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1、八年级下册英语unit1知识点讲解及练习一(一般将来时的讲解及用法 一般将来时主要有以下几种表现形式: 由助动词shall或will加动词原形构成，shall 用于第一人称，will用于第二、三人称。除英国外的说英语的国家，在陈述句中，即使在第一人称一般也用will，在英国也有这种趋势。在口语中，常用shall, will的缩写形式为ll, 如:Ill, youll等。Shall not的缩写为:shant, will not 的缩写为:wont. 肯定句:I/We shall/will go. You/He/She/They Will go. 否定句:I/We shall/will not
2、go. You/He/She/They Will not go. 疑问句:Shall I/we go? Yes, I/we shall. No, I/we shant. Will you/he/she/they go? Yes, I/he/she/they will. No, I/he/she/they wont. 一般将来时标志性的时间:1.含tomorrow; next短语;2.in+段时间 ;3.how soon;4.by+将来时间;5.祈使句句型中:or/and sb. will do (1)一般将来时表示将要发生的动作或情况。 例如:I will(shall) arrive tomo
3、rrow. Will you be free tonight? We wont (shant) be busy this evening. (2)在一般将来时的句子中，有时有表示将来时间的状语，有时没有时间状语，这时要从意思上判断是否指未来的动作或情况。 a.用在I think.will这类句型中，表示看法: I think theyll succeed. Im sure hell come back. b.表示未来习惯性的动作: Spring will come again. Birds will build nests. c.表示提出请求: Will you help me do this
4、? Will you tell her Ill be back at five? d.表示做出允诺: Ill be there, I promise you. I wont tell anybody what you said. e.表示同意: Send off the invitation right today. -Yes, I will. Dont be late. -Yes, I wont. (3)在以第一人称I或we作主语的问句中，一般使用助动词shall，这时或是征求对方的意见(a)，或是询问一个情况(b): a. Where shall we meet? b. Shall we
5、have any classes tomorrow? (4)be going to+动词原形 a.表示打算、准备做的事。 We are going to put up a building here. How are you going to spend your holidays? b.表示即将发生或肯定要发生的事。 I think it is going to snow. Theres going to be a lot of trouble about this. (5)如何比较be going to 与will的使用: ?be going to 表示近期、眼下就要发生的事情，will
6、表示的将来时间则较远一些。 He is going to write a letter tonight. He will write a book one day. ?be going to 表示根据主观判断将来肯定发生的事情，will表示客观上将来势必发生的事情。 He is seriously ill. He is going to die. He will be twenty years old. ?be going to 含有计划，准备的意思，而 will 则没有这个意思， She is going to lend us her book. He will be here in hal
7、f an hour. ?在有条件从句的主句中，不用 be going to, 而用will, If any beasts come at you, Ill stay with you and help you. (6)进行时态表将来:在英语中有一些词如go, come, arrive, leave等表示位移的动词，我们常用它的进行时态表示将来。 I am leaving here for Beijing tomorrow. He is coming back the day after tomorrow. (7)There be 句型的一般将来时: There will be There be
8、 going to be There will be more people in the future. There is going to be a football match tomorrow. There are going to be more trees in ten years. 二(条件状语从句的讲解: if 引导的条件状语从句中，主句用将来时态，从句用现在时态。If是连词，所连接的句子 叫条件状语 从句，表示假设或条件，意思是 如果的话 。 常见的主将从现连接词:if，as soon as, unless Ill go with you as soon as I finis
9、h my work. ?表示假设，表示将会发生和可能发生的事，或进行提醒警告。句子结构如下: If +句子(一般现在时)，+主句(主语will/may/can) +动词) a. If you finish your homework, you can go out and play. b. If I have enough money next year, I will go to travel. ?表示真实条件、客观真理、自然现象、定理定义 、民间谚语等，句型是: If + 句子 (一般现在时 )，+ 主句 ( 一般现在时). If you study hard, you are sure
10、to succeed. If a glass falls on the floor, it usually breaks 练习: 一(选择填空 1. He _ very busy this week, he _ free next week. A. will be; is B. is; is C. will be; will be D. is; will be 2. - Dont forget to ask him to write to me. - I wont. As soon as he _, Ill ask him to write to you. A. will come B. ca
11、me C. comes D. is coming 3. Frank _ to see his grandma if he _ free tomorrow. A. will come; will be B. comes; is C. will come; is D. comes; will be 4. There _ robots in 100 years, I think. A. will have B. is going to have C. be D. are going to be 5. There _ a talk on science in our school next Monda
12、y. A. will give B. will be C. is going to give D. is 6. Will people live to be 300 years old? _. A. No, they arent B. No, they wont C. No, they dont D. No, they cant 7. I will see you again _. A. a day B. every day C. one day D. everyday 8. -I dont know if it _ tomorrow. -The students will not go to
13、 the Summer Palace if it _ tomorrow. A. rains; will rain B. rains; rains; C. will rain; will rain D. will rain; rains 9. - Come back home every month. - I _. A. will B. must C. should D. can 10. A robot _ think of itself; it _ be told what to do. A. cant; must B. couldnt; can C. may not; will D. mus
14、tnt, may 11. Frank _ to see his grandma if he _ free tomorrow. A. will come; will be B. comes; is C. will come; is D. comes; will be 12. There _ a talk on science in our school next Monday. A. will give B. will be C. is going to give D. is 13. - Shall we go shopping now? - Sorry, I cant. I _ my shir
15、ts. A. wash B. washes C. washed D. am washing 14. I believe that those mountains _ with trees in a few years time. A. are covered B. will be covered C. are covering D. will cover 15. - Come back home every month. - I _. A. will B. must C. should D. can 16. He _ very busy this week, he _ free next we
16、ek. A. will be; is B. is; is C. will be; will be D. is; will be 17. He _ in three days. A. coming back B. came back C. will come back D. is going to coming back 18. Three trees will be planted next year. A. hundreds B. hundred C. hundred of D. hundreds of 19. They _ an English evening next Sunday. 5
17、、多一份关心、帮助，努力发现他们的闪光点，多鼓励、表扬他们，使其体验成功、努力学习。A. are having B. are going to have C. will having D. is going to have 20. Shall I come again tomorrow afternoon? _ (好的). 等弧：在同圆或等圆中，能够互相重合的弧叫做等弧。A. Yes, please B. Yes, you will. C. No, please. D. No, you wont. （2）顶点式：二(填词 1. They _ (not have) any classes nex
18、t week. 2. Betty _ (write) to her parents tomorrow. 3. Look at those clouds. It _(rain). 4. He _ (read) an English book now. 5. Look! Many girls _(dance) over there. 6. If it _ (be) fine tomorrow, Ill go with you. 7. If you put ice in a warm place, it_ (turn) into water. 8. If you cook a banana, it_
19、 (become) very soft. 9. I (leave) in a minute. I (finish) all my homework before I (3) 扇形的面积公式:扇形的面积 (R表示圆的半径, n表示弧所对的圆心角的度数)(leave) 10. Im afraid there (be) a meeting this afternoon. I cant join you. 三、句型转换。 1. People in the north often go skating in winter. (next winter) 2. There are two cinemas i
20、n that town. (next year) 11.弧长及扇形的面积3. He comes back late.(in two days) 4. She is a conductor of a train.(soon) 5. There is much pollution in the city. (in the future) 四(选词填空 二次方程的两个实数根A few, few, a little, little, more, fewer, less 1. She is very alone, she has friends. 2. We have money, we hardly
21、buy anything. 3. There will be (更多) people in the future. 4. There will be (更少) trees in the future. 5. There will be (更少) free time in the future. 5、多一份关心、帮助，努力发现他们的闪光点，多鼓励、表扬他们，使其体验成功、努力学习。答案: 30 o45 o60 o一(DCCDB BCDAA CBDBA DCBBA 二(1.wont have, 2.will write, 3.is going to rain, 4.is reading, 5.ar
22、e dancing, 6.is, 7.turns, 8.becomes. 9.am leaving, will finish, leave 三( 1. People in the north will go skating next winter. 2. There will be two cinemas in that town next year. 3. He will come back late in two days. 推论1: 同弧或等弧所对的圆周角相等。4. She will be a conductor of a train soon. 应用题5. There will be more pollution in the city in the future. 四(Few, little, more, fewer, less