2016届高中英语短语知识点《Unit 4 Astronomy the science of the stars》学案新人教版必修3_高考复习指南

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　　Unit 4 Astronomy: the science of the stars

　　典型句式运用

　　1. be to do sth.

　　1)表按计划或安排，如：The Queen is to visit Japan in a week’s time

　　2) “命运”,将来必然要发生的事, 译作“注定……”。

　　They said goodbye, little knowing they were never to meet again.

　　3) 表示“应该”/ “义务” ，相当于should, must, have to . 如：You are to report to the police.

　　4)用于否定句，表示“禁止”，相当于mustn’t。例如 You are not to smoke in the reading-room

　　5 )表示“想，打算”，相当于intend, want。例如If we are to be there soon, we’ll have to go now.

　　6）表示可能性,相当于can, may如: Such books are to be found in the library.

　　2．the first, the second，the last 等序数词常与不定式连用

　　He is always the first to come and the last to leave.

　　as+形容词原级+名词词组+as分句

　　Jack is as efficient a worker as Bill。Mary is as intelligent a student as Peter.

　　重点单词

　　1. exist vi. 存在；生存existing adj.目前的；现存的exist on= live on靠……为生

　　come into existence开始存在；成立

　　2. escape v. & n.逃跑，逃离

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