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
M3U2课文
Scientists think that there has been life on earth for hundreds of millions of years. 科学家认为地球上的生命已有亿万年的历史。
However, we have not found life on any other planets yet.
然而，我们却没有在其它任何星球上发现生命。
The earth is a planet and it goes around the sun. 地球是行星，围绕太阳运行。
Seven other planets also go around the sun. 围绕太阳运转的还有其他七颗行星。
None of them has an environment like that of the earth, so
scientists do not think they will find life on them. 没有一颗行星拥有与地球一样的环境，所以科学家认为其他星星上都不可能存在生命。
The sun and its planets are called the solar system, and our solar
system is a small part of a much larger group of stars and planets,
called the Galaxy or the Milky Way.
太阳和围绕它旋转的行星组成太阳系，我们的太阳系是一个更大的星群里的一部分，这个星群叫银河系，或者银河。
There are billions of stars in the Galaxy, and our sun is only one of them.
银河系里有无数颗恒星，我们的太阳只是其中一颗。
Scientists have also discovered many other galaxies in the universe.
科学家已经在宇宙中发现了很多其他星系。
They are very far away and their light has to travel for many years to reach us.
他们离我们很远，他们发出的光要在宇宙中经过很多年才抵达地球。 So how large is the universe? It is impossible to imagine.
那么，宇宙到底有多大？我们无从想像。
Scientists have sent spaceships to the plant of Mars to take photos
科学家发射了航天器到火星上拍摄图片。
They even have sent spaceships to travel outside the solar system.
甚至发射航天器到太阳系以外进行探索。
However, no spaceship has travelled far enough to reach near other stars in our Galaxy. 然而，还没有任何航天器到达银河系里的其他恒星。
Scientists have always asked the question: With so many stars in
the universe, are we alone, or is there life out there in space?
科学家们一直在问这些问题：宇宙中有这么多星球，只有地球上有生命吗？或者，宇宙中还有其他生命存在？
Have there been visitors to the earth from other planets?
是否有来自其他行星的人造访过地球？
Why has no one communicated with us? 为什么没有任何人与我们联络过？
We do not know the answers…yet. 目前我们还无从知晓这些问题的答案。
微写作练习
你的弟弟虽然只有9岁，但他对太空具有浓厚的兴趣。请你根据所学知识，写一篇短文，向他简单介绍一下有关太空的基本知识。要求中心突出，语义连贯，层次清晰，书写规范，60词左右。 范文
In the universe, there is the earth, the sun and many other stars and planets. The earth goes around the sun. The sun and its planets are called the solar system. The solar system is only a very small part of the Galaxy or the Milky Way. It\\\\\\'s impossible to imagine how
large the universe is! You can study more about it when you grow up. 练习
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U2导学案答案 Module3 Journey to space
Unit 2 We have not found any other planets yet. 【参考答案】
1. that, 宾语，现在完成时，就近，there will be，there is/are going to
be, there was/were, there have/has been, 已经有，There have been more than/over 200,000 patients around the world., There will be/There is going to be a football match next week.
2. Who on earth broke the window?, The number of the wild animals on
the earth is going down/decreasing.
3. goes around(客观真理，即使主句是过去时，从句依然用现在时)
4. a group of, work/learn/study in groups, group members, a group of 5. impossible, polite, impolite, patient, impatient, immature, balance,
imbalance, correct, incorrect, expensive, inexpensive, active, inactive, ability, inability
6. 副词/adv.,后面，not adj. / adv. + enough to do sth. 不足够…去
做…，形容词/adj., 前面， old enough to go， early enough to catch，is not easy enough，not tall enough to reach the kite in the tree, clever enough to work out/solve the/this problem, so clever that he can work out/solve the/this problem
7. a smile on her face, with a book in his hand
外研八下英语M3U2微课精讲+知识点总结
