【精编版】中考英语复习课件：if 条件状语从句

1、if 条件状语从句中考点击考点揭密 历年中考英语试卷都有对状语从句的考查。命题热点主要集中在以下几个方面：时间，条件，结果，让步，原因，目的状语。考点设置条件状语从句(1)引导词：if,unless.(2)主句为将来时，从句用一般现在时代替。(3)if.not与unless及or的同义句转换。 What will I do if it is sunny this weekend?sleepplay computer gamesgo shopping?什么是状语？什么是从句？表示时间、地点、原因、目的We sleep at night at home.必须符合“从句的三个必须”必须是句子；必须有

2、连接词；必须是陈述句 什么是状语从句？用一个句子充当状语成分，那个句子就是状语从句。I get upat sixwhen it is dark.I get upat schoolwhere I study.定义状语从句状语从句同副词，介词词组等作状语一样，用于修饰谓语，说明谓语动作的时间，地点，方式，手段，条件，程度，比较，原因，目的，结果等 1. I get up at 6:00 2.It is dark 3. I get up when it is dark状语从句分类表示时间 表示地点 表示原因 表示结果 表示目的表示条件表示让步表示比较返回最常用的引导词有: if， if only（i

3、f 的强调式）,unless (= if not)，除非 as soon as 条件状语从句E.G.I will call you as soon as I arrive at BeijingYou cant learn it well unless you work hard.If you want to know ,I can tell you.If 引导条件状语从句 用法：1. 如果主句是一般将来时，从句则用一般现在时。 2.如果主句含有must, may, can 等情态动词，从句也要用一般现在时。 3. 如果主句是祈使句，从句同样要用一般现在时。 If it rains， I wil

4、l stay at home. Ill go with you if you dont want to go alone. If you drive too fast, you may have an accident. You must stop if the traffic is red.Dont go and play football if you dont finish your homework.Please call me if he comes next Sunday.If引导条件状语从句，遵循：主将从现主祈从现主情从现If it is sunny this weekend,

5、what will you do ?If it is sunny this weekend, I _ football with my classmates.If it is sunny this weekend, I_. will play will play computer games.If it is sunny this weekend, what wont you do ?If it is sunny this weekend, I _.If it is sunny this weekend, I _.wont stay at home wont watch television

6、Part1:If 的用法 1.I want to know if he will go to park with us.2. We will have a picnic if it doesnt rain.3. If you boil water, it becomes steam. 4. If you feel tired, you must have a rest.宾语从句条件状语从句易错点1. Can you tell me if she can come to the meeting ?2. She will not go there , if it is rainy tomorrow

7、.3. I cant guess if she will be angry .4. If we help each other , we both will get good results .If 在宾语从句中翻译为“是否”If 在条件状语从句中翻译为“如果”Ill go to see you if I am free next week. I want to know if he is a teacher.whether1. if 在句中的含义不同If引导的从句宾语从句与条件状语从句的区别？2. if 在从句中的位置不同If 引导的宾语从句放在主句之后；而if引导的状语从句可放在主句之前也

8、可放在主句之后= If it doesnt rain, I will go out tomorrow.I will go out tomorrow if it doesnt rain.I dont know if the train has arrived. If 引导的条件状语从句放于句首时多用逗号隔开； 而if引导的宾语从句则不能。3. 时态要求上有区别If 引导条件状语从句的时态为一般现在时 记住“主将从现” 1.I want to know if there a sports meeting next month.doesnt rainwill be2.If it , well hol

9、d it.If 引导的宾语从句的时态由主句及本身时态决定；易错点If引导的从句什么时候是宾语从句，什么时候是条件状语从句？【判断方法】1.if如果跟在动词后面即为宾语从句；如果跟在句子后面即为状语从句状语从句如果放在前面通常用“，”隔开。2.if如果翻译为“如果”则为条件状语从句； if 如果翻译为“是否”则为宾语从句由从属连词whether, if 引导的宾语从句e.g. 1. I want to know _. （他是否跟我们一起去公园）2. Ask him _. （他是否能来）3. I didnt know _.（是否要下雨） if (whether) he will go to the

10、 park with us whether (if) he can come whether it was going to rain or notif引导的宾语从句，根据需要选择相应的时态由从属连词if 引导的条件状语从句由if引导的条件状语从句，if意为“如果”若主句是一般将来时，从句要用一般现在时。1）He will go to the Great Wall if it _tomorrow. A. wont rain B. doesnt rain C. dont rain D. isnt raining 2）_ you eat remains of a meal, you may be

11、ill. A. Before B. Why C. If D. Which10.The students _ have a sports meeting this weekend if it _。A. wont; rains B. will; rains C. wont; will rainD. are going to; is going to rain12.If she here tomorrow, I will tell you.A. comes B. will comeC. come D. came14. Tom wants to know if you will have a picnic tomorrow. Yes. But if it _, well play chess instead.A. will