unit3讲解及练习.doc

初三英语unit3讲解及练习1. We have a lot of rules at my house. So do we.考例 Jim works hard on his Chinese, and _. A. so Lucy does B. so is Lucy C. so does Lucy D. so Lucy is答案和解析 C。当后者的情况和前者一样时，常用“so+系动词/助动词/情态动词+主语”结构，意为“也”。2. Parents should not be too strict with teenagers.考例 Timmy really doesnt understand why his parents are so _ (严格的)。strict。strict为形容词，在句中作表语、定语。be strict with / in意为“对严格”。3. He should stop wearing that silly earring.考例 There goes the bell. Its time for class. Lets stop _. A. talk B. to talk C. talkingD. not talk 答案和解析 C。 stop doing sth. 意为 “停止做某事”(不做了)； stop to do sth. 意为“停下来去做某事”（去做另一件事）。Units 1-3 语法要点归纳在Unit 1中出现了很多v-ing形式，你知道它有哪些用法吗？让我们先看下面的例句吧！【例句】1. Reading in the sun is bad for your eyes. 在太阳下看书对眼睛有害。2. When will you finish reading this book? 你什么时候能读完这本书？3. The teacher left without saying anything to us. 老师什么都没说就离开了。4. My hobby is collecting stamps. 我的爱好是集邮。【结论】A. v-ing形式可在句中做主语，后面谓语动词用单数形式（例句1）。B. v-ing形式也可做动词的宾语（例句2），英语中有些动词的后面只能跟v-ing形式做宾语。这样的动词有：consider(考虑)，enjoy, finish, keep, practice, mind, suggest等。C. v-ing形式还可做介词宾语(例句3) 或表语（例句4）。在Unit 3中出现了由so引起的倒装结构，另外还有两种跟so 相关的句式，一起来解读一下吧！【例句】1. Mary likes swimming, and so does Kate. 玛丽喜欢游泳，凯特也喜欢。2. Its very cold in this room. So it is.这个房间非常冷。确实如此。3. He asked me to give him a piece of paper, and I did so.他叫我给他一张纸，我照他的话做了。 【结论】A. “so+系动词be / 助动词/ 情态动词+(另一)主语”是倒装语序，说明前句提到的情况也适用于后者，即“甲如何，乙也一样”。so意为“也”，前后句的主语为不同的人或物。 B. “so+主语 +系动词be / 助动词 / 情态动词”用于重述前面的事实，并表示赞同或强调，有“确实如此”之意。在此结构中，前后句主语相同。C. “主语+实义动词+so”中的so为副词，意为“如此、这样”。但没有I am so, I have so等形式。 allow 【例句】I dont think sixteen-year-olds should be allowed to drive.（P18）【点击】allow 作动词，意为“允许”，常用于allow sb. to do sth.结构，意为“允许某人做某事”。例如： His mother allows him to play soccer after school.should be allowed to do sth. 意为“应该被允许做某事”。例如：You should be allowed to choose your job.shouldnt be allowed to do sth.意为“不应该被允许做某事”。例如：You are so young. You shouldnt be allowed to drive. succeed But they are always talking about what will happen if I dont succeed.【点击】succeed 作动词，意为“成功、达到、完成”，后接in sth. / doing sth.。例如：I hope you will succeed in your studies.The policeman has finally succeeded in solving the problem.【拓展】success 作“成功、成就”讲时，是不可数名词；作“成功的人（或事物）”讲时，是可数名词。例如：He has had great success.His new book was a great success.successful作形容词，意为“成功的”，在句中做定语或表语。例如：He wants to be a successful writer. Im sure you will be successful.含有情态动词的被动语态 温故 在英语中，动词有两种语态，即主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。在八年级同学们已初步学习了被动语态，它的结构为：助动词be +及物动词的过去分词。 知新 本单元我们主要了解含有情态动词的被动语态。它的结构是什么呢？观察下面例句中含情态动词被动语态的各种形式，然后补全结论中所缺的内容。【例句】1. Many trees should be planted in the mountains. 应该在山上种许多树。2. You can take this book home. （改为被动语态）This book can be taken home (by you). 3. This problem cant be worked out very easily. 这道题轻易算不出来。4. Must the work be done at once? 这项工作必须立即完成吗？【结论】A. 含有情态动词的被动语态的结构为：情态动词+_+及物动词的_。B. 含有情态动词的主动语态变为被动语态时，要把主动语态的_变成被动语态的主语。C. 变为否定句时只需要在情态动词后加_。D. 变为一般疑问句时只需把_提到句首。【运用】1. ( )Young trees should _ every year. A. be planted B. plantedC. plant2. We must do the work right now. （改为被动语态）_ _ _ _ _ right now.3. Teenagers should be allowed to go out with their friends on school nights.（否定句）Teenagers _ _ _ to go out with their friends on school nights.4. A book should be read each month. (改为一般疑问句)_ _ _ _ _each month?5. 每天喝牛奶对健康有好处。_ _ every day is good for health.6. 他经常练习打篮球。He often practices _ _. 7. 你会有机会学日语的。You will have the chance of _ _.8. 她的工作是洗衣服。Her job is _ _. ( )9. _ is not easy to learn math. A. ItB. ThisC. That( )10. Its hard _ such a little girl to carry the big bag.A. ofB. forC. to( ) 11. Its very kind _ you to help me. A. for B. of C. with( )11. I played football yesterday, and _（他也踢了）.A. so did heB. so he didC. he did so( ) 12. Basketball is the most popular game in America._（的确如此）. A. So it isB. So is itC. It is so( )13. I told him to come and see me the next day, and _（他这样做了）.A. he did so B. so he didC. so did he ( ) 14. Her mother doesnt allow her _ earrings.A. to wearB. wearing