八年級下冊英語unit1知識點講解及練習(xí).doc

一一般將來時的講解及用法一般將來時主要有以下幾種表現(xiàn)形式：由助動詞shall或will加動詞原形構(gòu)成，shall 用于第一人稱，will用于第二、三人稱。除英國外的說英語的國家，在陳述句中，即使在第一人稱一般也用will，在英國也有這種趨勢。在口語中，常用shall, will的縮寫形式為ll, 如：Ill, youll等。Shall not的縮寫為:shant, will not 的縮寫為：wont.肯定句：I/We shall/will go.You/He/She/They Will go.否定句：I/We shall/will not go. You/He/She/They Will not go.疑問句：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.一般將來時標(biāo)志性的時間：1.含tomorrow; next短語；2.in+段時間 ；3.how soon；4.by+將來時間；5.祈使句句型中：or/and sb. will do（1）一般將來時表示將要發(fā)生的動作或情況。例如：I will(shall) arrive tomorrow. Will you be free tonight? We wont (shant) be busy this evening. （2）在一般將來時的句子中，有時有表示將來時間的狀語，有時沒有時間狀語，這時要從意思上判斷是否指未來的動作或情況。a.用在“I think.will”這類句型中，表示看法： I think theyll succeed. Im sure hell come back.b.表示未來習(xí)慣性的動作： Spring will come again. Birds will build nests.c.表示提出請求： Will you help me do this? Will you tell her Ill be back at five?d.表示做出允諾： 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）在以第一人稱I或we作主語的問句中，一般使用助動詞shall，這時或是征求對方的意見(a)，或是詢問一個情況(b)： a. Where shall we meet? b. Shall we have any classes tomorrow?（4）be going to+動詞原形a.表示打算、準(zhǔn)備做的事。We are going to put up a building here.How are you going to spend your holidays? b.表示即將發(fā)生或肯定要發(fā)生的事。I think it is going to snow. Theres going to be a lot of trouble about this.（5）如何比較be going to 與will的使用:be going to 表示近期、眼下就要發(fā)生的事情，will 表示的將來時間則較遠(yuǎn)一些。He is going to write a letter tonight. He will write a book one day.be going to 表示根據(jù)主觀判斷將來肯定發(fā)生的事情，will表示客觀上將來勢必發(fā)生的事情。 He is seriously ill. He is going to die. He will be twenty years old.be going to 含有“計劃，準(zhǔn)備”的意思，而 will 則沒有這個意思， She is going to lend us her book. He will be here in half an hour.在有條件從句的主句中，不用 be going to, 而用will, If any beasts come at you, Ill stay with you and help you.（6）進(jìn)行時態(tài)表將來：在英語中有一些詞如go, come, arrive, leave等表示位移的動詞，我們常用它的進(jìn)行時態(tài)表示將來。 I am leaving here for Beijing tomorrow. He is coming back the day after tomorrow.（7）There be 句型的一般將來時： There will be There be 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.二條件狀語從句的講解：if 引導(dǎo)的條件狀語從句中，主句用將來時態(tài)，從句用現(xiàn)在時態(tài)。If是連詞，所連接的句子 叫條件狀語 從句，表示假設(shè)或條件，意思是“ 如果的話” 。常見的主將從現(xiàn)連接詞：if，as soon as, unlessIll go with you as soon as I finish my work.表示假設(shè)，表示將會發(fā)生和可能發(fā)生的事，或進(jìn)行提醒警告。句子結(jié)構(gòu)如下： If +句子（一般現(xiàn)在時），+主句（主語will/may/can) +動詞） 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.表示真實條件、客觀真理、自然現(xiàn)象、定理定義 、民間諺語等，句型是： If + 句子 （一般現(xiàn)在時 ），+ 主句 （ 一般現(xiàn)在時）.If you study hard, you are sure to succeed. If a glass falls on the floor, it usually breaks 練習(xí)：一選擇填空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 be2. - 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. came C. comes D. is coming3. Frank _ to see his grandma if he _ free tomorrow.A. will come; will be B. comes; is C. will come; is D. comes; will be4. There _ robots in 100 years, I think.A. will have B. is going to have C. be D. are going to be5. There _ a talk on science in our school next Monday.A. will give B. will be C. is going to give D. is6. 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 the Summer Palace if it _ tomorrow. A. rains; will rain B. rains; rains; C. will rain; will rain D. will rain; rains9. - Come back home every month. - I _.A. will B. must C. should D. can10. A robot _ think of itself; it _ be told what to do.A. cant; must B. couldnt; can C. may not; will D. mustnt, may11. Frank _ to see his grandma if he _ free tomorrow.A. will come; will be B. comes; is C. will come; is D. comes; will be12. 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 shirts.A. wash B. washes C. washed D. am washing14. I believe that those mountains _ with trees in a few years time.A. are covered B. will be covered C. are covering D. will cover15. - Come back home every month. - I _.A. will B. must C. should D. can16. He _ very busy this week, he _ free next week. A. will be; is B. is; is C. will be; will be D. is; will be17. He _ in three days. A. coming back B. came back C. will come back D. is going to coming back18. Three trees will be planted next year. A. hundreds B. hundred C. hundred of D. hundreds of 19. They _ an English evening next Sunday. A. are having B. are going to have C. will having D. is going to have20. Shall I come again tomorrow afternoon? _ （好的）. A. Yes, please B. Yes, you will. C. No, please. D. No, you wont.二填詞1. They _ (not have) any classes next 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_ (become) very soft.9. I (leave) in a minute. I (finish) all my homework before I (leave)10. Im afraid there (be) a meeting this afternoon. I cant join you.三、句型轉(zhuǎn)換。1. People in the north often go skating in winter. （next winter）2. There are two cinemas in that town. （next year）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)四選詞填空A few, few, a little, little, more, fewer, less1. She is very