时间状语从句的总结

1. when/while/as e.g. When I came in, he was lying on the bed, staring at the ceiling.（非延；同时） e.g. He came across a friend when he was walking on the street.（延续；同时） e.g. When I sat down, I found a silver coin on the ground.（非延；同时） e.g. The students stopped talking when the teacher came in.（非延；同时） e.g. I used to go fishing when I lived in the countryside.（延续；同时） e.g. When they had finished their task, they went out to play.（非延；先） e.g. He picked up some dialects while he was traveling there.（延续；同时） e.g. He was knocked down while he was crossing the street.（延续；同时） e.g. Tom sings as he walks. （一边一边）e.g. As we were going out, it began to rain.（动作几乎同时发生，非常紧凑）e.g. Just as I patted on her shoulder, she gave out a scream.（动作一先一后但很紧凑）e.g. As time went on, their hope faded. As spring comes, flowers come out.（随着）e.g. We become wiser as we grow older.（随着） Summary: “when”引导的从句的谓语动词能够是延续性的（此时能够和 “while”互换）也能够是非延续性的，其动作能够和主句的动作同时发生，也能够先予主句发生。 “while”引导的从句的谓语动词是延续性的，表示主句动作和从句动作同时发生。 “as”表示“一边一边”或“随着”，也可强调两个动作几乎同时发生或一先一后非常紧凑。 Other functions: A. “when”: sb was doing sth when ; sb was going to do sth when ; sb was about to do sth when sb was on the point of doing sth when ; sb was ready to do sth when ; sb had hardly done sth when ; Hardly had sb done sth when B. “while”: I am watching TV while she is doing her homework.C. Also rail travel is very safe and I am never sick on a train, _ I am on a ship! A. when B. while C. as D. andExercises 1. Mother was worried because little Alice was ill, especially _ Father was away in France.A. asB. thatC. duringD. if 2. Im going to the post office.-_you are there, can you get me some stamps? A. WhileB. BecauseC. IfD. Since 3. As she _ the newspaper, Granny _ asleep.A. read; was fallingB. was reading; fellC. was reading; was fallingD. read; fell 4. Can I join your club, Dad? -You can when you _ a bit older.A. getB. will getC. are gettingD. will have got 5. When will come to see me, Dad? -I will go to see you when you _ the training course.A. will have finishedB. will finishC. are finishingD. finish6. He was about to tell me the secret _ someone patted him on the shoulder/A. as B. until C. while D. when7. Dont be afraid of asking for help _ it is needed.A. unless B. since C. although D. when8. We were swimming in the lake _ suddenly the storm started.A. when B. while C. until D. before9. Jasmine was holidaying with her family in a wildlife park _ she was bitten on the leg by a lion.A. when B. while C. since D. once 10. You can eat food free in my restaurant _ you like.A. whatever B. wherever C. whenever D. however11. He transplanted the little tree to the garden _ it was the best time for it.A. where B. when C. that D. until12. Did Jack come back early last night? -Yes. It was not yet eight oclock _ he arrived home.A. before B. when C. that D. until13. I had just stepped out of the bathroom and was busily drying myself with a towel _ I heard the steps.A. while B. when C. since D. after14. How can you expect to learn anything _ you never listen? A. in case B. even if C. unless D. when15. He was about half way through his meal _ a familiar voice came to his ears.A. why B. where C. when D. while16. Excuse me. Did you notice whether the No. 108 bus had gone by? -Not _ Ive been standing here.A. as B. when C. since D. while17. We were just _ calling you up _ you came in.A. about; when B. on the point of; while C. on the point of; when D. on the point of; as18. He never thought that his success came _ he least wanted it. A. while B. when C. until D. since19. _ time going on, his memory of the past faded.A. As B. WhenC. WithD. While2. after/before e.g. The house tumbled down before he rushed out.（来不及就） e.g. The war lasted four years before the North won.（直到） e.g. It will be many years before we find cure for AIDS.（之后） e.g. I hadnt waited long before he came.（没就） e.g. Go before I change my mind.（否则） e.g. I will die before I surrender.（宁可也不） e.g. After I had finished my homework, I went out to play.（能够和 “when”互换） e.g. Ill go to see you after I get my hair cut. （能够和 “when”互换）Exercises:1. _ three years study in this school he entered a famous university and he will graduate _ two years.A. In; after B. In; in C. After; after D. After; in 2. He will be back _ three oclock.A. inB. afterC. forD. on 3. The doctor will be free _.A. ten minutes laterB. after ten minutesC. in ten minutesD. ten minutes after 4. He made a mistake, but then he corrected the situation _ it got worse.A. until B. when C. before D. as5. It was evening _ we reached the little town of Winchester.A. that B. until C. since D. before6. Scientists say it may be five or six years _ it is possible to test this medicine on human patients.A. since B. after C. before D. when7. The American Civil War lasted four years _ the North won in the end.A. after B. when C. before D. then8. How long do you think it will be _ China sends a manned spaceship t the moon? -Perhaps two or three years. A. when B. until C. that D. before9. Why didnt you tell him about the meeting? -He rushed out of the room _ I could say a word.A. before B. until C. when D. after10. Why didnt you help the little boy? -Oh sorry. He had struggled to his feet _ I ran over.A. before B. after C. until D. since11. When Edison invented the light bulb, he tried over 2000 experiments _ be got it to work.A. as B. after C. when D. before12. “Go out _ I change my mind!” his father shouted angrily.A. before B. when C. while D. until13. Someone called me up in the middle of the night, but he hung up _ I could answer the phone.A. as B. sinceC. untilD. before Question: In exe.4, why not choose “C”?3. till/until/not until e.g. I didnt go to bed until my mother returned. e.g. I waited until my mother returned.“until”引导的从句若是和肯定的主句连用，则主句的谓语动词应该是延续性的，表示该动作的结束。 若是和否认的主句连用，则主句的谓语动词应该是非延续性的，表示该动作的开始。例如：She slept till/until nine. She didnt sleep till/until nine.Exercises: 1. My uncle _ until he was forty-five.A. marriedB. didnt marryC. was not marriedD. would marry 2. Was his father very strict with him when he was at school? -Yes. He had never praised him _ he became one of the top students in the grade.A. afterB. unless C. untilD. when 3. They _ the train until it disappeared in the distance.A. sawB. watchedC. noticedD. observed 4. Mother told Jim to _ the milk until it boiled and then turn off the gas.A. observeB. watchC. noticeD. glance 5. A good storyteller must be able to hold his audiences curiosity _ he reaches the end of the story.A. whenB. unlessC. afterD. until 6. Dont get off the bus until it _.A. has stoppedB. stoppedC. will stopD. shall stop 7. It has been announced that candidates shall remain in their seats until all the papers have been collected. 8. Not until I began to work _ how much time Id wasted.A. didnt I realizeB. did I realizeC. I didnt realizeD. I realized 9. It was not _ she took off her dark glasses _ I realize she was a famous film star.A. when; thatB. until; thatC. until; whenD. when; then10. We were told that we should follow the main road _ we reached the central railway station.A. whenever B. until C. while D. wherever11. “You cant have this football back _ you promise not to kick it at my cat again,” the old man said firmly.A. because B. since C. when D. until4. since e.g. Its years since he smoked. e.g. It has been many years since I was last in London. e.g. They have been friends since met in Shanghai.Exercises:1. It is almost five years _ we saw each other last time.A. before B. after C. when D. since2. It is weeks since _. -So it is. Wed better ask someone else to help us.A. fell ill B. was ill C. is ill D. has been ill3. What was the party like? -Wonderful. Its years _ I enjoyed so much. A. afterB. beforeC. whenD. since5. immediately/directly/instantly/as soon as6. by the time e.g. By the time I arrived, they had gone for a long time. e.g. By the time the doctor arrived, the patient had died.Exercises: 1. By the time he was twelve, Edison _ to make a living by himself. A. would beginB. has begunC. had begunD. was begun7. the moment/the instant/the minute/the first time/the last time e.g. We became friends the first time we met each other. e.g. It is the first time I have been here. e.g. It was the first time I had been here. e.g. It will be the first time I have been here.Exercises: 1. Do you know our town at all? -No. This is the first time I _ here. A. was B. have beenC. came D. am coming2. I thought her nice and honest _ I met her. A. first timeB. for the first timeC. the first timeD. by the first time8. “as long as” e.g. You can stay here as long as you like. e.g. You can keep this book as long as you like. e.g. As long as it doesnt keep me awake at night, I dont see any harm in drinking tea.9. “once”Exercises: The research is so designed that once _ nothing can be done to change it. A. beginsB. having begunC. beginningD. begun123