初二英語：人教版下冊知識要點Unit 3

Unit 3 What were you doing when the UFO arrived?

　　重點語法：過去進行時態(tài)

　　do/does 的過去進行時態(tài)形式：（was/were） doing

　　do/does 的過去進行時態(tài)的被動語態(tài)：（was/were） being done

　　過去將來時態(tài)的肯定句、否定句和疑問句形式：

　　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.

　　一般疑問句例句：Were you walking down the street when a UFO landed?

　　特殊疑問句例句：What were you doing when a UFO landed?

　　動詞 when 和 while 的選擇：when 后加瞬間動詞，while 后加延續(xù)性動詞。

　　例句：The boy was walking down the street when the UFO landed.

　　=While the boy was walking down the street， the UFO landed.

　　感嘆句

　　結(jié)構(gòu)：（1） How + adj. + the + 主語 + 謂語動詞

　　=（2） What + （a/an） + [adj.] + n. + 主語 + 謂語動詞

　　例句：What a beautiful flower [it is]!

　　=How beautiful the flower is!

　　What beautiful flowers [they are]!

　　=How beautiful the flowers are!