9BUnit1复习提纲
(完整版)9BUnit1-4整理归纳
9B Unit 1-49B Unit 1 Asia四会词组：1.have/take a break/rest 休息一下2.keep moving 继续前进3.on one’s way back 在…回来的路上4.in the middle of 在…的中心5.be (well) worth visiting/ a visit 值得参观6.hang down 悬挂下来7.the raising of the national flag 升国旗8.be praised as/ to be…被赞扬为…/被誉为…9.across northern China 横贯中国北方10.in different shapes 不同形状地…11.art treasures 艺术瑰宝12.take up 占…的面积13.provide a high level of service 提供一个高级别的服务14.leave for 动身出发去某地15. a city state 一个城市型国家16.the second largest population 第二大人口数四会句型：1.I t’s tiring to climb the steps, and my feet hurt.爬台阶很累人，我的脚疼。
2.We had better keep moving.我们最好继续前进。
3.Thank you for your advice/ suggestion.谢谢你的建议。
4.With wonderful buildings and art treasures inside, it is well worth a visit.它里面有宏伟的建筑和艺术珍宝，非常值得一游。
5.It runs for over 6000 kilometres across northern China, with watchtowers every few hundredmetres. 它（长城）在中国北部地区绵延6000多公里，每隔几百米设有瞭望塔。
9BUnit1知识点归纳
9BUnit1知识点归纳一、重点词汇1、 at the moment 目前，此刻常用于现在进行时，表示当前正在进行的动作或状态。
例如：I'm busy at the moment （我此刻很忙。
）2、 used to do sth 过去常常做某事强调过去的习惯或动作，但现在已经不再这样了。
例如：He used to play football after school （他过去放学后常常踢足球。
）3、 be used to doing sth 习惯于做某事表示现在已经适应并习惯了某种状态或行为。
例如：I'm used to getting up early （我习惯了早起。
）4、 on one's own 独自相当于 alone 或 by oneself 。
例如：She lives on her own （她独自生活。
）5、 space station 空间站例如：Scientists are working on the space station （科学家们正在空间站工作。
）6、 be afraid of 害怕后接名词、代词或动名词。
例如：I'm afraid of dogs （我害怕狗。
）7、 look forward to 盼望，期待其中 to 是介词，后接名词、代词或动名词。
例如：I'm looking forward to seeing you （我期待见到你。
）二、重点短语1、 take off （飞机等）起飞；脱下（衣服等）例如：The plane took off on time （飞机按时起飞。
）He took off his coat （他脱下了外套。
）2、 as well 也，又通常用于句末。
例如：He likes music, and I do as well （他喜欢音乐，我也喜欢。
）3、 be able to 能够强调通过努力或具备某种能力而能够做某事。
牛津译林版9BUnit1复习课件
目录
• 单元概述 • 词汇和语法复习 • 课文内容回顾 • 练习与巩固 • 模拟试题与解析 • 答案与解析
01
单元概述
单元主题
探索自然与人类的关 系
探讨环境保护和可持 续发展的问题
了解不同地区的自然 景观和人文特色
单元目标
01
02
03
04
掌握本单元的重点词汇和表达 方式
在此添加您的文本16字
填空题3答案：red
在此添加您的文本16字
解析：根据上下文，此处需要填写颜色的名称，而 “red”是颜色的常见名称之一，因此是正确的答案。
阅读理解答案与解析
阅读理解1答案：B
01
解析：B选项是正确的，因为
它与文章中的描述相符。其他
选项与文章内容不符。
02
阅读理解2答案：C
03
重点短语
总结词
常用、固定搭配
详细描述
本单元的重点短语包括“make sense”、“in order to”、“be similar to” 、“be proud of”等，这些短语是英语中的固定搭配，熟练掌握后能够提高语 言表达的准确性和流畅性。
语法点梳理
总结词
核心、高频
详细描述
本单元的语法点主要包括宾语从句、表语从句、同位语从句等，这些语法点在英语中非常重要，也是考试的高频 考点，需要深入理解并熟练掌握。
理解课文内容，提高阅读理解 能力
培养学生对自然和环境的关注 和保护意识
提高学生的语言表达能力，包 括口头表达和书面表达
02
词汇和语法复习
重点词汇
总结词
重要、常考
详细描述
本单元的重点词汇包括但不限于“attitude”、“argue”、“persuade”、 “promise”、“doubt”等，这些词汇在考试中经常出现，需要重点掌握其用 法和含义。
译林牛津版9B Unit 1 Asia复习提纲
9B Unit 1 Asia 单元知识总结1.tiringadi.使人疲劳的,累人的It’s tiring for sb to do sth.2.stepn.台阶:梯级It’s tiring to climb the steps ,and my feet hurt.n.步伐One small step for(a)man, one giant leap for mankind.n. take some simple stepsHere are some simple steps to take.Vi 走，跨步stepped--steppingstep out onto the Moon' surface3.take a rest休息一下4.chopsticks n.筷子(复数) a pair of chopsticks 一双筷子5.We'd better keep moving.我们最好一直走。
6.on one's way back to Sp.在某人回去的路上on one's way back home /thereWake me up on your way back.7.Thank you for your suggestions.谢谢你的建议.8.raisingn 升高watch the raising of the national flag. 旗帜raise 饲养The farmers raise some cows and ducks.vt.举起, 提起(及物)He raised his hand catch my attention.rise vi.(不及物)上升,升起Prices are rising all the time.The sun rises in the east and sets in the west.Sunrise sunset9.wondern.奇迹It is one of the wonders of the world.它(长城)是世界奇迹之一v.想知道=want to know(接if/whether/wh-/how 引导的从句) wonderful adj ----adv wonderfullyhave a wonderful/great/ good/ fine /fantastic /nice time doing sth have fun doing sthIt is great fun to do sthWhat great fun to play football it is ！What great fun/a good time playing football we had yesterday! 10.liev.位于lie-lay-lainIt lies on the two sides of the Lijiang River.它(桂林)位于漓江的两岸.11.shapen.形状,外形in unusual shapes奇形怪状be in good shape/ out of shapeMountains stand in different shapes.v.塑造It is you who shape your life and future.12.underground adj.地下的an underground cave一个地下洞穴洞in this underground cave在这个地下洞穴里n.地铁at the exit to the underground 在地铁的出口处13.hangv.垂下:悬挂(hang -hung-hung) hang down 向下垂着==反义词point upwards(vi) sth hangThe curtain hangs.(vt) sb.hang sth.Millie hangs the curtain.=The curtain is hung by Millie.绞死hanged ---hangedHe will be hanged tomorrow.14.point v.指,指向point upwards 向上指着n.分数score 20 pointsmain points 要点What's the point of…..?15.eastern adj.东部的western northern southernin the southern part of =in the south ofin East China = in the eastern part of Chinan./adj./adv.东南方south-west north-west north-east south-east16. with wonderful buildings and art treasures inside,it is well worth a visit.它(故宫)里面有宏伟的建筑和艺术珍室,非常值得一游17 In the north-west of Beijing is the Summer Palace, a large Chinese garden set in a natural Iandscape.颐和园在北京城的西北部,是一个自然景观为背景的大型中国园林18. It runs for over 6,000 kilometres across northern China ,witht watchtowers every few hundred metres. 它(长城)在中国北部地区绵延6000多公里,每隔几百里设有晾望塔。
9BUnit1复习提纲
9B Unit 1 词组、句型及语法复习提纲、词组或短语I.How do you like life on Mars?= What do |you th^k of f on Mars? 2.1thought you liked Mars.我原以为你喜欢火星。
3.Daniel is thinking about What llife will [be like I in the future.4.It may be difficult to imag ine.5.0ur pla net. Earth, is beco ming more and more crowded and polluted .6. At prese nt, our spacecraft are too_ slowly to_carry large nu mbers of people to Mars —it takes mon ths.7. By 2100, the journey might take only a very short time in space shuttles （that travel at half the speed oflight .）8. Huma ns need food, water and air tb survive?9. However, it is not surejf these pla nts, could produce water.10. The gravity on Mars is only about three-eighths of the gravity on Ea”h.★ll.There will be many different desig ns for settlers to choose from L12.Every student will have a computer at home （ connecting to an inter-planet computer network.）13.1 am won deri ng if/whether there will be ma ny people willing to move to Mars.14：We could [get ill from | livi ng there.15【50% of the, stude nts would like to move out of Earth.16.lt worries me.★17. It would be great to Ihavel robots Id3 all the work for us.18. H takes Mars about two years to revolve completely around the sun19. The surface of Mars is more like the surface of Earth than any other planet in our solar system.20. A very popular form of en terta inment is online games.21. Things from Earth are hard to find. = It is hard to find thing from Earth.22.She's too n ervous ©relax.23. Robots could beto live on Mars ].机器人可能是第一批生活在火星上的（人）。
9B Unit1 Southeast Asia 知识点归纳
9B Unit1 Southeast Asia 知识点归纳9B Unit1 东南亚知识点归纳
本文档将对9B Unit1中关于东南亚的知识点进行归纳。
东南亚地理
- 东南亚由多个国家组成，包括印度尼西亚、泰国、马来西亚、菲律宾等。
- 东南亚地区地势复杂，包括平原、高原和火山山脉等地形特征。
- 东南亚地区气候炎热潮湿，有明显的雨季和旱季。
东南亚的人口和文化
- 东南亚地区是人口密集的地区，拥有众多不同族群和文化的
人民。
- 东南亚主要宗教有、、教等多种宗教。
东南亚的经济
- 东南亚地区经济发展迅速，是世界经济增长的重要引擎之一。
- 东南亚的经济主要依靠农业、工业和服务业。
东南亚的环境问题
- 东南亚地区面临许多环境挑战，如森林砍伐、水污染和气候
变化等。
- 许多国家正在采取措施来解决这些环境问题。
东南亚的旅游业
- 东南亚地区以其独特的自然景观和文化吸引了大量的游客。
- 泰国的清迈、印度尼西亚的巴厘岛和越南的下龙湾等都是著
名的旅游胜地。
以上是9B Unit1中关于东南亚的知识点的简要归纳，希望对您有所帮助。
9BUnit1知识点归纳
9BUnit1知识点归纳一、重点词汇1、 population“population”作名词，意为“人口；人口数量”。
例如：The population of this city is increasing rapidly （这个城市的人口在迅速增长。
）表示“某地的人口数量是”时，常用“ The population of ＋地点＋ is ＋数字”的结构。
2、 tourist“tourist”作名词，意为“旅行者；观光者；游客”。
例如：There are many tourists in this city every year （每年这个城市都有很多游客。
）3、 quarter“quarter”作名词，意为“四分之一；一刻钟”。
例如：A quarter of the students in our class are from the countryside （我们班四分之一的学生来自农村。
）It's a quarter past eight （现在是八点一刻。
）4、 until“until”作连词和介词，意为“直到为止”。
例如：I will wait here until you come back （我会在这里等，直到你回来。
）He didn't go to bed until 12 o'clock last night （他昨晚直到 12 点才睡觉。
）5、 whenever“whenever”作连词，意为“无论何时”。
例如：You can call me whenever you need help （无论何时你需要帮助都可以给我打电话。
）6、 on business“on business”是一个固定短语，意为“出差”。
例如：He has gone to Shanghai on business （他去上海出差了。
）7、 so far“so far”是一个固定短语，意为“到目前为止；迄今为止”，常与现在完成时连用。
9BUnit1知识点
9B Unit 1 Asia 知识点总结一, 重要词组或短语1.continue to the end 坚持到最终2.take a rest 休息一下3.wake me up 叫醒我4.on one’s way back在某人回去的路上5.Chinese paper cut 中国剪纸6.dragon dance 舞龙7.get lost easily 简单迷路8. the capital of ……的首都9.be attracted by …被……吸引10.the beautiful design of the buildings 建筑群的精致设计11.a gate of heavenly peace 天界平安之门12.be filled with tourists 挤满游客13.watch the raising of the national flag 观看升国旗（仪式）14.a famous Chinese-stlye garden 一个闻名的中国式园林15.spend the summer 避暑16.consist of /be made up of 由……组成17.a man-made lake 一个人工湖18.all over the area 遍及这个地区19.run more than 5,000 kilometres across northern China 横跨中国北方绵延5000多里20.one of the wonders of the world 世界几大奇迹之一21.exerience its beauty and greatness 体验它的美和宏大22.step by step 一步一步地23.in the south of China 在中国的南部24.lie on the two sides of Li River 座落在漓江两岸25.in different shapes 形态各异26.in strange shapes 奇形怪状27.see ... with one’s own eyes 亲眼所见28.take a boat trip along Li River 乘船沿漓江巡游29.be open to the public 向公众开放30.at sunrise 在日出时刻31.get hot and sweaty 又热又流汗32.every five minutes 每五分钟33.in a hurry 匆忙地34.leave Japan for other Asian countries 离开日本去亚洲其他国家35.public transport services 公交设施36.wish sb. a nice trip 祝某人旅途开心二, 重点句子及句型：1.Beijing is in northern China. 北京在中国的北部。
9B Unit 1-4整理归纳
9B Unit 1-49B Unit 1 Asia四会词组：1.have/take a break/rest 休息一下2.keep moving 继续前进3.on one’s way back 在…回来的路上4.in the middle of 在…的中心5.be (well) worth visiting/ a visit 值得参观6.hang down 悬挂下来7.the raising of the national flag 升国旗8.be praised as/ to be…被赞扬为…/被誉为…9.across northern China 横贯中国北方10.in different shapes 不同形状地…11.art treasures 艺术瑰宝12.take up 占…的面积13.provide a high level of service 提供一个高级别的服务14.leave for 动身出发去某地15. a city state 一个城市型国家16.the second largest population 第二大人口数四会句型：1.I t’s tiring to climb the steps, and my feet hurt.爬台阶很累人，我的脚疼。
2.We had better keep moving.我们最好继续前进。
3.Thank you for your advice/ suggestion.谢谢你的建议。
4.With wonderful buildings and art treasures inside, it is well worth a visit.它里面有宏伟的建筑和艺术珍宝，非常值得一游。
5.It runs for over 6000 kilometres across northern China, with watchtowers every few hundredmetres. 它（长城）在中国北部地区绵延6000多公里，每隔几百米设有瞭望塔。
中考牛津英语9B复习讲义
牛津英语9B Unit 1 复习讲义一、重点词汇1. can,could,may,might表示许可can / could / may / might均可表示许可，只不过may较侧重讲话人的许可，而can较侧重客观情况的许可；could / might的语气比can / may更委婉、客气；在答语中表示允许别人做某事要can / may，不能用could / might。
如：--Could [Can, May, Might] I use it? 我可以借用它吗?-- Yes, you can [may]. 可以。
（不用could / might）must表示必须作某事，其否定式mustn’t表示“不可以”。
如：We must not speak of it again. 我们再也不要谈这事了【小试牛刀】1.--Could I use your dictionary? --Yes，of course you __________.A. canB. couldC. mightD. must2. --It’s such a long way! What shall I do? --You________take my car if you want(2010河南省)A. willB. mustC. mayD. shall3. -- _____ I use your ruler, Lingling? -- Sure. Here you are.( 2010桂林市)A. MayB. WouldC. NeedD. Must2. 宾语从句(1) 定义：用作宾语的从句叫宾语从句。
宾语从句可以用连词that，连接代词who，whom，what，which；连接副词how，when，where以及if和whether引起。
连接代词和连接副词在宾语从句中作一相应的句子成分，if或whether表示疑问，而that没有意义仅起连接作用。
9B Unit1 North America 知识点归纳
9B Unit1 North America 知识点归纳
本文档将对9B Unit1 North America单元的知识点进行归纳和
总结。
以下是本单元的重点内容：
1. 地理信息
- 北美洲位于西半球，包括美国、加拿大和墨西哥等国家。
北
美洲是一个多元化的地区，拥有丰富的自然资源、多样的气候和悠
久的历史。
北美洲位于西半球，包括美国、加拿大和墨西哥等国家。
北美洲是一个多元化的地区，拥有丰富的自然资源、多样的气候和
悠久的历史。
2. ~~法律系统~~
3. 文化特点
- 北美洲的文化多样性是其显著特点之一。
美国和加拿大是移
民国家，人口来自世界各地，因此拥有丰富多元的文化，包括宗教、语言、艺术和音乐等方面的多样性。
墨西哥则有深厚的印第安和西
班牙传统文化。
4. 自然地理
- 北美洲拥有丰富的自然景观，包括大草原、沙漠、高山和湖泊等。
著名的地理特征有五大湖、科罗拉多大峡谷、尼亚加拉瀑布等。
5. 经济发展
- 美国和加拿大是发达国家，经济相对较发达。
美国是全球最大的经济体之一，拥有强大的制造业、金融业和科技行业。
加拿大是资源丰富的国家，其主要经济领域包括农业、能源和旅游业。
以上是9B Unit1 North America单元的主要知识点归纳。
希望对你的学习有所帮助！。
9BUnit1Asia知识点归纳
9BUnit1Asia知识点归纳译林英语9B Unit1知识点归纳Welcome to the unit1.一个亚洲的国家an Asian country2.爬台阶很累人It’s tiring to climb the steps3.休息一下have/take a break/rest4.有很长一段路要走There’s a long way to go5.最好继续前进had better keep moving6.把我叫醒wake me up7.在你回来的XXX-cutting11.一双筷子 a pair of chopsticks12.舞龙dragon dance13.一种传统的XXX.谢谢你的建议Thank you for your advice/ suggestions15.背诵漫画Reading1中国的首都the capital of China2在这座古老的城市的中心in the middle of the ancient city3被改造成一个博物馆be turned/ changed into a museum4值得参观（2种）be（well）XXX5最大的城市广场XXX6一大早聚集在那里看升国旗gather there early in the morning to watch the raising of the national flag7横贯中国北方六千多公里run for over 6,000 XXX每隔几百米就有烽火台with watchtowers every few hundred metres9世界奇迹之一one of the wonders10位于漓江的两侧on XXX11分歧外形的耸立XXX12一个地下溶洞an underground cave13奇形怪状in XXX14悬挂下来hang down15指向上方point upwards16被颂扬为。
/被誉为。
XXX搭船沿着。
9B Unit1 Africa 知识点归纳
9B Unit1 Africa 知识点归纳1. Introduction to Africa- Africa is the second largest and second most populous continent in the world.- It is home to diverse ethnic groups, cultures, and languages.- Africa has a rich history and is known for its ancient civilizations, such as Egypt and Axum.2. Geography of Africa- Africa is divided into five main regions: Northern Africa, Western Africa, Eastern Africa, Central Africa, and Southern Africa.- The continent has diverse geographic features, including deserts, mountains, rivers, and savannahs.- The Sahara Desert is the largest desert in the world and is located in Northern Africa.3. Wildlife and Conservation- Africa is famous for its unique and diverse wildlife, including elephants, lions, giraffes, and zebras.- Many national parks and reserves have been established across Africa to protect its wildlife and promote conservation.- The poaching of animals, such as elephants for their ivory, continues to be a major challenge in Africa.4. African Cultures- Africa has a rich cultural heritage with various traditions, rituals, music, dance, and art forms.- Traditional African religions, Christianity, and Islam are the major religions practiced in Africa.- The influence of African culture can be seen in various aspects of life, including clothing, cuisine, and festivals.5. Challenges and Opportunities- Africa faces several challenges, including poverty, political instability, and lack of access to basic services like healthcare and education.- However, Africa also presents great opportunities for economic growth, investment, and development.- Many African countries are experiencing rapid urbanization and technological advancements.6. Famous African Figures- Africa has produced many notable figures who have made significant contributions in various fields, such as Nelson Mandela, Chinua Achebe, and Wangari Maathai.- These individuals have influenced not only Africa but also the world through their leadership, literature, and environmental activism.7. Conclusion- Africa is a diverse and vibrant continent with a rich history, unique wildlife, and vibrant cultures.- Despite its challenges, Africa holds great potential for growth and development.- It is important to appreciate and respect the cultural diversity and natural resources of Africa while working towards its sustainable future.以上是9B Unit1 Africa知识点归纳的简要内容，为了更全面地了解非洲，请进一步研究。
9B Unit1 复习提纲
9B Unit1 复习提纲ⅠWords四会名词helmet robot form pill net guitar sunglasses tent planet transport Journey speed human(humans) scientist settler piece medicine star task tank taste quality energy pack astronaut per cent moon condition(条件) guide rest动词imagine develop float connect breathe describe relax形容词crowded polluted sure fashionable enjoyable frightening hard dried certain Martian public副词hopefully completely speciallyⅡPhrases1. ask you a question2. in the form of pills3. at the moment4. by the year 21005.more and more crowded and polluted6. build a better world7. first of all8. at present9. take a very short time 10. in space shuttles=by space shuttle11.at half the speed of light 12.need sth. to do 13.three-eighth of 14.float away into space15. in many ways 16. do most of our work 17. have more time for our hobbies18. connect to an inter-planet computer network 19.take exams in online schools 20. each student 21. in some ways 22. space travel 23. the journey to 24. keep us from floating 25. the least important 26. provide sth. for sb. 27.produce food and oxygen 28. start with 29. be different from 29. be afraid of seeing aliens 30. do harm to31.worry sb. 32.get ill from living there ▲33.have sb. do sth. 34. want sb. to do sth.35. revolve completely around the sun 36. keep sb. away with 37. go somewhere quietⅢSentences1.How do you like life on Mars?/What do you think of life on Mars?2.I thought you liked Mars.3.We will be cared for by robots.4.It may be difficult to imagine that we will live on the planet Mars.5.Here is what life could be like.6.Our spacecraft are too slow to carry large numbers of people to Mars.7.Scientists should be able to develop plants that can grow on Mars.8.Gravity will be a problem for the early settlers on Mars.9.To prevent this, humans on Mars have to wear special boots to make themselves heavier.10.There will be many different designs for settlers to choose from.11.Living in a dome with 10 bedrooms is highly possible.12.Life on Mars may not be better than life on Earth today.13.Food will not be the same and will not be as tasty as they are today.14.There is much more space.15.Things from Earth are hard to find.。
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9BUnit1重点词组及句型
1.How do you like life on Mars?
= What do you think of/about life on Mars? 你认为火星上的生活怎样？
2.get to my food = reach my food 够得着我的食物
3.be cared for by robots 被机器人照顾
4.in the form of pills 以药片的形式
5.at the moment//at present 目前
6.make people feel ill 使人们感到不舒服
7.more and more polluted and crowded 越来越受污染和拥挤
8.by the year 2100 到2100年
9.build a better world 建设一个更好的世界
10.first of all 首先
rge numbers of people
//a large number of people 很多人（谓语动词用复数）
the number of people 人的数目（谓语动词用单数）
12.at half the speed of light 以一半的光速
13.the early settlers 早期定居者
14.three-eighths 八分之三
15.float away into space 飘走到太空中
16.various designs for settlers to choose from 可供移居者选择的各式各样的设计
pare ---with--- 把---和---比较
compared with …和….比起来
18.in many ways 在很多方面
19.have more space 有更多的空间
20.make space/room for 为….腾出空间（空间不可数）
21.be connected to --- 被连接到---上
22.have a computer connected to an interplanetary network 有一台连接到星际网络的电脑
23.take exams at online schools 在网络学校考试
24.as tasty as--- 和---一样美味
25.the journey to Mars 到火星的旅程
26.stop/prevent sb (from )doing keep sb from doing 阻止某人做某事
27.the population on Earth is still increasing quickly. 现在地球上的人口仍然在急剧增加
a large/small population(不可数) 大量人口很少人口
28.take high-quality images 拍摄高清晰图像
29.can be stored for many months 可以被储存数月
30.on the surface of--- 在---的表面
31.provide energy for spacesuit = provide spacesuit with energy给太空衣服提供能量
32.Which thing do you think is the least/most important? 你认为哪个东西最不重要/最重要？
33.conduct a survey 实施一次调查
34.the percentage of …. 百分比---
35.start with a discussion about a survey conducted in schools
以一场关于在学校实施的调查的讨论而开始36.move away from Earth 从地球上迁移出去
37.do harm to=be harmful to sb/sth 对---有害
do good to =be good for 对….有好处
be good/friendly/nice to sb 对…. 友好
38.take off （飞机）起飞；脱去
39.have robots do all the homework 让机器人做所有作业
40.get ill from living there 因为住在那里而生病
41.move around a star 围绕着恒星转动
42.under the control of --- 在---的控制之下
43.appear blue 呈现蓝色
44.be far away from sp 离某地很远
be +5 miles + away from sp 离某地有5英里远
45.keep these animals away with laser light 用激光赶走这些动物
46.a form of entertainment 一种娱乐的方式
47.the public transport system 公共交通系统
48.run over the text 浏览课文
49.I thought you liked Mars. 我原以为你喜欢火星
50.They make us feel like we are really inside the games! 他们使我们感觉就像真的在游戏里面！
语法概要
一、情态动词can/could/may/might 表示请求
Can 用于朋友，同事，熟人，同学之间非正式场合
Could 比can 更委婉，经常用于向陌生人，长辈，老师，老板等请求,用于正式场合could 提问，can 回答
May 用于正式场合，很有礼貌地请求，不确定对方能否给予肯定答复
Might 用于非常正式场合，但很少使用might 提问，用Yes, you may. No, you may not/can’t.
二、由that /if/whether 引导宾语从句（略）
作文
写一篇关于火星上的生活的文章
1。
简要说明
2。
正文（分各个方面来写，如动物，钱，娱乐形式，商场，交通等）。