由 if 和unless 引导的条件状语从句教案资料
由if 和unless 引导的条件状语从句
1. If we lose our short-term memory, we forget things happening recently.
译：______________________________________________________
2. If the picture is silly, strange and colorful, you will remember it better.
译：______________________________________________________
A: If sentences: actions with definite results. 有必然结果发生的行动eg: ①If you go into a clothes shop, you find clothes.
②If you go into a car showroom, you see cars.
③Water turns into ice if you cool it.
④The wood floats if you put it into water.
Conclusion:
1). 如果if 条件句谈论的是重复发生和预示必定要发生的情景和事件，则主从句大多用一般现在时态。
2). 在if 条件句中，if 条件从句可以放在前面，也可以放在后面。当if 引导的条件从句放在前面时，后面常用逗号隔开。
B: If sentences: actions with possible results. 有可能性结果发生的行动eg: If you ask him，he will help you．如果你请他帮忙，他会帮你的。
If you fail in the exam，you will let him down．
在if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。
C: unless引导的条件状语从句：unless= if…… not. conj. 除非, 若不, 除非…（否则）
e.g.: Let's go out for a walk unless you are too tired.
= If you are not too tied, let's go out for a walk. 我们出去散步吧，除非是你太累。译：如果你不早点出发,你就不能及时赶到那儿。
我们可以把unless或if…not 从句放在句子开头或末尾。
You will be late for school unless you leave now. =
Unless you leave now, you will be late for school.
除非你早点出发，（否则）你上学会迟到。
You will be late for school if you don’t leave now. =
If you don’t leave now, you will be late for school. 如果你不早点出发，你上学迟到。
“if ” 引导的条件状语从句的用法,现在总结一下:
1)引导条件状语从句最常用的连词是if。if 引导的条件句有真实条件句和非真实条件句两种（非真实条件句会在以后的虚拟语气中阐述），其引导的真实条件状语从句表示在某种条件下某事很可能发生。
2）if 条件句不一般,几个要点记心间; 条件句,放在前,逗号要放句中间。
条件句表可能，主句多用将来时；条件句表事实，主句常用现在时。
【巩固练习】
一．if和unless句型互改。
Eg: You will fail the exam if you don’t work hard.
= You will fail the exam unless you work hard.
1）Unless you obey the rules, you will be punished.
=________________________________________________.
2) A fish dies if you don’t keep it in the water.
=________________________________________________
3) No body can learn English well if he doesn’t work hard on it.
=________________________________________________.
4) Unless you start right now, you will be late for the meeting.
=________________________________________________.
二．用if 或unless 填空。
1. you put wood into water, it floats.
2. I sleep with the window open it is really cold.
3. You will not improve your skill in a short time __ you practice playing the violin regularly.
4. Ice melts you heat it.
5. you boil water, it becomes steam （蒸汽）.
6. you don’t work hard, you will fail the exam.
7. He can’t be here on time he gets up early.
8. you don’t have enough sleep, you will feel tired.
9. it is fine tomorrow, I will go fishing with my dad.
10. you finish your homework, you will not go out to play.
三．单项选择。
1. You will not remember the facts you understand them well.
A. if
B. unless
C. if not
D. because
2. Shenzhen a dirty place if we the ground.
A. is; litter
B. will be; will litter
C. is; are littering
D. will be; litter
3. If you harder, you will fail the exam.
A. not work
B. work
C. don’t work
D. won’t work
4. you obey the rules, you will be punished.
A. If
B. Since
C. Because
D. Unless
5. He can’t see the words o n the board unless he his glasses.
A. wear
B. wears
C. doesn’t wear
D. to wear
6. If you plant seeds in soil, .
A. it grows
B. they grow
C. you grow
D. it will grow
7. If you check your timetable every night, it __ in your mind better.
A. will stay
B. stay
C. stayed
D. staying
8. A tourist will easily lose his way in Beijing ______ he has a map or guide.
A. if B, because C. unless D. when
9. I shall telephone the police and complain about it _ _ the noise .
A. if, stops
B. unless, stops
C. if not, stops
D. unless, stop
10. I sleep with the window open it’s really cold.
A. if
B. if not
C. unless
D. until
11. ______ you try, you will never succeed.
A. If
B. Until
C. Since
D. Unless
12. ______ he doesn’t come on time, we will go without him.
A. If
B. Unless
C. When
D. Because
13. I will come to see you if it ______ rain tomorrow morning.
A. won’t
B. didn’t
C. doesn’t
D. don’t
14. If you take a fish out of the water, it ______.
A. die
B. dies
C. will die
D. has died
15. ---Shall Tony come and play computer games?
---No, _____ he has finished his homework.
A. when
B. if
C. unless
D. once
if引导的条件状语从句讲义及答案
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高中英语必修二状语从句教案
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if引导的条件状语从句讲解和练习(答案)
t 条件状语从句 一、 条件状语从句通常由 if （如果）, unless （除非），as long as （只要）引导。 例如：If it rains tomorrow, we won ’go to the park. 如果明天下雨，我们就不去公园了。 Unless weather stops me, I go for a walk every. 我每天都会去散步，除非遇上坏天气。 Our parents will be pleased with our performance as long as we try our best. 小试牛刀：1、只要我们竭尽全力，父母就会满意我们的表现。 Our parents will be pleased with our performance _____ _____ ______ we try our best. 2、如果人人为保护环境做出贡献，世界将会变得更美好。______ ______ ______ _____ _______ to protecting the environment, the world will become much more beautiful. 二、if 引导的条件状语从句 （1）“if 从句+祈使句”的句子。其实，if 作为一个连词，主句也可以是其他形式的句子。 例如：If you want to go, please let me know. If the green light isn ’t on, wait for a minute. (2)“祈使句 + and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。 注意：A. “祈使句 + and + 陈述句”可以转化为 if 引导的肯定条件状语从句，而且主语是第二人称。 B. “祈使句 + or + 陈述句”可以转化为 if 引导的否定条件状语从句，而且主语是第二人称。 例如：Study hard and you will pass the exam. =If you study hard, you will pass the exam. Hurry up, or you ’ll be late. =If you don ’t hurry up, you ’ll be late. 考题 (2010 重庆中考)Work hard ，________ you may catch up with your classmates soon. A.or B.but C.and D.yet 思路解析：本句是“祈使句＋and”的句型，句意为“努力学习，你会很快赶上其他同学的”，and 在句中表示承接 关系，所以选 C 项。答案：C 黑色陷阱：本题的陷阱是句型，本句型区别于“祈使句＋or”，这个句型的含义是“……，不然的话/否则……”。 绿色通道：祈使句后面既可以加 and ，也可以加 or ，所以要全面分析句意，再作决定。 小试牛刀：用 if 连接下列句子 1、Go to bed early and you will have a good rest. 2、Hurry up, or you ’ll miss the bus. 三、if 从句与主句具有以下特点： 1．If 从句中用一般现在时，表示未来的一种条件，从句中可以加时间状语。 e.g.If yo u can’t come tomorrow, we can hold the party a little later.明天你如果不能来，我们可迟一点举行宴会。
状语从句教案
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if引导的条件状语从句
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教学设计IF引导的条件状语从句
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初中英语If引导的条件状语从句演示教学
初中英语――if引导的条件状语从句 在if 引导的条件状语从句中，if 和条件句位置灵活，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。还要注意前后时态一致原则.引导条件状语从句的连接词主要有：if(如果）、unless（除非）或as long as （只要）等。unless在意思上等于if...not。 一、条件状语从句用法 1、引导条件状语从句最常用的连词是if,由if引导的条件状语从句表示在某种条件下某事很可能发生。如： If you ask him, he will help you. 如果你请他帮忙,他会帮你的。 If you fail in the exam, you will let him down. 如果你考试不及格,你会让他失望的。 另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。如: If I were you, I would invite him to the party. 如果我是你,我会邀请他参加聚会。 2、unless = if...not.除非,若不,除非在……的时候 例如：Let's go out for a walk unless you are too tired. =If you are not too tired, let's go out for a walk. Unless it rains, the game will be played. 除非下雨,比赛将照常进行。 二、时态问题 在条件状语从句中，要注意“主将从现”的规定，即主句用一般将来时，从句用一般现在时表示将来时。例句： I will come to see you if I have time. 我有时间，我就来看你。 三如果if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。如： If bears are in danger ,they attack people. 误区提醒 if 既可以引导条件状语从句，表示“如果”，也可以引导宾语从句，表达“是否”。辨别它在这两种从句中的时态是我们经常容易出错的地方。另外，if 和unless的用法也需注意。 典型例题：----I wonder if your wife to the party. ----If your wife _________, so will mine。. A. will go，go B. will go, goes C.goes, will go D. will go, will go 解析：第一句中if表示“是否”，引导宾语从句，用将来时will go；第二句“如果你的妻子去，我的妻子也去”，if引导条件状语从句，用一般现在时表示将来时。your wife，单三人称主语，所以用goes 。
初中英语——If引导的条件状语从句
初中英语――if引导的条件状语从句 在主从复合句中修饰主句中的动词、形容词、副词等的从句叫做状语从句，状语从句一般可分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、结果状语从句、条件状语从句、让步状语从句、比较状语从句和方式状语从句九种。 在句子中做条件状语的从句称为条件状语从句。可置于句首、句尾，有时还可置于主语和谓语之间。引导条件状语从句的连接词有：if ,unless,as/so long as等 1.if引导的条件状语从句 表示在某种条件下某事很可能发生。 If we pay much attention to the earth, we'll have a better world. 如果我们多关爱地球，就会拥有一个更美好的世界 If it rains tomorrow, what shall we do? 如果明天下雨，我们怎么办？ 注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。 What would happen if there were no water ? 如果没有水会怎样？ 2.unless引导的条件状语从句 unless的意思是如果不，除非。可与if...not互换。 You will fail in English unless you work hard. 你英语考试会不及格的，除非你更加努力。 3.as /so long as引导的条件状语从句 as /so long as意思是“只要” So long as you're happy,i will be happy. 只要你高兴，我就高兴。 4.once引导的条件状语从句 once引导的条件状语从句，意为“一旦...，就”，从句可置于主句前或后 Once you begin,never stop. 一旦开始，就绝不要停止 Maths is easy to learn once you understand the rules. 一旦你理解了规则，数学就不难学了。 提示：在条件状语从句中，用一般现在时代替一般将来时，用一般过去时代替过去将来时。 If the weather is bad next week, we'll put off the climbing. 如果下周天气不好，我们将推迟爬山。 Father told me if i worked hard he would buy me a gift. 爸爸告诉我，如果我努力学习，他会给我买一份礼物。
《if 引导的条件状语从句》教案
英语教学设计 课题类型：复习课 内容: The usage of “if” Review the usage of “if” I. Teaching aims and demands i. Knowledge objects:
1. Review the usage of “ if ”in adverbial clauses of condition 2. Review the usage of “if” in subjunctive mood 3. Review the usage of “if” in objective clauses ii. Ability object: Train students’ speaking ability iii. Moral object: Make students know more about helping the people in trouble II. Teaching key points 1. How to tell the differences among the three situations 2. How to do exercises more correctly according to what we reviewed III. Teaching difficult points 1. Tell the differences between the usage of “if” i n adverbial clauses of condition and in subjunctive mood 2. How to use “if” in these three different situations IV. Teaching methods 1. Sentence chains activity to help 2. Competition 3. Talk about the pictures V. Teaching aids some colorful cards, The blackboard , A projector VI. Teaching procedures StepI.lead in and review the usage of “if” in adverbial clauses of condition. Listen to a song----“If you’re happy”. Students listen to it a nd summarize the usage of “if” in adverbial clauses of condition. eg, 1. If it rains tomorrow, I won’t go shopping.
状语从句教学案
英语高考专题复习讲与练13 状语从句 一、考点聚焦 1、时间状语从句 （2）引导时间状语从句的连接词除上述外还有： ①till, not … until …, until, before, since Don’t get off the bus unt il it has stopped. He waited for his father until(till)it was twelve o’clock. before 的有关句型 It will be +段时间+before+从句（一般现在时）“要过…..才” It will be five years before he returns from England. It won’t be long before +从句（一般现在时）“不久…就会” It won’t be long before he recovers from the injury. It was 3 years before he regained the love from his parents. It wasn’t long before the whole nation rose up to drive the enemy out of their country. He rang off before I could answer it. ②hardly / scarcely … when, no sooner … th an, as soon as once表示“一……就” As soon as I have finished it , I’ll give yu a call. Once you show any fear, he will attack you. We had hardly got / Hardly had we got into the country when it began to rain. No sooner had he arrived / He had no sooner arrived than she started complaining. ③directly, immediately, the moment, the minute that… 一……就 He made for the door directly he heard the knock. ④each time, every time, next time, any time ,by the time Each time he came to my city, he would call on me. ⑤the day, the time, the first(second, third …)time, the spring (summer, autumn, winter)
状语从句——条件状语从句 教案
一、复习预习 状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。 二、知识讲解 知识点： 【考查点1】 引导条件状语从句最常用的连词是if，常见的if条件状语从句表示在某条件下，某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。如： If you ask him，he will help you．如果你请他帮忙，他会帮你的。 If you fail in the exam，you will let him down．如果你考试不及格，你会让他失望的。 If you have finished the homework，you can go home．如果你作业做完了就可以回家了。 另外，if从句还表示不可实现的条件或根本不可能存在的条件，也就是一种虚拟的条件或假设。从句多用一般过去时或过去完成时，表示对现在或过去的一种假设。如：
If I were you，I would invite him to the party．如果我是你，我会邀请他参加聚会。 I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞，我本会来得早一些。 【考查点2】 另外要注意if 条件句的时态搭配 1．if从句用一般现在时，主句用一般将来时 If he runs he’ll get there in time. 如果他用跑的，他就会及时赶到那儿。 The cat will scratch you if you pull her tail. 如果你拉猫的尾巴，它就会抓你。 2．if从句用一般现在时，主句用may/might/can If the fog gets thicker the plane may/might be diverted. 如果雾在大一些，飞机可能就会改在别的机场降落。 If it stops snowing we can go out. 如果雪停了，我们就可以出去。 3．if从句用一般现在时，主句用must/should If you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。 4．if从句用一般现在时，主句用一般现在时 If you heat ice it turns to water. (也可用will turn)如果把冰加热，它就会化成水。 5．if从句用现在进行时，主句用一般将来时 If you are looking for Peter you’ll find him upstairs. 如果你是在找彼得，上楼就会找到他。 6．if从句用现在完成时，主句用一般将来时
If引导条件状语从句的详细用法解答
If引导条件状语从句的详细用法解答 引导条件状语从句最常用的连词是if，常见的if条件状语从句表示在某条件下，某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。如： If you ask him，he will help you．如果你请他帮忙，他会帮你的。 If you fail in the exam，you will let him down．如果你考试不及格，你会让他失望的。 If you have finished the homework，you can go home．如果你作业做完了就可以回家了。 另外，if从句还表示不可实现的条件或根本不可能存在的条件，也就是一种虚拟的条件或假设。从句多用一般过去时或过去完成时，表示对现在或过去的一种假设。如： If I were you，I would invite him to the party．如果我是你，我会邀请他参加聚会。 I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞，我本会来得早一些。 另外你还要注意if 条件句的时态搭配 1．if从句用一般现在时，主句用一般将来时 If he runs he’ll get there in time. 如果他用跑的，他就会及时赶到那儿。 The cat will scratch you if you pull her tail. 如果你拉猫的尾巴，它就会抓你。2．if从句用一般现在时，主句用may/might/can If the fog gets thicker the plane may/might be diverted. 如果雾在大一些，飞机可能就会改在别的机场降落。 If it stops snowing we can go out. 如果雪停了，我们就可以出去。 3．if从句用一般现在时，主句用must/should If you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。 4．if从句用一般现在时，主句用一般现在时 If you heat ice it turns to water. (也可用will turn)如果把冰加热，它就会化成水。5．if从句用现在进行时，主句用一般将来时 If you are looking for Peter you’ll find him upstairs. 如果你是在找彼得，上楼就会找到他。 6．if从句用现在完成时，主句用一般将来时 If you have finished dinner I’ll ask the waiter for the bill. 如果你吃完了，我就叫服务生来算账 注意： 学习" if " 引导的条件状语从句的用法,现在总结一下: if 条件句不一般,几个要点记心间; 条件句,放在前,逗号要放句中间。 条件句表可能，主句多用将来时； 条件句表事实，主句常用现在时。
if引导的条件状语从句教案资料
语法10单元语法再现梁老师组稿2017-12-31 一、观察下面的句子 If you go to the party, you will have a great time. If you do , you will be late. If you do,you will be sorry. If they have it today, half the class won’t come. If we ask people to bring food, they will just bring potato chips and chocolate. 以上几个句子中“if”有相同的含义“如果”，引导条件状语从句逗号后面的句子是主句。整个连起来的大句子叫主从复合句。 注意主句和从句的时态有什么特点。 总结：If引导的条件状语从句用一般现在时，主句用一般将来时。 简称“主将从现” 练习：（1）If you ______(come)here, you ___________(be) happy. (2) If it _________(rain) tomorrow, we__________(not, go) to the park. (3) If he _________(come) here, I ___________(call) you. (4) If it ___________(not rain), we _________(have) a picnic(野餐). (5) If we do that, more people _________(want) to play the games. (6) If they _______ that , the games _______(be) more exciting, too. (7)What ______ happen if they_______ (have) the party today? (8) What ______ happen if they _______ a video at the party? (9) If he ______(take) a taxi, it _______(be) too expensive. (10) If I _______(go) to the movies, I ____________(finish) my homework. 条件状语从句的引导词还有“unless 除非（否则），如果不”
状语从句教案58877
The Adverbial Clauses 抚宁一中王艳 I. Teaching topic：The Adverbial Clauses II. Teaching type：Grammar III. Teaching Objectives: 1 In knowledge： Enhance students’ proficiency and accuracy in using the adverbial clauses. 2 In ability: Facilitate students’autonomy and cooperative learning abilities. 3 In emotion: Stimulate students’ interest and cultivate their confidence in learning English grammar. IV. Teaching important points： Get students to know the usage of the adverbial clauses and the differences among the conjunctions. V. Teaching difficult points: Help students develop good learning habits and abilities. VI. Teaching Methods: 1. Communicative teaching method 2. Discussion and role-play method 3. The deductive method and the inductive method VII. Teaching Aids: A blackboard，chalk and multimedia Step IV. Teaching procedures (教学步骤): Step I：Lead in (8 minutes) The teacher shows the dialogue to the students and asks students to find out the clauses, that is, the adverbial clauses. Then ask the students to brainstorm the kinds of the Adverbial Clauses. Purpose: to draw students’attention by showing the interesting dialogue between the two familiar characters. Step II：Revise the Adverbial Clauses one by one. The teacher divides the students into two groups ----- boys and girls. Then ask the students to choose one kind of the clauses and answer questions to get points. 1. Adverbial Clauses of Time (时间状语从句) 1）Ask students to do multiple-choice to know the difference among “when”, “while” and “as”. 2) Ask students to think about other conjunctions and write sentences by themselves. Then ask students to correct mistakes by themselves and explain the important and difficult points. 3) Ask students to translate three sentences to know different meanings of “before” 2. Adverbial Clauses of Concession(让步状语从句) 1）Ask students to fill in the blanks according to the picture. 2) Ask students to do multiple-choice to acquire the important points. Clauses of Manner(方式状语从句) 1）Ask students to fill in the blanks according to the pictures. 2）as if/though … (either the Indicative Mood or the Subjunctive Mood) 4．Adverbial Clauses of Place（地点状语从句） Ask students to do multiple-choice to know the usage of “where”and “wherever”----- the