人教版八年级英语下册Unit-3知识点.docx

人教版八年级英语下册Unit 3知识点Unit 3 What were you doing when the UFO arrived?重点语法：过去进行时态do/does 的过去进行时态形式：（was/were） doingdo/does 的过去进行时态的被动语态：（was/were） being done过去将来时态的肯定句、否定句和疑问句形式：肯定句例句：I was walking down the street when a UFO landed.否定句例句：I wasnt walking down the street when a UFO landed.一般疑问句例句：Were you walking down the street when a UFO landed?特殊疑问句例句：What were you doing when a UFO landed?动词 when 和 while 的选择：when 后加瞬间动词，while 后加延续性动词。例句：The boy was walking down the street when the UFO landed.=While the boy was walking down the street， the UFO landed.感叹句结构：（1） How + adj. + the + 主语 + 谓语动词=（2） What + （a/an） + adj. + n. + 主语 + 谓语动词例句：What a beautiful flower it is!=How beautiful the flower is!What beautiful flowers they are!=How beautiful the flowers are!重点短语：get out 出去；离开take off 起飞run away 逃跑；跑掉come in 进来hear about = hear of 听说take place 发生as as 像一样（eg/ as old as him 像他一样老）anywhere = everywhere = here and there 任何地方think about 考虑think of 认为get up = get out of the bed 起床at the doctors 在诊所every day 每一天everyday adj. 日常的most adj. 大部分the most 最多的in space 在太空中national hero 民族英雄all over the world = in the world 全世界Reading Strategy（阅读方法）The title can be helpful for you to understand a text. （一篇文章的标题可以帮助你理解整篇文章。）Its also a good idea to read the first sentence of each paragraph before you read. （在阅读整篇文章之前，阅读每段的第一句话也是一个很有效的方法。）20 20