Unit 1 Life on Mars-（精选3篇）
Unit 1 Life on Mars- 篇1
unit 1 life on mars
一. 教学内容：
unit 1 life on mars
main task:
write your own guide to living on mars.
tasks:
1. use ‘can, could, may, might’ to talk about permission.
2. express personal feelings concerning a future situation.
二、重点、难点：
comic strips
1、how do you like life on mars？ i hate it. 你觉得火星上的生活怎么样？我讨厌它。
①how do you like? 你觉得……怎么样？ 主要用来询问对方对某事的印象，也可以改为“what do you think of …”这一句型。
eg. how do you like this book? i think it’s a good book.
how do you like china? i like it very much.
what do you think of china?
②hate 讨厌，不喜欢，后可跟名词、代词、动名词或动词不定式。
eg. i hate monday morning.
he hates her because she always plays tricks on him.
i hate watching tv, i prefer to read.
she hates to drive at night.
hate 的同义词是dislike, 反义词是like/enjoy。
2、i thought you liked mars. 我原以为你喜欢火星。
i thought …“我原以为…”，是指过去曾有这样想法，但事实却不是这样。
i think …是指现在这样认为，往往与事实是相符的。
eg. i think he is a thief.
i thought he was a thief.
welcome to the unit
1、help daniel compare living on mars to living to earth at present. 帮助daniel把住在火星上与现在住在地球上作个比较。
compare “比为”、“比作”，常与to连用，意为“比喻”、“把……比作”，有时也表示“将……同……作比较”。
eg. we may compare the world to a stage.
life is often compared to voyage.
2、we will be cared for by robots. 我们将由机器人来照顾。
care for 照顾、照料，相当于look after / take care of
eg. the sick must be cared for.
we care for one another here.
care for 还可表示“喜欢”、“愿意”。
eg. she doesn’t care for skating.
3、food will be in the form of pills. 食物将是药丸的形状。
in the form of … 呈现…形状，处于某种形式，form形状，形态。
eg. the cakes are all in the form of stars.
he saw a strange form in the fog.
4、make people feel very ill. 使人们感到很不舒服。
reading
1、moving to mars 移居、适居到月球上。
move v. ① 适居、搬迁,常跟to 连用
eg. they’re going to move.
are you going to move to beijing next month? 你们下个月将迁到北京去吗？
② 搬动、移动
eg. we’d better move the desk into the next room.
please move your car. it’s in my way. 请把你的车动一下，它挡路了。
③ vt. 打动、使感动
eg. what he said moved everyone.
the story moved us deeply.
move有二个形容词形式，即moving和 moved
moving“令人感动的”，通常指一件事或一种情况。
moved “感动的”，其主语往往是人。
eg. the play is very moving.
we were greatly moved by what he said.
2、at the moment, it may be difficult to imagine, but …. 现在，很难想象，但是…。
at the moment “现在、目前”
eg. we have no cars at the moment. 我们现在还没有汽车。
my mother is cooking the meal at the moment. 我妈妈现在正在做饭。
imagine v. 想象、设想，后跟名词、动名词或从语作宾语，也可跟复合宾语。
eg. little tom likes to imagine himself an air pilot. 小汤姆喜欢想象自己是个飞行员。
can you imagine her becoming a pilot?
you can’t imagine how i missed you. 你们不能想象我多想念你们。
imagine v.→imagination n.→imaginative adj.
3、by the tear 2100, we will live on the planet mars. 到21XX年，我们将生活在火星上。
by 介词，“到……为止”，后跟将来时的时间，用一般将来时；后跟过去时的时间，用过去完成时。
eg. by next month, we’ll finish learning book three.
by last year, they had worked there for 20 years.
4、first of all, transport should be much better.
first of all = first 首先，第一；指在所有的事中，首先要做的事
eg. first of all，let me say something about our plan.
at first 最先，当初；指事物最先的情况，而后来往往有变化。
eg. at first i didn’t like him, but now i do.
5、at present, our spacecraft are too slow to carry large numbers of people to mars. 眼下，我们的太空飞船太慢了，不能把大批人送到火星上。
large numbers of = a number of … “许多、大量”，修饰可数名词的复数
eg. chinese is spoken by the largest numbers of people. 讲汉语的人最多。
large numbers of my friends / a number of my friends came to the party.
6、to prevent this, humans on mars have to wear special boots to make themselves heavier. 为了预防(防止)这一切，在火星上的人必须穿上特制的鞋子来给自己加重。
prevent ① vt. 防止、避免
eg. prevent accidents
② vt. 阻挡、制止
prevent sb. (from) doing sth.
eg. the rain prevented us from coming in time. 下雨使我们没有及时到来。
nobody can prevent us from getting married. 什么也不能阻止我们结婚
类似的短语有： stop sb. (from) doing sth
keep sb. from doing sth
eg. he stopped the child from playing near the river.
the rain kept us from going out.
7、every student will have a computer at home connecting to an inter-planet computer network. 每个学生家里将有一台电脑和行星之间的电脑网络相连接。
connect to 把……和……相连接
eg. the keyboard has been connected to the computer.
在上句中，connecting to… 是现在分词短语作定语，修饰 a computer
8、however, in some ways, life on mars may not be better than life on earth today. 然后，从某些方面说，火星上的生活可能没有今天地球上的生活好。
in some ways = in a way = in one way
9、a power that keeps us from floating in the air. (p.6) 一种阻止我们在空气中漂的能力。
keep sb. from doing sth. 预防/防止某人做某事，相当于prevent sb from doing sth.
eg. the rain kept us from going out.
vocabulary
1、takes high-quality images 拍高画质的图像
take 在这里的意思是拍摄
eg. take photos
2、fixed to the walls to prevent floating 被固定在舱壁上以防止漂浮。
fix 用作动词，表示“将……固定在另一个物体上”，“安装”，“使……固定”，常与to连用
eg. please fix the shelf to the wall.
the table was fixed to the floor.
3、which do you think is the least important?
the least important 最不重要的， the most important
less important 不太重要的， more important
do you think 是个插入语，不作成份
此时若疑问词作主语，语序不变；若疑问词作其它成份，后面的句子需要用陈述句语序。
eg. who (do you think) is over there? (你认为)谁在那里？
what (do you think) has happened? (你认为)发生了什么事？
what do you think i should do? 你认为我该做什么？
where do you think you most like to go? 你认为你最喜欢去哪里？
grammar a
a using ‘can’，‘could’，‘may’and‘might’to talk about permission. 用can，could，may，might表示请求或给予许可。
1、can 常用于口语中，表示非正式的请求，请求对象一般是朋友或家人。
eg. can i use your computer?
can i watch tv, mum?
2、could 是can的过去式，但在口语中，could常代替can来向对方委婉地提出请求，比can正式，请求的对象一般是老师或成年人，这时could不表示过去时态，回答时一般用can或can’t。
eg. could i ask a question, mr. li?
yes, you can. / no, you can’t.
3、may 也可用来征求对方的意见，表示“可以”，相当于can，但比can更正式和礼貌，请求的对象一般是陌生人或你所尊敬的人。
eg. may i borrow this helmet?
yes, you may. / no, you may not.
4、might 是may 的过去式，但它也可以用来征求对方的意见，比may、could更礼貌，但很少用。这时might不表示过去时态，回答用may。
eg. might i speak to him now?
yes, you may. / no, you may not. / i’m afraid not.
Unit 1 Life on Mars- 篇2
unit 1 life on mars
第一部分 简要提示
一、年级：九年级
二、教学内容： unit 1 life on mars
三、课型： reading
四、教学目标
1. 知识目标
掌握本课时的四会单词、主要词组和句型。
2. 能力目标
1) 学会运用本课所学的主要词汇和句型来简单描述未来生活。
2) 学会略读和寻读等阅读技巧。
3. 情感目标
引导学生思考在另一个星球上生活的前景和可能性，比较不同环境的优点和缺点，激发学生探索未知世界的热情。
五、教学重难点
1. 重点
1) 学习和运用四会单词、词组。
2) 掌握略读和寻读等阅读技巧。
2. 难点
1) every student will have a computer at home connected to an interplanetary network.
2) compared with life on earth, life on mars will be better than life on earth in many ways.
3) there will be various designs for settlers to choose from.
3. 思考在另一个星球上
第二部分 教学流程
用时：25分钟
step 1 pre-reading 用时： 分钟
(出境)
t: hi, everyone! glad to meet you .welcome to unit 1 reading.( 同学们,你们好.今天我们来学习unit 1 阅读 )
t: everyone knows that chang’e has been launched into space lately.人人知道最近嫦娥一号被发射到太空. that’s really exciting . it can help us to know more about moon. do you want to live on moon or some other planets ? we are used to living on earth, but some people are thinking about moving to other planets. why ?let’s look at some pictures first. (ppt)
part one lead-in
t: what can you find from the pictures?
----what problems does earth have ?
t: the pictures show that earth has two problems :one is the large population ( it’s crowded ), the other is the serious pollution ( it’s polluted).
t: now earth is crowed and polluted. what shall we do ? some scientists say there is a better world―mars. do you know the planet mars? and before we start to read the article mars. let’s have a look at these new words first.
part two pre-reading
t: please fill in the blanks with the correct words according to the whole sentence and the english explanation in the brackets. (请根据句子含义及括号内的英语解释填入所缺单词) (ppt)
t: ok. let’s check the answers together.
1. a large body in space that moves around the star, e. g., the sun means planet.
2.a power that keeps us from floating in the air means gravity.
3.a vehicle designed for travel in space means spacecraft.
4.people who go to live in a new place mean settlers.
grow and improve means develop.
5.machines that can do tasks under the control of computer mean robots.
small round pieces of medicine mean pills.
t: now read the new words after me.(2遍)
new words: planet gravity spacecraft
settlers develop robots pills
t: boys and girls, how much do you know about mars? do you its color , its size and some other information? now let me show you my research on mars. (ppt)
1. the color of mars: red ;
2. the size: about one-half the diameter of earth;
3. location:bit’s between earth and jupiter in our solar system.
4. its moons: phobos and deimos
5. surface: the surface of mars is a little like the surface of earth.
6. temperature: the lowest temperature will be -133℃(degrees centigrade) and the highest will be 27 ℃
(整屏显示6点知识) （ppt）
t: now you have learned something about mars from my research. but is there anything else you want to know about mars? what is the fastest way to learn more about mars?
t: that’s searching the internet. now look at the keywords. guess their meanings first and then use the search engines to help you. try to find the information about them on the internet. (下面我们来看这些关键词,先猜测它们的含义,然后用搜索引擎来验证你的猜测是否正确.,再在网上找到有关他们的信息.)
超链接） (ppt)
1. crowded planet : the population on earth is about 6.4 billion in . it’s still increasing quickly…population here means the number of people. (ppt) (XX年地球人口为64亿，现在这个数字还在快速增长。)
2. space shuttles : they are new kinds of spacecraft which can travel faster in space. (ppt) （他们是新型的可以在太空里飞行更快的航天飞机。）
3. speed boots : they are special shoes that can make you walk faster in space.（他们是可以使你在太空行走更快的特殊鞋子。）
4. space home : it’s a special round house in space.(这是在太空里的特殊的圆形房子。) (ppt)
5. robot settlers: settlers are the persons who move to a new place .（拓荒者是第一批搬到一个新地方的人。）/ maybe robots will move to mars and live on it first. (ppt)
6. online teacher：the teacher who can help you at any time and any place in an on-line schools is called ‘e-teacher’. （在线老师可以在任何时候、任何地方帮助你。）(ppt)
step two while-reading 用时： 分钟
task one skimming
t: now would you please open your books at page 8 ? read the article quickly and find out the keyword of each paragraph. it can be a word or some words. you don’t have to read it word by word. just skim it. this kind of reading skill is called skimming. (同学们，请快速地阅读文章的第一段，帮我找到其中的关键词。它可能是一个单词或几个单词，阅读时你没有必要逐字逐句地读，要跳读,这种阅读技能叫做略读)。
t: ok, boys and girls. let’s check the answers now : (ppt)
para 1 crowded, polluted (population , pollution)
para 2 transport
para 3 food, water and air
para 4 gravity
para 5 home
para 6 school
para 7 food
task two scanning
t: that’s very easy for you, right. read each paragraph again , this time you should be more careful and pay more attention to the details . while reading the article , please find out the answers to the questions .it’s another kind of reading skill called scanning (请同学们再仔细阅读文章每一段内容，这次希望同学们读得更加仔细。在阅读的的同时，请大家思考这些问题的答案。在阅读的同时找出文章中细节性的内容, 这种阅读技能叫做寻读。 (2-
t: now ,boys and girls , please look at the screen here, let’s check the answers.（ppt）
※transport （ppt）
1 what vehicle do people use to mars at present? and how long does it take? ( spacecraft . months.)
2 what vehicle may people use to go to mars in the future?
and how long will it take?
(space shuttles. only a very short time.)
※ air ,water ,food （ppt）
3 what will scientists do to solve the problems of food , water and air?
( scientists will develop plants that can grow on mars and produce the food, water and oxygen .)
4 what will food on mars be like?
( maybe the food will be in the form of pills and will not be as tasty as they are today.)
※ gravity （ppt）
5 is gravity on mars a big problem? why?
( yes, it is. because the gravity on mars is three-eighths of the gravity on earth. )
6 what may happen then?
( people may jump high easily and float away into space.)
7 what kind of shoes should people wear?
(people should wear special boots to make themselves heavier.)
※ home （ppt）
8 what kind of house may people live in ?
( a special dome with 10 bedrooms is highly possible .)
9 who will do most of our work?
(robots will do most of our work.)
※ school （ppt）
10 what kind of school will students study in? and what do they call their teacher?
( students can study in online schools and they call their teacher ‘e-teacher’.) (连接星际电脑网络)
t: well, you really did a good job today. . from the reading we know that life on mars is very different from that on earth. please compare theses differences and fill in the form below (ppt)
.t: have you finished now? let’s check the answers together.
step 3 post-reading 用时: 分钟
task one fill in the blanks (ppt)
earth today mars in 2100
polluted and crowded 1
spacecraft are slow. 2
gravity is not a problem for us. 3
people can wear many types of shoes. 4
people do not have much space. 5
we take exams at school. 6
we have many kinds of food with different tastes . 7
keys:
1 clean and has lots of space
2 space shuttles travel at half the speed of light.
3 only about three-eighths of the gravity that we have on earth
4 people wear special boots.
5 people live in a dome with 10 bedrooms.
6 we take exams in online schools.
7 meals are just pills.
t: congratulations ! you’ve got all the right answers . you know every ‘coin has two sides’. here are some good points and bad points of living on mars. we call the ‘good points’ “advantages” and ‘bad points’ “disadvantages”.(我们知道：事物都有正反两方面，下面我们来看一下在火星上生活的利弊。我们把好的方面叫做“advantages”，把不好的方面叫做“disadvantages”。) please look at the screen and fill in the right words. ( ppt )
t: ok? let’s check the answers now.
advantages
※ it’s not _______or________.
※ the ________ is more convenient .
※ people will wear special _____
※ people will have ______space .
※ ______ will do most of our work.
※ we’ll have more time for_______.
※ students will study in ______ schools.
keys:
1 crowded polluted 2 transport 3 boots 4 more
5 robots 6 hobbies 7 online
disadvantages
※ low _______ will be dangerous.
※ food does not taste _____.
※ space travel make people feel ________.
※ it’s too ___to stay outside.
※ it’s too ____ away from friends on earth.
keys:
1 gravity 2 good 3 ill / sick 4 cold 5 far
t: now would you please open your books at page 11 of the students’ book. please complete exercise c1 on page 11
t: .have you finished them? let’s check the answers . ( ppt )
keys:
1 a 2 b 3 c 4 c
5 b 6 b 7 a 8 b
t: well done , you’ve remembered so much about mars. do you have any difficulties while reading? let’s look at some sentences together.
t: important sentences ( ppt )
1 there will be various designs for settlers to choose from. 将有许多种设计可供移居者选择。
to choose from…意思是“从……中挑选”。
eg 我有很多双鞋子可以选择，但我决定不了选哪双。
i have many pairs of shoes _____________(to choose from),
but i don’t know which pair __________. (to choose)
2 the journey might take only a very short time in space shuttles that travel at half the speed of light.用以光速一半速度飞行的太空穿梭机进行的旅程可能只要花很短的时间。
分析：此句是that连接的定语从句。that引导的定语从句修饰先行词space shuttles, 从句中的动词的人称和数由先行词space shuttles决定。
3 compared with life on earth, life on mars will be better in many ways .
与在地球上的生活相比,火星上的生活在很多方面将会更好.
compare with…意思是“ 与……做比较”。在句中是过去分词短语作状语,此时with和to可通用。
eg 与我们的那条路相比,这条路繁忙得多 。
this road is quite busy______ ____ ours. (compared … with / to )
4 every student will have a computer at home connected to inter-planetary network. 每个学生在家里有一台连接星际网络的电脑。
connect to 意思是“与……连接”。这里的connected to 是过去分词后置作定语,修饰computer。当然我们也可以用connect … to…结构表示“把…和…连接起来 ”。
eg 江阴大桥把江阴和靖江连接了起来.
jiangyin bridge _______ jiangyin ___ jingjiang. (connects … to )
t: well, boys and girls ,you really did a good job today.
t：小 结
今天我们学习了一些描述火星生活的词汇、句型，并且讨论了火星上未来生活的优缺点。希望同学课后认真巩固课文内容，用自己的语言来简单描述火星生活。
t: today’s homework: (ppt)
1 read the passage aloud.
2 finish off the additional exercises.
t: that’s the end of my class . good-bye, everyone. see you next time.
additional exercises:
用括号内所给词的适当形式填空:
1 there is less air ________ ( pollute) in town that in the town.
2 look at the newest t-shirt . it’s made of cotton. i think it will become ______ ( fashion ) this summer.
3 it’s ______( high) possible that people can live on mars in the future.
4 grandma is too old _______ ( settle ) on another planet.
5 the helmet is made of metal. it’s too heavy. when
i wear it , i feel _________ ( comfort).
6 my father cooks very well. the food he cooks is as
_______ ( taste ) as that in the restaurant.
7 here are many kinds of moon cakes for you_____( choose ) from.
8 ______ ( compare ) with what he had already, the new stamps were not very interesting.
9 _______( hope ), doctors have found a new way to operate on the patients --- flying hospital.
10 we should keep water from _____( be ) polluted .
keys to additional exercises:
1 pollution 2 fashionable
3 highly 4 to settle
5 uncomfortable 6 tasty
7 to choose 8 compared
9 hopefully 10 being
说 明
本课时是9b unit 1的reading。这一课时展望了将来人们在火星上的生活状况。文章分别就交通 、重力等5个方面讨论了火星上生活的优缺点。在组织教学时，教师要鼓励学生展开想象, 提醒学生在谈论未来生活时很多答案没有对错之分。同时教师还应注意对学生略读和寻读等阅读策略的训练。
Unit 1 Life on Mars- 篇3
unit 1 life on mars
一. 教学内容：
unit 1 life on mars
二. 教学目标：
本单元重点词汇、短语和语言点知识
【具体教学过程】
9b unit 1
一、重点单词
机器人 n. robot
片剂，药片n. pill
网，网络 n. net
吉他 n. guitar
太阳镜 n. sunglasses
帐篷 n. tent
储藏，存储 v. store
表面n. surface
干缩的，干的adj. dried
想象，设想v. imagine
拥挤的adj. crowded
被污染的adj. polluted
可以指望；怀希望地adv. hopefully
宇宙飞船n. spacecraft
航天飞机n. space shuttle
人；人的n. & adj. human
发展v. develop
移居者n. settler
流行的，时髦的adj. fashionable
各种各样的，不同的adj. various
巩固练习：
1. in summer travelers wear their s______________________ because of the bright sunshine.
2. h_____________________, we can build a better world on mars.
3. my friend is musical. he is good at playing the g____________.
4. when you are ill, you should take p___________________ on time.
5. it’s great that r________________ do all the work for us.
6. if you go camping, you should take a t________________ with you.
7. fishing n________________ is useless on the moon.
8. last summer holiday i went to beijing and i took lots of photos with my c______________
9. scientists should d ________ plants that can grow on mars.
10. the boots will probably become f _________ .
二、重点短语
1、与某人相处得好 get on well with sb.
2、认识某人 get to know sb
3、被照顾 be cared for
4、使我不开心 make me unhappy
5、三副太阳镜 three pairs of sunglasses
6、避免漂浮 prevent floating
7、连接到氧气罐 be connected to the air tank
8、在星球的表面 on the surface of the planet
9、到21XX年为止 by the year 2100
10、越来越拥挤和受到污染 more and more crowded and polluted
11、3/8的引力 three-eighths of the gravity
12、运送大量的人 carry large numbers of people
13、飘进太空 float away into space
14、不同的设计供定居者选择 different designs for settlers to choose from
三、课文结构和语言点知识
paragraph 1: why we move to mars?
1. moving to mars （l.1）
move :
① move to 搬家，搬迁
他家去年搬到加拿大去了。
his family _________________ _________ canada last year.
他们正准备搬到北京。
they are__________________ ________beijing.
② move 用作动词，可以表示“移动，前进，走棋”。
don’t move!
该你走棋了。
it’s your turn ________ _____________!
③ move 用作动词还可以表示“使感动；打动”。
我被这部电影深深地打动了。
i ________ deeply ___________ by the film.
2. at the moment it may be difficult to imagine, but many people believe that, by the year 2100, we will live on the planet mars.（l. 2）
① may be 可能是 情态动词may＋动词原形
这可能是一本好书。
this may be a good book.
火星上可能有空气。
there may be air on mars.
maybe 副词＝probably，修饰动词、句子。
maybe this is a good book.
maybe there is air on mars.
② it’s＋adj.＋（for sb.）to do sth.
对我们来说学好英语很有必要。
it’s necessary for us to learn english well.
③ imagine v. （adj.）imaginative （n.）imagination
你能想象没有电脑的生活吗？
can you imagine life without computers?
想象一下生活在月球。
imagine living on the moon.
想象一下火星上的生活可能是什么样。
imagine what life could be like on the mars.
3. our own planet, earth, is becoming more and more crowded and polluted.（l. 3-4）
①more and more 越来越多
越来越多的人/污染
more and more people / more and more pollution
越来越少（不可数）
less and less
越来越少（可数）
fewer and fewer
②比较级＋比较级：“越来越”
越来越容易/越来越强大
easier and easier / stronger and stronger
越来越拥挤/越来越受到污染
more and more crowded / more and more polluted
4. hopefully, we can start again and build a better world.（l. 5）
n./v. hope adj. hopeful adv. hopefully
无论我们身在何地，都不能失去希望。
wherever we are, we should not lose our ______________.
充满希望
be full of hope: be hopeful
他有希望赢得第一名。
he is _______________ to get the first prize.
______________________, he will win the first prize.
5. here is what life might be like.（l. 6）
宾语从句：主前动后是语序。
这部电影展示了老北京的样子。
this film shows what old beijing was like.
你能告诉我他住哪里吗？
can you tell me where he lives?
paragraph 2: transport on mars
1. first of all, the transport should be much better.（l. 7）
① first of all首先（最为重要的是）
首先把所有单词记住。
first of all, remember all the words.
at first 起先，开始。
at first, i find english a bit difficult.
②much better
much＋比较级 表示程度
我的头发比她的长很多。
my hair is much longer than hers.
he is _________ busy ____ help me.
a. so much , that b. much too, to c. too much, to d. so much, to
修饰比较级的副词：
even, far, a lot, a little, a bit
2. our spacecraft are too slow to carry large numbers of people to mars.（l. 7-8）
① spacecraft 复数__________________________
chinese, japanese, spacecraft, fish, sheep, deer（单复数同形）
② too … to 太……以致于不能……
she is too young to look after herself.
“too…to”结构可以转换成 “so …that…”或 “not＋形容词＋enough”句型。
the little boy is too short to reach the apple.
the boy is __________ short ____________ he can’t reach the apple.
the boy isn’t ____________ __________________ _________ reach the apple.
③ large numbers of 许多的，大量的
＝a（large）number of＝a（great）number of
很多树
large numbers of trees
the number of … ……的数量
学生的数量
the number of the students
3. the journey might take only a very short time in space shuttles that travel at half the speed of light.（l. 9-11）
① 比较: 旅行 journey, travel, tour, trip, voyage
② take 在这儿表示 “花时间”.
it takes（took）sb. some time to do sth.
同意短语:
sb. spend time/money（in）doing sth. / on sth.
她每天花半小时练习跳舞。
it ______________ her half an hour _______ ____________________dancing.
she ______________ half an hour _______ ______________________ dancing.
she ______________ half an hour ______ ______________________.
（sth.）cost sb. money 某物花了某人多少钱
③ speed n.
at full/ top speed 以全速
at a high /low speed
at a speed of… 以……的速度
以光速的一半的速度
at half the speed of light
v. speeded （sped）
speed up 加速
paragraph 3: food, water and air
1. humans need food, water and air to survive.（l. 12）
① human a human humans
germans walkmans policeman
②need（行为动词）翻译成“必须”，“需要”
1）need sth. to do sth. 需要某物去做某事
我们需要一些水喝。
we need some water to drink.
他们需要一些人去帮他们。
they need some people to help them.
2）（不）需要做某事
（don’t）need to do sth.
我不需要思考这个问题。
i don’t need to think about this question.
③ need（情态动词）翻译成“必须”，“必要”
（不）必要做某事
need（not）do sth.
你不必担心。
you needn’t worry.
④ need（名词）需要
the need for money
the need to improve my english
people in need
2. scientists will develop plants that can grow on mars.（l. 12）
develop vi./ vt.
工业在迅速发展。
industry is developing rapidly.
这个镇是由一个渔村发展起来的。
the town developed from/ out of a fishing village.
the fishing village developed into a town.
he has developed the habit of getting up early.
the pioneers are developing the waste land.
develop natural resources/ solar energy
the photo will look nice when they are developed.
培养兴趣
___________________ _____________________
3. however, nobody is not sure if these plants can produce enough water.（l.14-15）
be sure of/ about 确信
are you sure of/ about his coming in time?
be sure to do 一定会，一定要
she is sure to find out the truth tonight.
make sure（of）确保
he arrived at the cinema early to make sure of a seat.
paragraph 4: gravity
1. the gravity on mars is only about three-eighths of the gravity on earth.（l.16）
分数的表达方法： 分子用基数，分母用序数；分子大于一分母加“s”
三分之一
one third one out of three
九分之二
two ninths
百分数
percent/ per cent
我们年级有五分之一的学生来自其他城市。
one fifth of the students in our grade are from other cities.
70%的水来自于海洋。
70 percent of the water is from sea.
2. to prevent this, humans on mars have to wear special boots to make themselves heavier.（l.19-20）
prevent （vt.及物动词）防止，预防
prevent diseases
使……不做某事，阻止……做某事
prevent sb. from doing sth.
姚明的腿受伤了。这使他不能打篮球。
yao ming’s leg is hurt. this prevents him from playing basketball.
paragraph 5: life
compared with life on earth, life on mars will be better in many ways.（l.23）
1. 过去分词作状语。过去分词与主句的主语是动宾关系，即过去分词与主语是被动关系。
（1）the teacher came into classroom into the lab, followed by some students.
句意为：老师进入教室，后面跟了一些学生。
teacher 与followed 形成被动关系
（2）given a chance, i can surprise the world.
巩固练习:
（1）____in the mountains for a week, the two students were finally saved by the local police.
a. having lost b. lost c. being lost d. losing
（2）the flowers his friend gave him will die unless（除非）______ every day.（四川高考）
a. watered b. watering c. water d. to water
2. in many ways 在很多方面
by the way 顺便问一下
make one’s way 排除困难前进
in one’s way 碍事，妨碍
on one’s way 在去……的路上
in this way 用这种方法
the soldiers cut a way through the forest.
开出一条路
this way, please.
man is trying to find ways to stop pollution.
paragraph 6: study
paragraph 7: some disadvantages on mars
