资源简介

教 学 内 容 9A Unit 6 Grammar
教 学 目 标 1. 掌握并能正确使用由if, unless引导的条件状语从句 2.重点词汇、短语
重 点 1. 掌握并能正确使用由if, unless引导的条件状语从句 2.重点词汇、短语
难 点 如何掌握并能熟练使用引导条件状语从句的连词; if&unless
教 学 准 备 知识点、巩固练习、课堂练习、课后作业
教学过程
Step 1 if/unless引导条件状语从句 一、if引导条件状语从句 条件状语从句表示主句动作发生的条件,在初中阶段常由if(如果)引导,表示“假如有从句的动作发生就会有主句的动作发生". e.g. Please call me if he is at home. 假如他在家的话,请给我打电话。 【考查1】重点时态 如果主句是一般将来时,从句一般用一股现在时。 e.g. I won't go there with you if it rains tomorrow. 如果明天下雨的话,我就不和你一起去那儿了. 【测一测】If you tomorrow, I will let you know all about it. A. will come B. come C. came D. comes 【考查2】主从句的位置 从句可以位于主句之前,也可以位于主句之后。不过从句在前时,主从句之间须用逗号隔开。 e.g. Please tell me if he comes back. =If he comes back, please tell me.如果他回来了,请告诉我一声, 【考查3】[易错点]的两面性 if引导条件状语从句时意为“如果”,如果引导宾语从句则意为“是否",请比较: (1) We will go out if it is fine tomorrow. (2) I don't know if the train has arrived. 句(1)中if引导的是状语从句。这个从句表示“条件", 整个句子的意思是“如果明天天气好,我们就出去。 句(2)中if引导的是宾语从句,充当谓语动词 know的宾语,整个句子的意思是“我不知道火车是否到了." 【测一测】-I don't know if his uncle -I think he if he is free. A. will come; comes B. will come; will C. comes; comes D. comes; will 【拓展】条件状语从句和主句还有一个共同的伙伴,有时它可以替代从句和主句,它就是“祈使句+and/or+简单句",其中and表示句意顺承;or则表示转折,意为“否则"。 e.g. If you work harder, you'll pass the exam.=Work harder, and you'll pass the exam.如果你再努力些,你就会通过考试。 【测一测】Hurry up, or you'll miss the train.(改为同义句) you , you'll miss the train. 二、unless引导条件状语从句 unless 引导条件状语从句,相当于f引导的条件状语从句的否定形式,即unless=if...not。中文意为“如果不.;除非"。 1 含unless 或if引导的条件状语从句的复合句中,主句用一般将来时,从句用一般现在时代替一般将来时。即所谓的“主将从现"。 【测一测】I won't go to Julie's birthday party unless I . A.am invited B.was invited C. will be invited D. would be invited 2 “祈使句(肯定式)+or+陈述句"与“unless 条件句+主句"有时可以相互转换。 e.g. Put on your raincoat, or you'll get wet. =Unless you put on your raincoat, you'll get wet. = If you don’t put on your raincoat, you’ll get wet. 【测一测】You can’t use my computer unless you get my permission.(改成同义句) You can’t use my computer you get my permission. Step 2 Language points 1 attack vt & vi 攻击，进攻 attack 主要用作及物动词，较少用作不及物动词。其主语多为人、动物或疾病等，宾语为被攻击的对象，既可以为人，也可以为物。 e.g. If you are not careful, a tiger will attack you. 如果你不小心，老虎会攻击你。 【测一测】The man was and robbed by a gang(一群，一伙) of youths. A protected B attacked C saved D helped 2 What will a bear do if it's in danger (P. 85) be in danger意为“处于危险之中”。 He is in danger now. Let's hurry to save him. 3 However, she tore the tips by accident. (P. 86) by accident意为“偶然、意外地”。 by chance 偶然，碰巧 on purpose[ p :p s] 故意，有意 例如：He found the hole by accident. I hurt myself by accident. 4 Unless you take your own food with you. (P. 86) take sth. with sb. 意为“某人随身携带某物”。 You had better take some money and clothes with you when you go on vacation 【辨析】take, bring, carry, fetch take指从这里拿走，即把某人或物从说话人处带到别处，包含了away的含义。e.g. Could you help me to take the box to the classroom bring指从别处拿到这里来，或拿到说话人所在的地方。 Bring me a cup of tea, please.carry表示携带，运载等，具有负重含义，不表示固定方向。 Let me carry this bag for you.fetch“去拿来”，是去某处将某物拿回来或将某人接回来。She has gone to fetch the kids from school.
【测一测】 1 A strong wind will arrive in Harbin. It will much rain here. A bring B take C catch D fetch 2 Don’t forget to your schoolbag with you when you go there this evening. A take B bring C gets D holds 随堂练习 一 用所给词的适当形式填空 1.Where he (see)the film if he (have)time 2.If there (be)fewer trees, there (be)more pollution. 3.If you (feel)tired, you (have)to have a rest. 4.If Maria (live)alone, she (keep)a pet parrot. 5.Lily (buy)a new dress if the old one (be)out of style. 6.You can't pass the exam unless you (try)to study hard. 7.If Mr Green (say)I am hard-working, my parents (feel)glad. 8.I (go)to the beach if it (not rain)this week. 9.He (write)a letter to his grandparents if he (get)his report card this week. 10.If she (get)up late, she (not catch)the early bus. 二 单项选择 11.-I think everyone should play a part in saving our environment. -I agree. For example, there will be less air pollution we drive less. A if B. so C. though 12.The nurse won't leave her patients she's sure they are all taken good care of. A. unless B. because C. since D. if 13.If you too much ice cream, you will feel sick. A. eats B. eat C.to eat D. eating 14.-The novel seems a little boring. -You won't enjoy it you put your heart into it. A. when B. if C. after D. unless 15.-The air pollution is terrible. -It will be worse we take action to protect the environment. A. if B. unless C. until D. when 16.I think that studying in pairs or groups is necessary you want to learn from each other in class. A. though B. until C. unless D. if 17.If we take environmental problems seriously, the earth worse and worse. A. don't; will be B. won't; isn't C. won't; is D. don't; won't be 18.-Can you guess if Mike swimming this afternoon -I think he will go with us if he free. A. will go; is B. will go; will be C. goes; is D. goes; will be 19.I don't know if Mike back tomorrow. If he back, please call me. A. will come; will come B. comes; will come C. will come; comes D. come; comes 20.-Claudia, are you going to Jeff's birthday party on Saturday -Unless I A. will be invited B.am invited C. was inviting D. invited 三根据汉语提示完成句子 21.吸烟会让他的病情加重,除非他立即戒烟。Smoking will make his illness worse 22.我不会去参加这个聚会,除非受到邀请。I won't go to the party 23.如果你努力学习,你就会取得好成绩。 If you , you good . 24.如果他看电视太多,他的父母会不高兴。 If he TV too much, his parents happy. 25.如果明天不下雨,我会和你一起去公园的。 If it tomorrow, I go to the park you. -1.will;see;has 2.are;will be 3.feel;will have 4.lives;will keep 5.will buy;is 6.try 7.says;will feel 8.will go;doesn't rain 9.will write;gets 10.gets;won't catch 二11.A 点拨:考查连词的辨析。 最后一句句意为:例如,如果我们少开车,空气污染就会更少。“如果”用if。 12.A 点拨:句意:这个护士不会离开她的病人,除非她确信他们都得到了很好的照顾。只有A符合题意。 13.B 点拨:考查条件状语从句的时态。 句意:如果你吃太多的冰激凌,你会觉得要吐。主句是一般将来时,条件状语从句要用一般现在时表示将来。故选B。 14.D 15.B 点拨:考查连词的用法。 句意为:一空气污染很严重。一一如果我们不采取措施保护环境,情况会更糟糕。if如果;unless 如果不.除非:Until 直到......为止:when当.....时。根据句意可知选 B. 16.D 点拨:考查连词的用法。 创意为:如果你们想在课堂王互相学习.我认为结对战结组学习是必要的,hog尽管:mil 到......为止:unless陈非;if如果,故选D., 17.A 点拨:创意为:如果我们不认真对待环境问题.地球将会变得越来越糟糕。 根据关键词重可知,应该遵循“主将从现”原则。结合句意可知选A. 18.A 点拨:考查f从句。 f的用法:1.(表示条件)如果,.主句用将米时,f从句用一般现在时表示将来。2.是否=whether,引导宾语从句.根据实际情况选用恰当的时态。第一句f意为“是否”:你能猜出今天下午 Mike是否会去游泳吗 根据this afternoon 且结合句意可知从句用一般将来时。第二句f意为“如果”:如果他有空,他会和我们一起去。主句用一般将来时,从句用一般现在时。故选A. 19.C 点拨:考查时态。第一句中的f引导的是宾语从句,根据时间状语 tomorrow 可知用一般将米时。后句中f引导的是条件状语从句,主句用祈使句或将来时,从句用一般现在时代替一般将来时。故选C. 20.B 点拨:考查时态和语态。连词 unless 意思是“除非",引导条件状语从句,从句用一般现在时表示将来,根据句意:-Claudia,在周六你要去参加杰夫的生日派对吗 一一除非我被邀请(我才去)。确定用一般现在时的被动语态。故选B。 三,21.unless he gives up smoking at once 22.unless I am invited 23.study hard;will get;grades 24.watches;will not be 25.doesn't rain;will;with

展开更多......

收起↑