Unit 2 We haven’t found life on other planets yet.

(课件网) 外研小学起点 初二(上) Module 3 Unit 2 We haven’t found life on other planets yet. galaxy planet solar system universe star I can see… planet small star universe galaxy solar system large 1. Read the passage and choose the best title. a. Anyone out there b. Life on earth c. Our solar system d. The stars at night Have we found life on other planet yet 1. The Earth is a star. 2. The Sun is a star. 3. There is more than one galaxy. 4. Our galaxy is part of the Milky Way. Check ( ) the true sentences 5. The light from stars has taken a long way to reach us. 6. Scientists have found life on other planets. 7. They’ve received many messages from space. 8. They’ve visited most of the universe. e.g. The old man was alone in the house, and he felt very lonely. 这位老人一个人在屋里, 他感到非常孤独。 Language points 1. alone adj. & adv. without any other people 独自(的); 单独(的) lonely adj. 寂寞;孤独 She lives alone, but she doesn’t feel lonely. 她独自住着, 但并不感到孤独 。 2. beyond prep. more than sth. 超出; 除……之外 We have learned beyond 3,000 words.我们已经学了3000多个单词。 e.g. It’s said that more than one planet go around the sun in the solar system. 据说在太阳系里不止有一颗行星绕太阳转。 3. more than 意思是 “多于”, 同义词为over, 反义词组less than 4. no one 意思是 “没人”, 是两个单词。 no one=nobody, 指人; 做主语时, 谓语动词只能用单数, 不能用复数。 no one 后面不能接of。 e.g. No one told us about that 关于那件事没人告诉过我们。 none 也有 “没人” 之意, 而且还有 “ 没有物” 之意, 不过是指三人或三人以上的人或物。 做主语时, 其谓遇动词用单复数都可以。 none一般可与 of 连用。 e.g. None of you haven’t finished the work. 你们都没有完成这项工作。 5. so many 意思是“那么多的…”修饰可数名词复数, 经常与that 从句搭配, 构成“ so many +可数名词复数＋that…”句型。 e.g. There are so many stars in the sky that none can count out.　 天空中这么多的星星, 没有人数得清。 e.g. He ate so much food that he couldn’t stand up. 他吃了那么多食物以至于站不起来了. so much “那么多的……”修饰不可数名词 6. Scientists think that there has been life on earth for millions of years. 科学家认为地球上存在生命已经数万年了。 精讲:这是一个含有that 引导的宾语从句的复合句, 从句中there has been 是there be 结构的现在完成时态。 millions of 是一个常用短语, 表示 “数百万计的……”, 指不确切数字, 而确切数字是:one, two, three等基数词+ hundred, thousand, million 或billion +可数名词复数。 e.g. There are four hundred students in our school. 7. The sun and its planets are called the solar system. 太阳和所有围绕它旋转的行星被叫作太阳系。 精讲:本句中的are called是被动语态。 被动语态的构成:be +过去分词。 e.g. The picture is drawn by him. The letter is written by her. 8. The stars we see at night are the suns in other solar systems. 句中的star, 指的是能发光的恒星, 每个恒星包括它的卫星(行星)以及行星的卫星(如地球的卫星月球)统称一个太阳系。月亮之所以发光是因为它能反射太阳光。 9. Scientists have sent lots of spacecraft to look at oth ... ...