山东省新泰市汶城中学：Unit4WildlifeProtection第4课时Usinglanguage学案（人教版必修二）.doc

第  PAGE 3 页 共  NUMPAGES 3 页 教师寄语: A good book is the best of friends, the same today and forever. （ 一本好书，相伴一生。） 学习内容：Using language 学习目标:语篇理解和听说读写的综合运用能力提高。 预习课文，填写短语： 在地球漫长的历史中 形成，产生 数百万年前 惊讶地发现 不仅……而且 灭绝 一次意外事件 确切地知道 在如此短的时间里 在过去500的时间里 Language points in the passage： 1.They lived on the earth tens of millions of years ago，long before humans came into being.千百万年前恐龙就在地球上生活，比人类的出现要早得多。 (1) long before相当于long long ago，意为“很久以前”，常用于过去时或过去完成时的句子中作时间状语；before作介词后边可以跟时间点; before作连词连接时间状语从句。 (2) before long相当于soon或a little later，意为“不久；不久以后”，常与将来时、过去时态连用，在句中作状语，不可以直接加从句。 (3) It is/ was not long before＋从句　不久就…… (4) It will be long before＋从句　要过很久才…… It will not be long before＋从句　过不了多久就…… (主句用一般将来时，从句用一般现在时) ① It won’t be long before he goes abroad. 不久之后他就要出国。 ② I had heard of him long before I came here. 早在我来这儿很久以前我就听说过他的情况。 即学即练： 1). —Why didn’t you ask the teacher the question? —She had left the office ________ I had time to do it. A．as B．till C．after D．before 2)．The president made a mistake，but then he corrected the situation ______it got worse. A．until B．while C．before D．because 2．According to the UN report，some 844 animals and plants have disappeared in the past 500 years. 短语归纳：in/ during/ for the past/ last …years ‘‘在过去的……..年里’’ 用于现在完成时。 即学即练： 1). In the past few years there _____ great changes in my hometown. A. have been B. were C. had been D. are 2). Many?high?buildings __________ in?Wuhan?in?the?past?few?years. A. have?been?set?up B. have?built C. had?been?built D. had?been?set?up 当堂达标： 1. He was at a________ what to say to the teacher’s question—obviously he