【倍速课时学练】2015开学备课（外研版）八年级英语下册教学课件：Module 3 Unit 2We have not found life on any other planets yet（共25张PPT）.pptVIP

倍速课时学练 倍速课时学练 倍速课时学练 Module 3 Module 3 Unit 2 We have not found life on any other planets yet. 学习目标 1.熟记重点单词：none, environment, solar, system, group, galaxy, universe, light, impossible, out, communicate 2.掌握重点短语:hundreds of millions of… solar system, in the universe, far enough, in space, go around the sun, be called, have to, communicate with 3.掌握重点句型：(现在完成时) 主语+have/has+动词的过去分词 Do you know the words and expressions in the box? Put them in order: small — large. galaxy planet solar system star universe planet— star —solar system — galaxy— universe Match the words with the pictures. A. galaxy B. planet C. solar system D. star E. universe A B C D E B Skimming(略读) to get general idea 1. Anyone out there? 2. Life on Earth 3. The sun and other stars 4. The stars at night Read the passage and choose the best title for it. Scanning（跳读） to get detailed information Check(√) the true sentences. 1. The earth is a star. 2. The sun is a star. 3. There is more than one galaxy in the universe. 4. The light from the stars in other galaxies has travelled for a long time to reach us. 5. Scientists have received many messages from space. 6. Spaceships have visited most of the universe. √ √ × √ × × Careful reading （精读）to solve difficult points go around the sun 绕太阳转 be called 被叫作… solar system 太阳系 have to 不得不 communicate with … 与…交流,与…联系 far enough 足够远 in the universe 在宇宙中 in space 在太空中 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的生命已经有上亿年的历史。 there be 的现在完成时“there have/has been+名词” There has been a picture on the wall for a long time. There have been some old trees in our school. eg:很长时间以来在墙壁上已经有这幅画了 在我们学校已经有一些古树了。 hundred前加基数词，表示“一百、二百、三百……”，hundred要用单数形式；hundred与of连用表示“数百”时，hundred要用复数形式，即hundreds of。 例如： thousand, million, billion和hundred的用法相同。 There are eight hundred students in our school. There are hundreds of people in the park. We planted _____ trees la