外研版英语八（下）Module 3 Journey to space知识点详解Unit 2 We have not found life on any other planets yet.★(A2).【知识点再现】Scientists think that there has been life on the earth for hundreds of millions of years. 科学家认为地球上的生命已经有亿万年了。
【知识点1】【辨析】on the earth与on earth的用法辨析：①on the earth意为“在地球上”。
如：We live on the earth. 我们生活在地球上。
②on earth意为“究竟，到底；世界上；天底下”。
如：What on earth are you crying for? 你究竟哭什么？// Why on earth did you tell a lie? 你究竟为什么撒谎？He runs fastest on earth. 他是世界上跑得最快的人。
// All men on earth are human brothers. 四海之内皆兄弟。
【知识点2】hundreds of millions of =billions of 意为“数十亿；数以十亿计”。
其中hundreds of意为“数百，成百上千”，millions of意为“数百万；成百万上千万”，都表示约数。
如：This palace is hundreds of years old. 这座宫殿有数百年的历史了。
There are millions of people in this city. 这座城市有数百万人口。
【拓展】数量的表达：①表示确数：“基数词+计数单位(hundred, thousand, million, billion)+名词复数”，意为“几百/千/百万/十亿……”。
Module3Journey to space Unit2We have not found life on anyother planets yet.Ⅰ.根据句意及首字母或汉语提示完成句子1.________(没有一个)of the students has been to Australia in our class.2．We shouldn't throw rubbish around.It's our duty to protect the________(环境)because the earth is our only home.3．The sun is at the heart of the solar system and8________(行星)go around the sun.4．We don't know how large the________(宇宙)is.5．Scientists haven't received any m________from Mars.6．Nothing is i________if you try your best.7．Many companies use emails in their offices,so it's easy for people to c________with one another.8．The solar system is a small part of our G________．Ⅱ.用括号中所给单词的适当形式填空1．It is hard________(say)who will win the game.2．So far none of us________(know)the teacher's name.3.I________just________(hear)the news.I'm very happy.4．It's________(possible)for me to be therebefore eight.There are only five minutes left.5．________you________(write)to your uncle yet?—Yes,I have.6．________(billion)of stars are together with the sun in the Galaxy.7．Sometimes,the sky is________(call)“the vault of heaven(苍穹)”in poems.8．My brother has finished________(make)a model space station.Ⅲ.从括号中选出一个合适的词语完成句子1．I went to the concert last night.My five________(other/others)friends went,too.2．There are three books but Li Lei likes________(no one/none)of them.3．The weather in Shenzhen is different from________(that/it)in Heilongjiang.4．It's________(possible/impossible)for the boy to finish the work.He needs help.5．Don't eat________(such/so)many hamburgers a day.They're bad for your health.Ⅳ.根据汉语意思完成句子1．地球是一颗行星，它绕着太阳转。
M3 U2 We have not found life on any other planets yet教学设计1教学目标知识目标:1）.掌握学习与天体名称及八大行星有关单词短语及句子。
Environment, solar, system, group ,galaxy, universe, light, communicate ,system ,possible.Hundreds of millions of; far away; the solar system; in the universe; in space; communicate with.2.）学会用现在完成时来书写两个句子能力目标:1）培养从对天体运行描述中获取有效信息的能力2）能够用清晰的逻辑描述地球与其他天体的联系，读懂相关文章。
情感目标:培养对太空奥妙的兴趣,对科学的热爱。
2.学情分析本课是一堂阅读课。
八年级学生拥有了一定的词汇量,掌握了一些基本的阅读技巧。
本课谈论的宇宙探索Journey to space是一个科普话题。
学生通过阅读获取文本信息的同时,在设计的一些真实的语境中,学习相关的天体名词，能读懂地球与其他行星的关系，激活了学生原有的的语言积累。
3重点难点评论1）、能够从短文中获取有效信息,会用现在完成时描述宇宙探索的有关知识。
(重点)2）、本课的单词及短语以前接触很少，学生阅读科普文章有一定的难度。
(难点)4教学准备评论教学准备:课堂整体运用任务型教学模式以及阅读课“三段式”教学模式。
5教学过程5.1 教学设计5.1.1教学活动活动1【活动】教学设计本课指导学生通过阅读获取信息,培养学生阅读技能。
在教学过程中,采用多媒体手段辅助教学,利用各种图片和习。
