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基础知识精讲一、动词的时态英语时态共有十六种,其中常用的有八种(一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、过去完成时和过去将来时)二、动词时态表(以Do 为例)三、常用时态的基本用法1.一般现在时1) 经常性或习惯性的动作,常与表示频度的时间状语连用Eg. I leave home for school at 7 every morning.2) 客观真理,客观存在,科学事实Eg. The earth moves around the sun.3)表示格言或警句Eg. Pride goes before a fall.(骄必败)4)现在时刻的状态、能力、性格、个性Eg. I dont want so much.5)某些动词,如come, go, move, stop, leave, arrive, be, finish, continue, start 等,在一般现在时句中可用来表示将来肯定会发生的动作Eg The train comes at 3 oclock.6)在状语从句中用一般现在时代替一般将来时Eg. Ill help you as soon as you have problem.2.一般过去时表示过去某一时刻或某一时段内所发生的动作或情况。通常,一般过去时带有表示动作发生的时间的词、词组或从句,如yesterday, the day before yesterday, last week, two days ago 等。上下文清楚时可以不带时间状语。注意1) 过去经常、反复发生的动作,也可用used to 和would 加动词原形来表达Eg. I used to go fishing on Sundays.2)used to 也可用于表示过去曾经存在过的状态Eg. This river used to be clean.3.一般将来时1)表示将来的动作或状态Eg. I shall attend the meeting tomorrow.2)表示将来反复发生的动作或存在的状态Eg. He will go to see his mother every Saturday.3)表示将来的意愿、决心、许诺、命令等时常用will;征求对方意见,主语是第一人称时,常用shall.Eg. I will do my best to catch up with them.时间状态一般进行完成完成进行现在Do/does Is/am/are doing Have/has done Have/has beendoing过去Did Was/were doing Had done Had been done将来Will/shall do Will/shall bedoingWill/shall havedoneWill/shall havebeen doing过去将来Would/should do Would/should bedoingWould/shouldhave doneWould/shouldhave been doing4)be going to do 也是一种将来时的句型,表示打算、计划最近或将来要做某事(通常表示有一定迹象)。Eg. Look at the black clouds. Its going to rain.5)be to do 表示有职责、义务、可能、约定、意图等Eg. There is to be a meeting this afternoon.6)be about to do 表示马上、很快就要做某事。Eg. They are about to leave.4.现在进行时1)现在进行时表示说话者说话时正在发生或者进行的动作,它注重现在进行的动作,而不管动作从什么时间开始,倒是么时候结束Eg. I am doing my homework.2)表示说话时现阶段正在进行的动作或存在的状态Eg. The students are preparing for the examination.3)一些动词,如arrive, come, leave, start 等现在进行时可以表示即将发的动作。Eg. They are going to HK tomorrow.4)一些动词不可以用于现在进行时状态类:be, have认知类:know, think ,hear, find, see情感类:like, want wish prefer5.现在完成时&过去完成时1)现在完成时表示在说话之前已经完成或刚完成的动作Eg. I have bought a ten-speed bicycle.2)现在完成时表示动作从过去开始持续到现在,或者还有可能持续下去的动作或状态。Eg. We have lived here since 1976.3)有些表示瞬间的动词或短语与段时间连用要做相应变化1. have arrived at/in sw. got to/reached sw. come/gone/moved to sw.have been in sw./at相应的介词2. have come/gone back/returned have been back3. have come/gone out have been out4. have become have been5. have closed / opened have been close/ope n6. have got up have been up;7. have died have been dead;8. have lef t sw. have been away from sw.9. have fallen asleep/got to slee p have been asleep;10. have finished /ended/completed have been over ;11. have married have been married ;12. have started/begun to do sth. have done sth. ;13. have begun have been on14. have borrowed/bought have kept/had15. have lost havent had16. have put on have worn17. have caught /get a cold have had a cold ;18. have got to know have known19. have/has gone to have been in20. have joined /have taken part in the league/the Party/the armyhave been a member of/ have been in/have been the Partys member/the leaguemember/the sold ier6.过去进行时表示过去某时刻正在做的事Eg. I was watching TV when she came to see me.7.过去完成时表示过去某一时刻之前发生的事或状态,即“过去的过去”句中一定要有过去时作衬托或有By +过去某一时刻才能使用。Eg. We had already le arned two thousand words by the end of last year.【时态专项训练】1( ) 1 -He came early this morning, didnt he?-Yes, he did. He often_ to school early.A. come B. comes C. came D. has come( ) 2 Ann _ her hair every week.A. is going to wash B. wash C. washes D. is washing( ) 3 They usually_ TV in the evening.A. watch B. will watch C. are watching D. watches( ) 4 The sun _ in the east and_ in the west.A. raises; set B. rise; sets C. rises; sets D. rises; set( ) 5 Miss Gao_ English on the radio every morning.A. had studied B. studies C. study D. studied( ) 6 Our teacher will return by the time schoolA. will begin B. began C. is beginning D. begins2( ) 1 -I usually have milk and bread for breakfast. What about you, Jim?-So do I, but my sister _.A. hasnt B. doesnt C. didnt D. wont( ) 2 -That ten pound note belongs to me.A. Yes, it belongs B. No, it doesnt C. Yes, it is D. No, it isnt( ) 3 She will go if it _ tomorrow.A. isnt rain B. dont rain C. doesnt rain D. didnt rain3( ) 1 -_ they often _ these old men?-Yes, they_.A. Do; help; are B.Are; helping; areC. Do; help; do D. Are; helped; are( ) 2 -_ he _ to work on foot?-Yes, he_.A. Do; go; do B. Does; go; doesC. Is; going; does D. Does; go; is( ) 3 _ you _ some speaking in English every day?A. Is; speaking B. Do; do C. Do; does D. Does; do4( ) 1 How _ it in English?A. you say B. do you say C. to speak D. about talk ( ) 2 _ you _ to school every day?A. When; go B. When do; go . C. When did; go D. Does; go( ) 3 _ the
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