江苏省扬中市同德中学八年级英语上册 8A Unit8 Natural disasters 导学案5（无答案）（新版）牛津版(1).doc

8a unit8 natural disasters 【学习目标】1.继续学习过去进行时；2.学习连词as，while 和when 在过去进行时中的应用。【学习重点、难点】as，while 和when 在过去进行时中的应用【学习过程】when, while, as 都有“当.的时候”。1. while指一段时间，它所引导的从句中的谓语动词必须是延续的，不可以是瞬间性的动词，如：while he reached there，they were playing basketball. ()while i was waiting for a bus, i met my cousin. ()当强调两个延续性的动作同时发生时，常用“过去进行时+while+过去进行时”e.g. 当他在打电话的时候，我在写信。 i _ _ a letter _ he _ _ a phone call.(while he _ _ a phone call, i _ _ a letter.)当强调某个动作发生时，另一个动作正在进行，用“一般过去时+while+过去进行时” e.g. 我们正在读书的时候，老师走了进来。the teacher _ in _ we _ _. 我妈妈在睡觉的时候，电话铃响了。while my mother _ _, the telephone _.while的使用特点也可以记忆为：while 后面不接一般过去时(即短暂性动词)。2. when和as使用范围比while 广泛，它们引导的从句中的谓语动词既可以是延续性的，也可以是短暂性的。换言之，能使用while的句子也可以使用when或as替代，如“一般过去时+while/when/as+as可理解为“随着.”随着日子变短，温度开始下降。_ the days are shorter, the _ starts to drop.随着时间推移，中国日渐富强。_ time goes by, china is getting richer and stronger.for more examples, please read the information on p123-124.课堂检测：一、选择：（ ）1. i _ a meal when you _ me. a. cooked, were ringing b. was cooking, rang c. was cooking, were ringing d. cooked, rang（ ）2.while she _ tv, she _ a sound outside the room.a. was watching, was hearing b. watched, was hearingc. watched, heard d. was watching, heard（ ）3.they _ a football game from 7 to 9 last night. were watching . watch . watched . are watching（ ）4. 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（ ）5. it was friday evening. mr and mrs. green _ ready to fly to england.a. are getting b. get c. were getting d. got（ ）6.a girl _ my pen fall off the table when she _ me.a saw, passed b. was seeing, passed c. was seeing, passed d. was seeing, was passing（ ）7.while mother _ some washing, i _ a kite for kate. a did, made b. was doing, made c. was doing, was making d. did, was making（ ）8. he _ some cooking at that time, so he_ me. a. did, heard b. did, didnt hear c. was doing, heard d. was doing, didnt hear.（ ）9. at this time yesterday jack _ his bike. he _ tv. a. repaired, didnt watch b. was repairing, watched c. repaired, watched d. was repairing, wasnt watching （ ）10. yesterday evening, i was playing the piano _ the doorbell rang. a. when b.before c. while d. after二、用单词的正确形式填空：1. while he _(knock) at the door, my aunt _ (cook).2.the students _ (sing) and _ (dance) happily on the playground at that time.3._ they_ (feed) the animals at 5:00 yesterday afternoon?4. mrs. green _ (not wash) clothes at this time yesterday.5. grandpa _ (mend) his clock when i _(reach) home.6. as i _ (walk) in the park, i _(see) some children playing games.7. jane _(wait) for me when i _(arrive).8. _ he _(lie) on the ground at nine yesterday evening ?9. what _ jim _(write) when the teacher _(come) in ?10. my brother _(fall) off and _(hurt) himself while he _(ride) his bicycle.作业布置：一、根据汉语提示完成句子：1、他们那时不在打排球。they _ _ volleyball at that time.2 当你回来时，他在看电视吗？_ he _ tv when you came back?3 昨天中午他在哪里等你？_ _ he _ for you at noon yesterday ?4 当我离开时，他正在做家庭作业。he _ _ his homework _ i left.5. 正当他们扫地的时候，老师进来了。 while they_ _ the floor , the teacher came in.二、 用所给单词的适当形式填空：1. when i _(go) into the classroom, the teacher _(show) some pictures to the students.2. millie _(see) you at the bus stop, _ you _(wait) for a bus?3. some fans _(shout) while others _(sing) with the pop star at that moment.4. its colder today than it was yesterday. the weather is getting _(bad)5. the radio says it is _(sun) this morning, but look at the _(cloud), it_(rain). 三、首字母填空1. i lost my schoolbag in the rainstorm. i looked for it e_ but couldnt find it.2. its not safe to go there at night, so i have to start off in the d_.3. i