山东省新泰市汶城中学高中英语必修二导学案：Unit4WildlifeProtection第4课时.doc

第  PAGE 2 页 共  NUMPAGES 2 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 [来源:学,科,网Z,X,X,K] 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。[来源:Z。xx。k.Com] 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[来源:学科网ZXXK] 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[来源:Z_xx_k.Com] 当堂达标： 1. He was at a_