人教新目标九年级Unit 13 Grammar Focus讲解及练习（有答案）

1、.Unit 13 Grammar Focus及练习Grammar FocusPay attention to the sentences.1 Were trying to save the earth.2 The river used to be so clean.3 The air is badly polluted.4 No scientific studies have shown that shark fins are good for health.5 We should help save the sharks.1. They are playing basketball. Nan

2、cy is working on a new book about stories in schools. Why are you always coming late for class? 如今进展时: Present Progressive定义：表示说话时瞬间正在进展的动作，也表示目前或现阶段一直进展的动作。构造: be am/is/ are + v.-ing标志词：Look, Listen, now, right nowe.g. Look! The boy is crying.2. used to do与be used to doingused to do sth. 表示过去常常做某事,

3、 而如今往往不做了, 后接动词原形。be used to doing sth. 表示习惯于做某事。e.g. I used to get up at six oclock. Joe is used to drinking a cup of coffee every morning.3. My grandfather built this house in 1930. This house was built by my grandfather in 1930.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。 被动语态：Passive voice定义：表示主语是动作的承受者，即行为

4、动作的对象的一种语态。构造：be + 过去分词e.g. A new school was built last year. Our classroom is cleaned every day.一般如今时的被动语态：am/is/are + V-ed一般过去时的被动语态：was/were+ V-ed一般将来时的被动语态：will/shall+be+ V-ed不可以变成被动语态的情况 1. 某些感官动词加形容词及少数其他的动词与一些副词连用表示被动意义。 smell, taste, prove, sell, etc. 1 The dish tastes delicious. 2 The theor

5、y proved right at last. 3 The book is so interesting that it sells well. 4 The pen writes well. 2. need做实意动词时，need + V- ing 主动形式表示被动意义。 我的车需要修理。 My car needs repairing. = to be repaired. 3. 通常只有及物动词组才有被动 语态，不及物动词没有。战争爆发了。The war broke out.但不能说：The war was broken out.4. Lily, clean your teeth please.

6、Mum, I have already cleaned them.如今完成时表示动作发生在过去，并对如今有影响。如今完成时: Present Perfect定义：表示动作已经完成, 但对如今造成影响; 或者表示从过去某一时间开场一直延续到如今并还可能持续下去的动作。 构造: has/have + 过去分词标志词：already, yet, ever, never, since, fore.g. I havent finished my homework yet.5. 情态动词1 情态动词本身有一定的词义，表示说话人的情绪、态度或语气，但不能单独作谓语，只能与其他动词构成谓语。常见的有：can

7、could, may might, must, need, shall should, will would等。2 情态动词无人称和数的变化, 后接动词原形。否认式是在情态动词后面加not。个别情态动词有过去式形式, 可用来表达更加客气、委婉的语气。 e.g. Ken can climb up the tress like a koala. Tracy could ride a bicycle when she was five years old. You mustnt play with fire. It is dangerous.中考链接1. Paul, Im busy cooking.

8、 Can you give me a hand? Just a minute. I _ my e-mail. 2019 河南 A. am checking      B. will check        C. have checked        D. was checking    2. Dont take the dictionary away, I _ it. 2019 河北

9、 A. use      B. used        C. am using        D. have used      3. The mobile phone _ in 1973.  2019 北京 A. invents     B. is invented     &

10、#160;  C. invented        D. was invented     4. Lets wait and see whether books _ by the Internet in the future.  2019 天津 A. replace     B. replaced        C. will be replaced  &#

11、160;    D. were replaced5. Why are you leaving your job? I cant stand it any longer. I _ always _ to work overtime. 2019 河南 A. am; asking  B. am; asked        C. was; asking        D. was; asked6. Lily is my classma

12、te. We _ each other since she came to our school.  2019 北京 A. know    B. knew       C. have known       D. will know      7. I _ in the city since I left school.  2019 天津 A. live  

13、  B. will live       C. was living       D. have lived     8. In the past few years, many schools _ the ways of doing morning exercises.  2019 重庆 A. change    B. changes     &

14、#160; C. will change      D. have changed  9. _ I park my car here for a while? No, you mustnt. Do you see the sign “NO PARKING?  2019 上海 A. Would      B. May         C. Must     &

15、#160;  D. Should     10. May I take the dog with me, sir? _. Pets are not allowed to enter the hall. 2019 重庆 A. Yes, you may   B. No, you mustnt C. Yes, you can D. No, you neednt  11. I dont care what people think. Well, you _. Youre not alone in this world.  2019 河南 A. can       B. may