八年级英语下册Wordbank教案(新版)牛津上海版

Word bank原因状语从句教学目标：1.学习原因状语从句的用法2.掌握because, since, as, now that的区别3.for 引导的并列句与原因状语从句的辨析教学重点：1.学习原因状语从句的用法2.掌握because, since, as, now that的区别3.for 引导的并列句与原因状语从句的辨析教学难点：1.掌握because, since, as, now that的区别2.for 引导的并列句与原因状语从句的辨析一、课前预习：认真预习教材有关原因状语从句的知识点，系统了解原因状语从句的用法。

二、课堂活动：A、引导原因状语从句的连词原因状语从句一般由从属连词because, as, since，now that引导。

B、because, as, since和now that的区别：1、because“因为”，表示直接的原因，语气最强。

1）why提问的句子，必须用because回答。

2）because的从句常放在主句之后。

3）because 不能与so连用。

4）because+ 从句；because of+ 名词短语I missed the train because I got up late.He was angry not because we were late but because we made a noise.-Why didn’t he come yesterday? -Because he was ill.2、as“因为”，语气较弱，一般放在主句前，中间用逗号隔开，表示的是明显的原因。

As he was not well, I decided to go there without him.As it was raining hard, we had to be indoors.3、since/ now that“既然”，一般放在主句前，中间用逗号隔开，表示的是明显的原因或众所周知的事实。

Since/ Now that this method doesn’t work, let]s try another.Since/ Now that you feel ill, you'd better not go to work.C、for 引导的并列句与原因状语从句的辨析并列连词for“因为”，引导的不是从句，而是并列分句，只能放在主句之后，不能放在句首，常用逗号把它和前面的分句隔开。

对主句补充说明理由或推断原因。

It rained last night, for the ground is wet.She must have gone out early, for she had not come for breakfast.Exercise:一、填入恰当的连词1. I didn’t go to school yesterday _________ I was ill.2. ________ everybody is here, let’s begin our meeting.3. ________ you are in poor health, you should not stay up late.4. I asked her to stay to tea, ________ I had something to tell her.5. ________ all the passengers are here, why don’t we start at once?6. Bill won’t make any progress ________ he doesn’t study harder than before.7. He might have gone to bed, ________ the light went out.二、改写句子,保持句意不变1) The ship changed its course because there was a storm.The ship changed its course _______ _______ _______ _______.2) Because he was ill, he didn’t go to school.He was ill, _______ he didn’t go to school.3) He couldn't walk because his leg was broken.He couldn't walk ______ ______ his ______ leg.4) I came back because it was raining heavily.I came back ______ ______ the ______ rain.三、课堂小结：_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________四、回家作业：一、填入恰当的连词1. ______ you do not understand, I will explain again.2. ______ Jane was the oldest in this family, she had to look after the others.3. He must be ill, ______ he is absent today.4. The teacher must be strict with you ______they want you to make great progre ss.5. _____your father is well again, you no longer have anything to worry about.6. The day breaks, _____the birds are singing.7. ______ you are ill, you’d better go to see the doctor.8. ______ she was late for class, she had to say sorry.二、选择恰当的答案1. The man can’t get on the bus ______ there is no ro om on it.A. thoughB. becauseC. until D so that2. ______ her daughter hadn’t come back, ______ she looked worried.A. Because, /B. Because, soC. Though, butD. Though, /3._______ you’ve got a chance, you might make full use of it.A. Now thatB. AfterC. AlthoughD. As soon as4. He found it difficult to read, _______ his eyesight was beginning to fail.A. andB. forC. butD. or5. A man cannot smile like a child, ________ a child smiles with his eyes, while a man smiles with his lips alone.A. soB. butC. andD. for五、学生反馈：（在完成回家作业的过程中存在的问题）_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________六、教师反馈：（在批改学生回家作业中发现的问题）_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________Keys：A、引导原因状语从句的连词：because, as, since，now thatB、because, as, since和now that的区别：1、because：“因为”，表示直接的原因，语气最强。

1）why提问的句子，必须用because回答。

2）because的从句常放在主句之后。

3）because 不能与so连用。

4）because+ 从句；because of+ 名词短语2、as：“因为”，语气较弱，一般放在主句前，中间用逗号隔开，表示的是明显的原因。

3、since/now that：“既然”，一般放在主句前，中间用逗号隔开，表示的是明显的原因或众所周知的事实。