初二英语：人教版下册知识要点Unit 3
发布者：网上发布
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） doing
do/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 wasn‘t 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!