8A Unit6 语法突破练习过去进行时(1）概念：表示过去某时正在进行的状态或动作。 (2）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。(3) 常用的时间状语 this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while经典句子读读看：1He was writing a letter the whole of afternoon.2。I was reading the book at that time.3What were you doing at 8:30 last night?4He broke a chair while he was jumping up and down5I saw him while I was walking to the station. 6I was cooking the dinner while he was playing the piano.(平行) 7I cooked the dinner while he played the piano. 8He was cleaning his car while I was cooking.9While he was waiting for the bus, he was reading a newspaper.10When I saw him， he was cleaning his room.11What was she doing at nine oclock yesterday?12When I got to the top of the mountain, the sun was shining. 13It was raining when they left the station14My brother fell while he was riding his bicycle and hurt himself. 15We were watching TV from seven to nine last night. 16He was reading a novel when I found him.17When I came home, my wife was cooking dinner一、按要求进行句型转换。1. We were having a PE class at four yesterday afternoon.(改为否定句)We _ _ a PE class at four yesterday afternoon.2. Kate was reviewing her lessons at eight last night.(改为一般疑问句，做肯，否回答，对划线部分提问)3. He ran in the park .(用 at this time yesterday 改写)4. They were playing computer games at nine last night.(划线部分提问) 5. I was reading a novel at three yesterday afternoon.( 对划线部分提问) 二、用适当的形式填空1My brother came into the bedroom while I _(dance).2 _ he _(lie) on the ground at nine yesterday evening ?3What _Jim _(write) when the teacher came in ?4Mike and I _ (play) baskteball at that time yesterday afternoon.5My brother _ (fall) while he _ (ride) his bicycle and hurt himself.6 I first met Lisa three years ago. She _ (work) at a radio shop at the time.7.When I arrived at his office , he _on the phone.(speak)8. Jane_(wait) for me when I _(arrive).9. Sue wasnt hungry, so she _ anything. (eat)10. It was hard work carrying the bags. They _very heavy.(be)11.When I was young, I_(want) to be a bus driver.12. The Reads _ (not have) lunch when I got to their house. 难点突破： 以 when 和 while 引导的时间状语从句when 与 while 区分：(1) “当 的时候”,如后面连接的动词为进行时态,则用 while 多于用 when。而 when 通常与瞬间性动词或延续性不强的动词连用。如： The girl was shopping when the alien got out. While the girl was shopping, the alien got out.(2) 如果 while 前后的动词都是进行时态,while 可译为“ 与此同时” I was reading while my brother was drawing.(3) 当 while 前后的句子描述的情况相对或相反,while 可译为“ 而”,while 更强调并列的对比而非转折。e.g. I am outgoing while my sister is quiet and shy.【拓展】延续性动词和非延续性动词延续性动词指动作可以延续一段时间，而不是瞬间结束。如：work 、study 、drink、eat 等。 非延续性动词指动作极为短暂，瞬间结束。如：start、begin、hit、练习：用 when while 完成下列句子:1 What were you doing _ Yang Liwei went into space?2 _ I was walking to the mall yesterday I met George.3 _ you called, I was taking a shower.4 Tim was riding his bicycle _he saw the alien.5 We arrived in Beijing _ it was snowing.6 Where were you going _ you had the accident?一、选择填空( )1.What _ you _ when your mother came back? A. are; doing B. were; doing C. was; doing( )2.Helen _ Tom with his lessons at 8 last night. A. was helping B helped C. is helping ( )3.Mr Brown_ a newspaper at 9：00 yesterday evening. A. is reading B. was reading C. were reading( )4.He was watching TV_ his son was doing his homework. A. while B. when C. during( ) 5.We were having a meeting _ we heard a shout for help. A .while B. as C. when( ) 6.My mother _ in the kitchen when the phone rang. A. is B. is cooking C. was cooking( )7.When the UFO arrived, I _. A. am walking B. was walking C. walked D. walking( )8.While she _, I was watching TV. A. was working B. worked C. works D. is working( )9.What _ you _ when it began to rain? A. are, doing B. did, do C. were, doing D. were, do( )10.I was watching TV _ the thief came into the house. A. when B. while C. for D. because二、句型转换1. I was eating lunch when the UFO arrived.（否定）I_ _lunch when the UFO arrived.2. The girl was shopping when the alien got out.（一般疑问句_ the girl _when the alien got out?3. The Greens were watching TV at 8:00 yesterday.（划线提问）_ _ the Greens_ at 8:00 yesterday?4.He finished his homework last night.（就划线部分提问）_ _ he_last night?5.They swam in the river.（用 at this time yesterday 改写）They_ _ in the river at this time yesterday.6 .I was doing my homework. My father came back from work.（合为一句）I was doing my homework_ my father came back home.或 _ I was doing my homework，my father came back home.三、用所给词的正确形式填空.1. Mary