人教版 (2019)必修 第一册Unit 4 Natural disasters导学案

这是一份人教版 (2019)必修 第一册Unit 4 Natural disasters导学案，共2页。学案主要包含了学习目标，学习重难点，学习过程，达标检测等内容，欢迎下载使用。
Unit 4 Natural disastersLesson 5 Reading for Writing【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+过去进行时”、“过去进行时+while/when/as+过去进行时”都可以。When 引导的从句含有突然发生的意思：我在街上散步，他突然喊我。I _________ _________in the street when he called me.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.【达标检测】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．It’s 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 couldn’t find it.2．It’s not safe to go there at night, so I have to start off in the d_________.3．It’s wrong to spend too much money on the coat. I don’t know how her m________ works.4．Could you wait a m__________, please? I am coming to you.5．There was a big fire in the school. Many students s__________ for help.