过去进行时一 概念：过去进行时主要表示过去某个时刻或某一阶段正在进行的动作，常和表示过去的时间状语then，at that time/ moment， yesterday，at nine，last night等连用或者与when, while, as引导的过去时间状语连用。但在不少情况下，没有表示时间的状语，这时需要通过上下文来表示。We were watching TV from seven to nine last night. What was he researching all day last Sunday? 二过去进行时的主要用法是描述一件事发生的背景；一个长动作发生的时候，另一个短动作发生（长动作用过去进行时，短动作用一般过去时）。也可以表示两个动作同时发生，此时均用过去进行时When I saw him he was cleaning his room. While he was waiting for the bus, he was reading a newspaper. He was cleaning his car while I was cooking.三When/ While“当的时候”的区别when 既指时间点，也可指段时间，while只指段时间，因此when引导的时间状语从句中的动词可以是短暂性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。 when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主从句动作同时发生。 They were singing while we were dancing. when和while 还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如： a. The children were playing when they heard the sound of a motor bike. b. He is strong while his brother is weak. 典型例题1) Mary _ a dress when she cut her finger. A. made B. is making C. was making D. makes2) As she _ the newspaper, Granny _ asleep. A.read； was falling B. was reading； fell C. was reading； was falling D. read；fell 四、 通常不能用于过去进行时的动词主要有：agree, be, believe, belong, care, forget, hate, have(拥有), hear, know, like, love, mean, mind, notice, own, remember, seem, suppose, understand, want, wish等。例如： 误：I was knowing the answer. 正：I knew the answer. 误：I wasnt understanding him. 正：I didnt understand him. 相关习题I.用所给词的适当形式填空：1. While we _ (wait) for the bus, a girl _ (run) up to us.2. I _ (telephone) a friend when Bob _ (come) in.3. Jim _ (jump) on the bus as it _ (move) away.4. We _ (test) the new machine when the electricity _ (go) off.5. She _ (not want) to stay in bed while the others _ (all, work) in the fields.II.单项选择.1.    I _ a meal when you _ me.A. cooked, were ringing         B. was cooking, rang     C. was cooking, were ringing        D. cooked, rang2.    He said he _ to draw a plane on the blackboard at that time.A. tries            B. tried           C. was trying          D. will try3.    While she _ TV, she _ a sound outside the room.A. was watching, was hearing        B. watched, was hearingC. watched, heard                        D. was watching, heard4.    They _ a football game from 7 to 9 last night.A. were watching           B. watch         C. watched      D. are watching5.    What book _ you _ when I _ you at four yesterday afternoon?A. did, read, was seeing                B. did, read, sawC. were, reading, saw                  D. were, reading, was seeing