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1、Unit4 Topic3 Section A课堂作业一、词汇1wonder(形容词)2. excite(形容词)和3 science(名词，科学家)： (形容词)二、精读课文1a，完成下面的分析与练习。1.这周六晚上_ 2.太空生活_ 3.在火星上生活_4. 在太空生活_5.乘飞船旅行_6.在地球_7.将能够_8. 多么有趣！_9. There be句型的一般将来时：_或_课文第一句可改为：10.We will be able to do anything that can be done on earth. 思考：that can be done on earth是_从句，修饰先行词_点拨：
2、can be done - 能够/可以被做(带有情态动词的被动语态) 含有情态动词的被动语态结构为：练习：a.这些树明天必须被栽种。These trees _ _ _ tomorrow.b.李明可能被选为我们班的班长。Li Ming _ _ _ as the _ of our class. c.下课后应该擦黑板。The blackboard _ _ _ after class.be able to 与can的区别：be able to有各种、和的变化，而can只有一般现在时和一般过去时的变化，并且它们不能。三、精读课文2a，完成下面的分析与练习。1我恐怕不信。它是的否定句。类似句子有：我希望如
3、此，我希望不是这样。但注意：我认为是这样，我认为不是这样。2_以便了解人类文化in order to意思是，表示，后接，既可放在又可放在。它的否定形式是：。如果后面接目的状语从句则要用或。练习 .过去为了赚钱他们什么都肯做。They did anything _ _ _ _ _ in the past. .为了通过考试，他每天学习十多个小时。 _ _ _ _ fail the exam, he studied _ _ _ _ _ every day. .为了能赶上早班车今天早上他起床很早。He _ _ early _ _ he _ _ the early bus this morning.为了
4、提高口语他去年去了英国。He went to England last year _ _ _ _her_English.3.But I dont think aliens can be found in space.但是我认为在太空中找不到外星人。当think, believe, suppose, imagine, expect等动词后接的宾语从句含有not等否定词且主语为第一人称时，该否定要前移，即否定主句的谓语动词。如I think的否定形式为，I believe的否定形式为，但当主句的主语是第二三人称时，否定式一般。注意：改写反意疑问句时，当主句的主语为人称时，反意疑问句的主、谓要与保持
5、一致。如I dont think it will rain tomorrow, _? 如果主句的主语是人称时，反意疑问句的主、谓要与一致。He thinks he can make it, _?4.亲眼所见：_5. I wont believe there are aliens until I see them with my own eyes.除非亲眼所见我才相信有外星人存在。not until意思是, 主句用，从句用。主句中的动词通常是，但当主句的动词为wait, watch, think等动词时，不与连用。练习：1.昨天晚上直到完成作业我才睡觉。I _ go to bed _ I _ m
6、y homework last night. 2.明天我会一直等到你回来。I _ _ _ you _ you _ back tomorrow.6. Scientific research should be done carefully. 科学研究应仔细地进行。 _意为“研究，调查”，可做名词，也可做动词。做大量的研究/调查_四、把下列句子改为被动语态1、He can work out the problem easily . The problem _ _ _ _ by him easily. 2、 We must plant more trees to protect the enviro
7、nment . More trees _ _ _ _ protect the environment by us . 3、We should change clothes often to keep healthy . Clothes _ _ _ often to keep healthy . 4、 Scientists may clone humans some day . Humans _ _ _ by scientists some day . 5、 People must not throw rubbish into the river . Rubbish _ _ _ _ the ri
8、ver by people . 五、巩固练习题：( ) 1. More man-made satellites _ into space . A. must sent up B. can sent up C. must be sent up D. may be send up ( ) 2. - _ an elephant show in the zoo this Sunday . Would you like to go with me ? - Id love to . A. There is going to have B. There will beC. There is going to
9、 hold D. There will have ( ) 3. _ the spaceship , people _ fly to the moon. A. No ; couldnt B. Havent ; cant C. Without ; wont able to D. Without ; wont be able to ( ) 4. - How hard those astronauts work !- Yes . _ finish the flight task , they must keep on _every day . A In order to ; exercising B
10、So that ; exercising C In order that ; exercises D Because of ; exercising ( )5. I didnt have a clear understanding of the science book _ I did an experiment for myself . A. since B. until C. unless D. after ( ) 6. I dont think it will rain tomorrow , _ ? A. do I B. dont I C. will it D. wont it ( )
11、7. I _ go to Beijing with my parents in two weeks . A. can B. am able to C. will can D. will be able to ( )8. On Christmas Day , the children wake up early and cant wait _ their presents in the boxes . A. opening B. for opening C. to open D. open六、自我检测：请完成句子，看谁说得准！1. 应该认真地进行科学研究。 Scientific research _ _ _ carefully2.必定会发射更多的人造卫星进入太空。More man-made satellites _ _ _ into space . 3.我认为外星人不会在太空中被发现。I dont think aliens _ _ _ in space 4. 雪必须在两点前清扫掉。 The snow _ _ _ _ before 2:00.5. 那个工作两天做不完。The work _ _ _ in two days 6. 这个表该修了。 The watch _ _ _ .
