八年级初二上册英语人教版新起点名师教学教案if引导的条件状语从句21.docx
教师姓名毕玉单位名称兵团二中填写时间2020年8月1日蝴英语年级/册八年级(上)教材版本人教版课题名称If you go to the party, you 'll have a great time!难点名称正确使用if引导的条件状语从句难点分析从知识角度分析为 什么难if引导的条件状语从句时态有三种情况:主将从现,主情从现,主祈从现,而擘生有时 会在判断主句和从句时出现错误,导致时态选择错误。从阜生角度分析为 什么难阜生在判断时态时会比拟难理解用一般现在时表达将来的事情,导致在看到表将 来的时间状语时,从句选择一般将来时。难点方法1 .情景教擘法2.PPT难点突出标识教阜环节教过程导入疫情期间,我们要做好防护工作,我们出门的时候一定要戴好口罩。We will not be allowed to go out if we don*t wear masks.用贴近生活的例子来导入重点知识。知识讲解 (难点突破)1 .含义:如果从句动作(不)发生,主句动作就(不)会发生。If it doesn't rain tomorrow, well go to the Great Wall.如果明天小卜雨,我们就去长城。此句中,If it doesn't rain tomorrow 为从句,well go to the Great Wall 为主句.从句和主句的位置关系:从句可以放在主句后,也可以放在主句前,从句放在主句前时,应用逗号将它与主 句隔开。也就是说:If it doesn't rain tomorrow, well go to the Great Wall.二Well go to the Great Wall if it doesn't rain tomorrow.2 .时态RULE 1:主将从现即主句用一般将来时,从句那么用一般现在时。If my mother is free, she will take me to the park.如果我妈妈有仝,她将会中我去公园。If he comes, he will tell me all.如果他来了,他将会告诉我全部。RULE 2:主情从现即主句用情态动词+动词原形,从句用一般现在时If you want to pass the exam, you should study hard.如果你想考试及格,你应该好好擘习。If you want to lose weight, you must eat less bread.如果你想减肥,你必须少吃点面包。RULE 3:主祈从现即主句用祈使句,从句用一般现在时If you see him, give him this notebook.如果你看到他,请把这个笔记本给他。Tell him Vm not at home if someone calls,如果有人打 过来请告诉他我不在家。1 .情景练习If I become rich, I my own company.如果我变得很有钱,我将会成立自己的公司。If I become rich, I spend money wisely.如果我变得很有钱,我应该明智地花钱。If I become rich,with me!如果我变得很有钱,来和我一起享受生活吧! 答案:will set up ; should ; come and enjoy life2 .基础巩固If he in half an hour, we wait for him.A. won't come , won'tB. won't come , don'tC. doesn't come , won'tD. will come , don't答案:C解析:此题考查条件状语从句主将从现的运用。题干的意思是如果他一小时后不来,我们将不会等他了, 从in half an hour,一小时后可知本句说的是未来的事,那么if引导的条件状语从句要用一般现在时表示将 来时,主句要用一般将来时。We must stop if the traffic light red.A. turn B. turns C. is turning D. turned 答案:B解析:句意:如果交通灯变成红灯,我们必须停。if引导的条件状语从句,主将从现。主语是第三人称单数, 动词用第三人称单数形式。应选B。课堂练习Do you know the saying, nIf you life, life you back?(难点巩固)A. love; loveB. love; will loveC. will love; loveD. will love, will love答案:B解析:句意:你知道这句谚语“如果你爱生活,生活也会厚爱你”吗?在含有If引导的条件状语从句的主从 复合句中,用符合“主将从现"原那么,即主语是一般将来时,从句是一般现在时。结合选项,应选BCheer up! If you want to go up high,your own legs.A. to useB. use C. usingD. used答案:B解析:句意:如果你想爬得高,就用你自己的腿。if引导的条件状语从句,主祈从现。应选B。3 .中考链接2020年郴州市中考一 I really want to go to college for further study.Believe in yourself. If you hard, your dream will come true.A. will study B. studied C. study 答案:C解析:句意:我真的很想上大阜深造。相信自己。如果你努力阜习,你的梦想就会实现。根据语法,在由if引导的条件状语从句中,如果主句的时态是一般将来时,那么从句要用一般现在时。故 选C。L if条件状语从句的定义:小结if意为“如果”,如果从句动作(不)发生,主句动作就(不)会发生。2. if条件状语从句的时态:主将从现,主情从现,主祈从现