until状语从句市公开课一等奖省赛课微课金奖课件.pptx

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2021/10/3,#,till/until,引导时间状语从句,1.,必定句：,till/until,直到,表某动作一直连续到某时间才停顿,（主句谓语动词时延续性动词）,eg:I have to stay here until the rain stops.,I watched TV until my mother returned last night.,1/23,2.,否定句,notuntil,直到,才,(not,能够用表示否定意义词代替，比如,never,nothing,seldom,等,),表示某动作一直连续到某时间才开始,（主句谓语动词是非延续动词）,eg,：,He wont go to bed till/until she returns.,Tom knew nothing about it untill his I told him.,2/23,注意,1.till,不能够置于句首，,until,能够,eg:Until the class is over I read the book.,2.not until,在句子开头时要用倒装,Not until you told me did I know the truth.,3/23,2.I will not go out_I finish my homework.,A.until B.while C.since D.but,4/23,3.Ill wait_she comes out.,A.whether B.after,C.though D.until,5/23,if,和,unless,引导 条件状语句,6/23,真题,1.Tom knew nothing about it_ his sister told him.,since B.if C.until,(,湖南中考）,7/23,常考状语从句主要是，,1.when,while,as,until,not until,等,引导,时间状从,2.so,that,so,（,）,that,such,（,）,that,等引导,结果状从,3.if,，,unless,等引导,条件状从,8/23,由,if,引导条件状语从句,，,if,意为“,假如,”,表示在某条件下，某事就很可能发生。,。,If it stops snowing,，,we can go out.,假如雪停了，我们就能够出去。,If it snows tomorrow,we will build a snowman.,假如明天下雪，我们将去堆雪人。,9/23,If,引导条件状从,时态,1.,从句用普通现在时，主句是普通未来时,主将从现,If it is fine tomorrow,we will go on a ship.,假如明天天气好，我们就去旅行。,10/23,2.,用,if,条件句表示客观真理或普遍现象，主从句时态均用普通现在时,.,即,主现从现,例,.,If you freeze water,it turns into ice.,假如你冷冻水，它将变成冰。,A fish dies if you take it out of water.,假如你把鱼拿出水，它就会死掉。,11/23,注意：在,if,引导条件状语从句中，,if,条件句可直接放在主句后面，若,if,条件句放句首，从句后面要加逗号，和主句隔开。,If I get up late,I will be late for school.,=I will be late for school if I get up late.,假如我起床晚了，我就会迟到。,12/23,unless,引导条件状语从句,unless,是,if,得反义词，相当于,if not,表“假如不，除非”,.,If you dont work hard,you will fail.,=Unless you work hard,you will fail.,假如你不努力，你就会失败。,除非你努力，不然你就会失败。,13/23,真题回顾,We will have no water to drink,we dont protect the earth.,A.until B.before C.though D.if,(,上海,37),（假如我们不保护地球，我们将没有水喝。）,14/23,2.Bob promise to join in the football match,he has to help his parents on the farm.,A.if B.as C.unless D.when,(,安徽，,35,）,15/23,3,（,01,上海）,You will succeed in the end_ you give up halfway.,A even if B as though C as long as D unless,16/23,Thank you!,GOODBYE!,17/23,例句：,1.Unless it rains,I will go home on foot.,假如不下雨，我将走回家。,2.Dont touch the instruments unless the teacher allows you,假如没有老师允许，不要乱动仪器。,18/23,2.if,从句用普通现在时，主句用,may/might/can,If I finish my homework,I can play basketball.,假如我昨晚作业，我就能够打篮球了。,19/23,3.if,从句用普通现在时，主句用,must/should,If you want go to a good university,you must study hand.,假如你想上好大学，你必须努力学习。,20/23,The sports meeting wont be,2.Dont touch the instruments unless the teacher allows you,没有老师允许，不要乱动仪器。,21/23,If I have enough money,I will travel around the world.,22/23,I will go to a good university.,If I study hard,23/23,