重点单词
1. earth 地球,名词。用的时候前面要加the。
2. moon 月亮；月球，名词。用的时候前面要加the。
3. news 新闻；消息，名词（不可数）。
4. reach 到达；抵达，动词。后面直接加地点，reach there/ here/home/Beijing；get to到达，后面加地点名词，如果地点是副词，to省略，get to Dalian/get home/here/there；arrive后面接大地点用in，小地点用at，如果地点是副词，in/at均省略，arrive in Beijing/arrive at my school/arrive there/here/home
5. yet 在还，尚(用于表示某事在某一时间尚未发生，但未来也许会发生),副词。常用于现在完成时态的否定句、疑问句末尾。They haven’t finished their homework yet.
6. just 刚才；刚刚，副词。常用于现在完成时态have/has和动词过去分词之间。She has just made some dumplings.
7. latest 最近的；最新的，形容词。the latest news 最新消息
8. discover发现；找到，动词。指发现原本存在的东西。Columbus discovered the American continent in 1492.
9. none 没有一人；没有一个；一点儿也没有，（名词性）代词。表示对三者及以上的否定。反义词all。常与of 连用，none of your business 不关你的事；和你无关。如果none of 后面加可数名词复数形式作主语时，谓语动词可以单数可以复数。None of the students in my class wants /want to have a picnic tomorrow.如果none of 后面加不可数名词作主语时，谓语动词单数。None of milk is for me.
10. group 群；组，名词。in groups 以组为单位；in groups of four 四人一组。
11. light 光；光线；光亮；电灯，名词。轻的；轻松的；少量的；浅色的；明亮的，形容词。3
12. impossible(事情)办不到的，不可能的，形容词。possible 可能的。
13. communicate 联系；交流，动词。communicate with...和......交流，和......沟通。communication 交流；沟通，名词。
短语归纳
1. no problem 没问题(用于表示乐于做某人要求做的事)
2. far away 遥远的
3. in order to 为了；以便；目的在于，后加动词原形
4. get information 得到信息；获取信息
5. go online 上网
6. search for information 搜寻信息；查找资料
7. hundreds of millions of 亿万
8. go around 绕着/围着......转
9. solar system 星系；(尤指)太阳系
10. billions of 数以亿计的
11. communicate with...和......交流，和......沟通
12. be named after...以......命名
M3U1重点句子
1.What are you up to? 你在干什么呢？be up to 正在做某事，忙于某事；从事于......（1）be up to (doing) sth.能胜任......I'm up to going to work today.我今天能上班。/He is up to this job.他能胜任这份工作。（2）be up to sb.是......的职责；由......决定This job is up to you. 这个工作是你的职责。
2.I haven't started yet because I'm not sure how to make it. 我还没开始呢，因为我不确定怎么做它。（1）I'm sure+句子,我相信/确定......（2）how to make it 怎么样做它，how是特殊疑问词，后面可以接动词不定式形式。
3.Sure, no problem. Have you heard the latest news?当然，没问题。你曾听说这个最新消息了吗？（1）no problem 没问题（2）the latest news 最新消息
4.Scientists have sent a spaceship to Mars.科学家已经发送一个宇宙飞船到火星。send sb./sth.to地点/do sth.......派/发送某物/某人去....../做某事 His father sent him to study in Beijing./The company sent him to Shanghai last week.
5.The journey has taken several months.这次旅行已花费好几个月时间。（1）take 花费It takes/took/has taken+某人+时间+to do sth.花费某人多长时间去做某事 It took her three days to finish this work.（2）spend 花费，人 spend 钱/时间on sth./doing sth.人花费时间/钱做某事 She spent 50 yuan on/buying a book./He spent ten days reading a book.（3）pay 付款；付费，人pay for sth./人pay money for sth.人花钱买某物 The boy paid 20 yuan for a pen.
6.Has it arrived yet?Yes, it has arrived already.它已经到达了吗？是，它已经到了。
（1）arrive 到达，接大地点用介词in,接小地点用介词at，如果后面没有具体地点，到达只能选用arrive，不能用get/reach.We arrived the day before yesterday.（2）yet 还；尚,用于现在完成时态否定句或疑问句末尾。（3）already 已经,用于现在完成时态肯定句，常放在has/have与过去分词之间或句尾，偶尔用于疑问句句尾表示惊讶语气。Have they finished the work already?
7.That's why it's on the news.那就是它上新闻的原因。（1）That's why...那就是为什么/那就是......的原因（2）be on the news 在新闻上，news不可数名词
8.So have they discovered life on Mars? 那么他们在火星上发现/找到生命了吗？discover 发现/找到原本存在的东西。Columbus discovered America in 1492.
9.Astronauts have already been to the moon.宇航员已经到过月球。（1）have/has been to 曾经去过......（表示已经返回）（2）have/has been in 待在......She has been in Dalian for five years.（3）have/has gone to 去......（表示还没返回）Where is Lucy？She has gone to the library to borrow books.
10....but no one has been to Mars yet, because Mars is very far away, much farther than the moon.但是还没有人去过火星，因为火星很远，比月球远多了。（1）far away 很远，遥远（2）much可以修饰比较级，类似用法的词还有a lot,a little,a bit, far, even,any...
11.Lots of scientists are working hard in order to send astronauts to Mars one day.许多科学家正在努力工作为了某一天派宇航员去火星。（1）lots of=a lot of=plenty of+名词（可数或不可数）许多......（2）work hard 努力工作（3）in order to+动词原形，为了......（4）send sb.to sp.派某人去......
12.How can I get information on space travel?我怎样能得到关于太空旅行的信息呢？（1）get information 得到信息（2）on=about 关于（3）space travel 太空旅行
13.You can go online to search for information.I will.你可以上网搜寻信息。我会的。（1）go online 上网（2）search for information（3）will/won't 表示下决心。Don't smoke again，Tom. Sorry, I won't.
M3U2重点句子
1.Scientists think that there has been life on the earth for hundreds of millions of years.科学家们认为地球上有生命存在已经亿万年了。（1）There be 句型现在完成时态结构是There has/have been +名词+介词短语。（2）on the earth 在地球上（3）hundreds of millions of 亿万
2.However, we have not found life on any other planets yet.然而，我们却没有在其他任何星球上发现生命。（1）however 然而，后面常有逗号；（2）any other+名词单数（表示同一范围比较）He is taller than any other boy.(3)any other+名词复数（表示不同范围比较）She is better than any other boys.
3.The earth is a planet and it goes around the sun.地球是 一个行星，它绕着太阳转。（1）go around 绕着（2）earth，sun都是世界上独一无二的事物，前面要加the。
4.None of them has an environment like that of the earth, so scientists do not think they will find life on them.它们中没有一颗行星有与地球一样的环境，所以科学家们认为其他行星上都不会找到生命。（1）none没有一人；没有一个；一点儿也没有，（名词性）代词。表示对三者及以上的否定。反义词all。常与of 连用，none of your business 不关你的事；和你无关。如果none of 后面加可数名词复数形式作主语时，谓语动词可以单数可以复数。None of the students in my class wants /want to have a picnic tomorrow.如果none of 后面加不可数名词作主语时，谓语动词单数。None of milk is for me.(2)think 认为，常接宾语从句。We don’t think they will come to Dalian tomorrow.如果主句主语是I/we,并且主句是一般现在时态，从句的否定一般要转移到主句上。believe,imagine也有类似用法。
5.There are billions of stars in the Galaxy...在星系中有数十亿恒星。billions of 数十亿
6.They are very far away and their light has to travel for many years to reach us.它们很遥远，它们的光不得不经过很多年才到达我们（地球）。（1）far away 遥远（2）reach 到达，直接接地点。They reached Shanghai two days ago.
7.Scientists have sent spaceships to the planet of Mars to take photos.科学家们已经发射宇宙飞船到火星上拍照片。（1）send sb./sth. to sp.发送某人/某物去......（2）to take photos拍照片，动词不定式表示目的。
8.With so many stars in the universe, are we alone, or is there life out there in space? 宇宙中有这么多恒星，我们是孤独的还是在太空中地球之外有生命存在呢？（1）so many+可数名词复数，那么多/如此多......（2）in the universe 在宇宙中（3）in space 在太空中
9.Why has no one communicated with us? 为什么还没有人和我们联系呢？communicate with...和......沟通/交流
M3U3重点句子
1.Saturday is named after the planet Saturn.周六是以土星来命名的。be named after...以......命名
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