；也（相当于副词too）1) I’m going to London and my sister is coming as well/too. 我将去伦敦，我的妹妹也要去。
2) She can ride a horse and swim; she can shoot as well/ too. 她会骑马和游泳，她也会射击。
3)他除了给我忠告外，还给我钱。
He gave me money as well as advice.=He gave me advice, and money as well.4. present（1) adj.出席的，在场的； be present at…出席/ 在场……people present 在场的人们 (指“出席的或在场的”意思作定语时，常作后置定语)1) How many people were present at the meeting？有多少人出席了那次会议？2) He was pleased at seeing so many people present. 他很高兴地看到那么多人在场。
3) It was unfair to discuss his case if he was not present.如果他不在场4）All the people present are discussing the problem.所有到场的人们adj. 现有的,现存的(作定语时常前置)当前政府present government ; 目前的情况present situation(2) n.礼物 (相当于gift)；birthday presents(3) n.现在，目前 at present 目前At present we are living in Richmond. 目前我们住在里士满。
(4) vt.呈现；递交；赠送;介绍，引见;present sth. to sb. 把某物递交给某人（也可以用present sb. with sth. 来表示）1) They presented flowers to their teacher. 他们把花送给了老师。
2) The latest development presents a pro blem. 最近的发展呈现出一个问题。
3)The characters in the novel are vividly presented._________________________ 5. result(1) result vi.结果，导致 result in/ lead to导致； result from…由……而引起/产生；起因于1) His carelessness resulted in/ led to the traffic accident. 她的粗心导致了那次交通事故。
2) The traffic accident resulted from his carelessness. 那次交通事故是由于他粗心引起的。
(2) result n. [c]/ [u] 结果；效果the results of a competition 竞赛的结果; work without much result 没有效果的工作as a result 因此, 结果； as a result of 作为……的结果；由于……He was late for class_ as a result of ___ the heavy rain.= It rained heavily; as a result, he was late for class.6. certain(1) certain adj.确定的, 肯定的 (近义词：sure )be certain about/ of…/ b e sure about/ of…确信某事；对某事有把握be certain/sure to do…务必会做……；一定会做……1) You must be certain/ sure of / about the facts. 你必须对这些事实很确信。
2) He is certain/sure to return. 他肯定会回来的。
(2) be certain/ sure + that... 相信; make certain/ sure that …确保/确信1）We are certain/ sure that he will get over his illness. 我们肯定他会康复的。
2) I was not certain/sure whether he would come. 我不能确信他是否会来。
3) I stayed long enough to make certain/sure that the house was absolutely empty.我在那呆得久一些以确保那房子确实是空的。
(3) It’s certain that…是肯定的(在此句型中不能说：It’s sure that …)for certain / for sure肯定地1) It’s certain that he will win the election. 他肯定会赢得这次大选。
2) I cannot say for certain/sure when he will arrive.我不能肯定地说他何时能到达。
7. pay off(1) 成功，带来好结果; 是值得的，没有白费1) All my years of training as an explorer have finally paid off.那为成为探险家训练多年所付出汗水最后终于得到了好结果。