现在完成时UnitB.pptVIP

现在完成进行时 现在完成进行时表示动作从过去某一时间 一直延续到现在或离现在不远的时间。 其动作是否延续下去, 则由上下文而定。 现在完成进行时多用持续性动词如live, learn, lie, stay, wait, stand, rest, study等, 常和all the time, this week, this month, all night, all the morning, recently 等状语以及 since 和 for 引导的时间状语或从句连用。 现在完成进行时 1. 构成形式: 2) 叙述“最近”一直从事的工作或活动。 lately, recently You have been studying for four straight hours. Why don’t you take a break? The telephone has been ringing for almost a minute. Why doesn’t someone answer it? 现在完成进行时与现在完成时的区别 1. China sent up Shenzhou V manned spaceship into space successfully, which shows science and technology ________ rapidly in China. A. have been developing B. develops C. is developing D. had developed 2. Mrs. White became a teacher in 1985. She ______ for twenty years by next summer. A. will teach B. would have taught C. has been teaching D. will have been teaching 3. --Hi, Tracy, you look tired. --I am tired. I _________ the living room all day. A. painted B. had painted C. have been painting D. have painted 4. The two friends ________ on the Internet for three hours, and they would go on till the next morning. A. had been chatting B. had chatted C. were chatting D. have been chatting 5. Now that she is out of a job, Lucy ________ going back to school, but she hasn’t decided yet. A. had considered B. has been considering C. Considered D. is going to consider 6. ----How long _________ in the factory? ----Since 1990. A. were you working B. have you been working C. had you been working D. will you work 7. The first use of atomic weapons was in 1945, and their power _______ increased enormously ever since. A. is B. was C. has been D. had been 8. ----Hi, Alan, I have’t seen you for weeks. What _________ r