教案课件是我们教师工作的一部分，教案课件里的内容是由教师自己改进的。详实的教学教案有助于教师记录学生的学习进度。您可能需要“高中if从句教案”，这是我们整理的，方便您以后阅读，请收藏本文！
高中if从句教案 篇1
主语状语置于主句尾，宾语从句之前。
主语谓语动词（包括非谓语动词）与宾语从句之间有插入语。
一个动词带有两个或两个以上宾语从句时，第一个that可以省略，第二个that不可以省略。
宾语从句中的主语是this,that或those,these做主语的定语。
宾语从句是双宾语中的直接宾语。
宾语从句的主语是非谓语动词或主语从句。
主语中的谓语动词是固定词组。
宾语从句有it做其先行词。
直接引语中，转述分句把宾语从句隔开。
主句的谓语动词是think,believe,imagine,suppose,consider,expect,fancy,guess等，并且主句的主语是第一人称而且为一般现在时，从句的否定词一般要转移到主句上来，其反义疑问句一般与宾语从句一致.
如果宾语从句中有某个含有否定意义的形容词或副词，其反义疑问句要用肯定形式.我们通常称为否定前移。
当主句为现在时或将来时,宾语从句的时态一般不受主句的时态所影响.
⑤当宾语从句的引导词是who,which,what,when,where,how,why等表疑问时，不能按正常语序安排，经常将这类引导词置于句首
无论任何时候都为陈述语序.但也有部分口语提问例外 E.G:What's the matter?What's wrong with you?
高中if从句教案 篇2
高中定语从句课件
在高中英语的学习中，定语从句是一个非常重要的知识点。它不仅在阅读理解和听力理解中经常出现，而且在写作中也是必不可少的。因此，学好定语从句对我们来说是非常有必要的。
什么是定语从句？
定语从句是指一个句子作为另一个句子的修饰语，用来对另一个句子中的某个名词或代词进行修饰，并对该名词或代词进行补充说明。定语从句通常由关系代词或关系副词引导，关系代词常见的有who, whom, which, that，关系副词常见的有when、where、why等。
如何使用定语从句？
在使用定语从句时，需要注意以下几点：
1.关系代词的选择
在选择关系代词时，需要根据其在定语从句中的功能进行选择。一般情况下，who指人，which指物，that既可以指人也可以指物。而whom通常只用来指人，并且在非正式场合下已经被who所取代。
2.关系词的位置
关系词在定语从句中通常出现在从句的开头或结尾，如果关系词出现在中间，则需要用关系副词来引导定语从句。
3.定语从句的位置
定语从句通常紧跟在被修饰的名词或代词之后，但是在从句过长或者句子复杂的情况下，也可以将定语从句放在句子的末尾，这种情况下需要使用逗号将定语从句与主句隔开。
定语从句的练习
学习定语从句最好的方法就是通过大量的练习来掌握。下面是一些定语从句的练习题，希望大家能够认真做题，掌握定语从句的使用方法。
1. The girl ______ I met yesterday was very friendly.
A. whom B. who C. which D. that
2. The teacher _______ we talked about is very strict.
A. who B. whom C. which D. that
3. The book ________ cover is red is mine.
A. who B. whom C. which D. that
4. The place ________ we stayed last night was very comfortable.
A. who B. whom C. which D. that
5. The reason _________ I’m late is that I missed the bus.
A. when B. where C. why D. whom
以上就是关于高中定语从句的一些简介，如果想更好地掌握定语从句，需要不断的练习，并且注意细节。希望大家能够在学习中取得好成绩。
高中if从句教案 篇3
高中英语宾语从句课件
宾语从句(object clauses)
1、概述用作宾语的从句叫做宾语从句。宾语从句的位置与陈述句基本结构中的宾语相同。宾语从句可作谓语动词的宾语，也可以作介词和非谓语动词（动词不定式、动名词、分词）和某些形容词的宾语。宾语从句可以由从属连词that whether、if，关系代词what, who, whose, which和关系副词when、where、how、why等引导。
He said he wanted to go to town.他说他想去城里。
I hope you'll be better soon.我希望你能很快好起来。
I’m so glad that you were able to come to this party.你能设法抽空出席这个交际会，我很高兴。
I know nothing about it except what I have read in the papers.除了在报上读到的以外,我对这件事一无所知。
Most of the Chinese people usually go to work on the bike except when it rains.除了雨天,大多数中国人一般都骑自行车上班。
He asked me whether she was coming.他问我，她来还是不来。
2、作动词宾语
（1）由从属连词that引导的宾语从句。that引导宾语从句时，只起引导词作用，在句中不做成分，在口语和非正式文体中常省去。
I think (that) he'll be right in a few days.我认为他几天后就会好的。
I wish（that）she would understand me.我希望她理解我。
（2）由关系代词what, who, whose, which引导的宾语从句，在句中作成分，即主语、宾语、表语和定语，关系代词在句中不能省略。
A computer can only do what you have instructed it to do．计算机只能按人的指令去做。
Do you know whom they are waiting for?你知道他们在等谁吗？
He asked whose dictionary it was.他问这是谁的字典。
He can't tell which method they will use for the experiment.他不能断定他们会用哪一种方法做实验。
（3）关系副词when，where，how，why等引导宾语从句。关系副词when，where，how，why既有疑问意义，又起连接作用，而且在宾语从句中充当各种状语，分别表时间、地点、方式、原因。在句中不能省略。
Please tell me when we shall discuss our plan.请告诉我我们将何时讨论计划。
I don't know where we are going to have the meeting.我不知道我们将在哪里开会。
Will you tell me how I can get to the station？你能告诉我如何能到车站吗？
Do you know why he said that?你知道他为什么说那件事吗？
I remember when this used to be a quiet village．我记得这里曾经是一个僻静的村庄。
（4）由从属连词whether或if引导的宾语从句。
I wonder whether (if) daughters are valued as much as sons in the countryside.我想知道在农村女儿是否和儿子一样受到重视。
I don't know whether (if) you are willing to help me.我不知道你是否愿意帮我。注意：whether和if的区别，请参考概述部分。（5）动词+间接宾语+宾语从句。动词如：advise, ask, inform, promise, question, remind, show, teach, tell, warn等，宾语从句前可以有一个间接宾语，这个宾语有时可以省略，有的不能省略。
He has informed me when they are to discuss my proposal.他已经通知我们将什么时候讨论我的建议。(me不可省略)
She promised (us) that she would give us more help later on.她答应以后给我们更多的帮助。(us可省略)
3、作介词宾语
It depends on whether he is coming or not.这要看他是否会来。
I was curious as to what we could do next.我想知道下一步我们该做什么。注意：that引导的宾语从句只在in, but, except, besides等少数介词后作宾语，形成固定搭配，in that在于（因为），but that要不是(只是)，except that除了……。
The higher income tax is harmful in that it may discourage people from trying to earn more.所得税过高是有害的，因为它可能使人不愿多赚钱。
His paper is perfect except that there were some misprints.除了一些印刷错误之外，这篇论文很好。
4、作形容词宾语。
No one can be sure what man will look like in a million years．谁也不知道一百万年后人类会变成什么样子。
I am not certain whether I have met him before.我不能肯定从前是否见过他。
I'm sorry (that) you're ill.你病了，我很难过。注意：that引导的从句在下列形容词后面作宾语，that可以省略。anxious, aware, certain, confident, convinced, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, hurt, satisfied, content, proud等。
I'm sure (that) he'll help you.我确信他会帮助你。
I'm glad (that)he has passed the exam.我很高兴，他考试及格了。
5、it充当形式宾语，真正的宾语---宾语从句后置。正如我们常用it充当形式主语代替主语从句一样，我们也常用it用作形式宾语代替宾语从句，把真正的宾语从句后置。特别是带复合宾语的句子中。在这种结构中that不可省略。有下列几种情况：（1）在believe, consider, declare, estimate, fancy, feel, find, guess,hear, imagine, know, make, prove, reckon, think, understand等动词接复合宾语（宾语＋宾补）时，要用it作形式宾语。
We find it difficult that we should finish the work on time．我发现我们按时完成工作有困难。
She thinks it wrong that he didn't answer the phone．她认为他不接电话是不对的。
（2）在like，enjoy，love,hate,take等表“喜怒哀乐”的动词，后若要跟宾语从句时，需跟形式宾语it。
I hate it when people talk with their mouths full.我不喜欢人们满口饭说话。
I like it that everyone passed the exam．都通过了考试我很喜欢。
（3）由动词和介词构成的短语动词后接that宾语从句时，要用形式宾语。
We are thinking of it that we'll lend you some money．我正在考虑借给你钱的事。
I shall see to it that he is taken good care of when you are absent.你不在的时候我负责把他照顾好。（4）用于“动词+宾语+介词短语”的句型中。
Keep it in mind that you have to be home by ten o’clock.要记住你得十点钟之前回家。
We took it for granted that he would come.我们认为他来是当然的'。
6、不可直接跟that从句的动词。下列动词不可直接接that从句：ask, refuse, let, like, cause, force, condemn, admire, entreat, dislike（厌恶）, overlook, love, help, take, forgive, bid, hate, hear（听见）, see（看见）, want（想要）等，但可用it, the fact做媒介，后接that从句；或接动名词、不定式。
He overlooked it that he had made another mistake.(正确)他忽视了一件事，他又犯了一个错误。
He overlooked the fact that he had made another mistake. (正确)
He overlooked that he had made another mistake.(错误)
I admire it that they won the match. (正确)
I admire the fact that they won the match. (正确)我很羡慕，他们赢得了比赛。
I admire that they won the match. (错误)
7、that引导宾语从句的省略。（1）主句谓语动词是agree, argue, hold, learn, maintain, observe, contend, conceive, reckon, remark, state, suggest, assume, announce, calculate, indicate等时，其后宾语从句的引导词that一般不可省略；主句谓语动词是hear, know, say, see, confess consider, declare, understand, propose等时，其后宾语从句的引导词that可以省略，也可以不省略；主句谓语动词是think, suppose, believe, presume, dare say等时，其后宾语从句的引导词that可以省略。
He suggested that we should set off at 8 o’clock tomorrow morning.他建议我们明天早晨8点走。(that不可省略)
I think (that) this is very important.我认为这很重要。(that可省略)（2）当一个句子很复杂，句中有多个状语时，that不可省略；或者一个句子有多个并列的宾语从句时，特别第一个宾语从句特别长，后面的宾语从句的that不可省略；谓语动词与that从句之间有插入语时，that不可省去。
He said you needn't worry and that he would help you .他说你没有必要着急，他会帮助你的。（said之后可省去that，但第二个that不可省去）
We decide, as he has suggested, that we will start out tomorrow.就像他建议的那样，我们决定明天动身。
8、否定转移与省略（1）如果主句的谓语动词是“think, consider, suppose, believe, expect, fancy, guess, reckon, imagine等，主语是第一人称的一般现在时态，其后的宾语从句如含有否定意义，一定要把否定词一道主句谓语上，从句谓语动词用肯定形式。
I don’t think he can do it better than me.我想他不会比我干得好。
I don’t believe he treated the child like that.我相信他不会那样对待孩子的。
（2）如果think, consider, suppose, believe, expect, fancy, guess, reckon, imagine等前有副词或表示强调的do, does, did；或者同其它词构成并列谓语；或者不以现在时出现；或者用作插入语中。这时候不用否定转移。
I really expect she didn’t say that to him.我确实希望她不和他说那件事。
I think and hope that he won’t be deceived by the man.我认为也希望他不会被那个人欺骗。
（3）think, consider, suppose, believe, expect, fancy, guess, reckon, imagine等此类动词后，在简略答语中，用so替代前文肯定的宾语从句；若替代一个否定的宾语从句，用not或not…so替代前文整个从句。
-I believe we've met somewhere before．我认为我们从前在哪见过。
-No，I don't think so．没有，我认为我们以前没见过。
-Do you think it's going to rain over the weekend？你认为这周末会下雨吗？
-I believe not．我认为不会。注意：hope只能说I hope not一种形式，因为hope不能否定转移。
9、时态的呼应与语序。
在宾语从句中只能用陈述句语序，时态呼应上要遵循以下三条原则：（1）如果主句谓语是一般现在时或将来时，宾语从句的谓语可根据意思的需要使用任何一种时态。
Can you make sure where Alice has put the gold ring？你能确定爱丽丝把金戒指放到什么地方了吗？
They have no idea at all where he has gone．他们一点也不知道他去了哪。
Do you know who he was talking with at eight last night？你知道他昨晚和谁一起说话吗？
（2）如果主句谓语是一般过去时，宾语从句要用表示过去的某一时态。
He said he would come to see us the next day.他说他明天将来看我们。
I wanted to know whether he had been to Beijing.我想知道他是否去过北京。
（3）如果宾语从句是表示客观事实、真理等，不管主句是什么时态，宾语从句一律用一般现在时。
Dick asked Lucy how old she is．迪克问露斯她多大了。
The teacher said the sun rises in the east．老师说太阳从东方升起。
要点
一、高中宾语从句要点之时态的呼应
1.如果主句是一般现在时、一般将来时或祈使句时,宾语从句可根据情况使用各种时态。例如:
I hear she is here today(she was here yesterday/ she will be here tomorrow.)
2.如果主句是一般过去时,宾语从句应使用过去时态的某种形式。例如:
He said he was watching TV(he had swept the floor/ he would play football after school)。
3.如宾语从句所叙述的是客观事实、自然现象或科学真理等,从句不受主句时态限制,仍用一般现在时。例如:
Our teacher told us that light travels faster than sound.
二、高中宾语从句要点之引导词的使用
1.当宾语从句由陈述句变化而来时,用that来引导从句,that常无具体意义,一般可省略。例如:
Lin Tao thought(that)the TV play was very boring.
2.当宾语从句是由一般疑问句变化而来时,要用if或whether来引导从句。例如:
David asked his mother if/ whether she liked the dinner last night.
3.当宾语从句是由特殊疑问句变化而来时,原句中的疑问词充当连接代词(如who, whose, what, which)或连接副词(如when, where, why, how),引导宾语从句。例如:
Do you know what we can do on the island?
I don’t know why Jane was late for school this morning.
三、高中宾语从句要点之语序的陈述化
宾语从句一般要用陈述句语序。例如:
When did he leave? I want to know. →I want to know when he left.
Does the shop close at six every day? Do you know? →Do you know if/ whether the shop closes at six every day?
四、高中宾语从句要点之否定转移
当主句的谓语动词为think, believe, suppose等动词,且主语为第一人称时,从句的否定要转移到主句上。例如:
I don’t believe he is here on time, is he?
I don’t think Tom is the best student in his class, is he?
高中if从句教案 篇4
标题：高中定语从句课件
随着高中英语课堂教学的不断深入，定语从句作为一种重要的语法现象也逐渐受到了广泛的关注。虽然定语从句的学习需要学生具备比较全面的英语语法基础，但是它的语言功能非常强大，可以让学生更加准确地表达语言意义，同时也可以更好地厘清句子结构和语言逻辑关系。因此，高中定语从句课件的开发和应用也逐渐成为了高中英语教学的一种重要手段和方法。
一、高中定语从句课件的内容
高中定语从句课件的内容通常包括以下几个方面：
1、高中定语从句的定义和基本语法特征，例如：定语从句的定义、定语从句和主句的关系、定语从句的引导词、定语从句的种类等。通过这些基本知识的系统化介绍，学生可以掌握定语从句的基本概念和语言特征，为后续的深入学习打下坚实的基础。
2、高中定语从句的使用方法和技巧，例如：定语从句的使用范围、定语从句的位置和形式、避免定语从句的重复或不必要等。通过这些使用方法和技巧的介绍，学生可以更加灵活地运用定语从句，让语言表达更加精准和自然。
3、高中定语从句的应用实例和习题分析，例如：文献摘要、科技论文摘要、报告、信函、演讲、口试、作文等。通过这些具体的实例和习题训练，学生可以更加深入地了解定语从句的应用场景，更加熟练地应用定语从句来表达语言意义。
二、高中定语从句课件的优点
高中定语从句课件具有以下几个优点：
1、互动性强。高中定语从句课件的设计通常以互动为主，通过多种互动方式来吸引学生的注意力和参与度。例如：课堂讨论、小组讨论、学生演示、仿写练习、在线测试等，从而让学生更加积极地参与到教学过程中来。
2、内容丰富。高中定语从句课件的内容涵盖了定语从句的定义、基本语法特征、使用方法和技巧、应用实例和习题分析等方面，可以更加全面地帮助学生掌握定语从句的相关知识和技能。
3、形式灵活。高中定语从句课件的形式灵活多样，例如：PPT演示、网络视频、在线教学平台等，学生可以根据自己的喜好和需求来选择最适合的学习方式。
三、高中定语从句课件的应用
高中定语从句课件的应用主要包括以下几个方面：
1、课堂教学。高中定语从句课件可以作为教师课堂教学的重要辅助工具，通过形象直观的演示和互动讨论，帮助学生更加深入地掌握定语从句的知识和技能。
2、网络教学。高中定语从句课件可以通过网络教学平台进行在线教学，让学生可以随时随地进行学习，同时也可以通过在线互动进行知识分享和交流。
3、自主学习。高中定语从句课件设计了各种形式的在线测试和练习，可以帮助学生独立进行学习和测试，提高自主学习的能力和效率。
总之，高中定语从句课件是一种非常重要的教学工具，在高中英语教学中具有非常广泛的应用和推广前景。通过定语从句教学的深化和完善，可以帮助学生更加全面地掌握英语语言知识和应用能力，同时也可以提高学生的语言交际能力和语言鉴赏能力，为学生未来的学习和发展打下坚实的基础。
高中if从句教案 篇5
教学过程
1、对上节课课后作业中的问题进行查漏补缺；
2、导入：
e.g. She is a beautiful girl.
She is a beautiful girl who drives me crazy.
1、定语从句：在复合句中，修饰某个名词或代词的句子（做这个名词或代词的
定语）叫定语从句，定语从句一般放在被修饰的名词或代词后面。
关系代词的种类：
关系代词：that, which, who, whom, whose, as
a、There she saw a wall of water that was quickly advancing towards her.
b、 In Japan, someone who sees another person making the gesture will think it means money.
c、Visitors can go on exciting rides where they can feel what it is like to do the things they have seen their heroes do in the movie.
d、Oprah Winfrey is a black woman whose rise to fame is an inspiring story.
限定性定语从句：从句对先行词进行必要的描述或说明，对先行词起修饰限定作用，从句与先行词紧密相连，缺少它则句义显得不完整，一般不用逗号隔开。 非限定性定语从句：对先行词进行补充说明，解释，它与先行词关系松散，用逗号隔开。
1、The man who gave me this book is Tom .(限定性)
2、Tom,who is reading a book ,is my classmate (非限定性)
1、who指人，在定语从句中作主语。
e.g. The man who is sitting under the tree is a German .
2、Whom指人，在句中做宾语，可省略，但在做介词的宾语是只能用whom,不能用who。关系代词前有介词时不能省略。
e.g. I know the girl (whom) the teacher is speaking to .
I know the girl to whom the teacher is speaking .
e.g. Everyone heplps the child whose parents are dead.
Theyare the lazy students whose homework wasn’t handed in .
4、that 指人或物，多指物，作主语（不能省略）或宾语（可省略）
e.g. He is the finest comrade that has helped us .
This is a plant that grows in the north .
5、which ,指物，在句中做主语（不能省略），或宾语（可省略）。
e.g. This is a plant which grows in the north .
1、当先行词是all, everything, anything, nothing, much, little, none, one等不定代词时，只用that。
Pay attention to everything that I do.
2、当先行词被序数词或形容词最高级修饰时，只用that。
This is the best novel (that)I have read.
3、如果出现两个或两个以上的先行词，并同时兼指人和物时，关系代词用that。 歌诀助记：两项并列人与物，引导定从用that。
They were talking about the person and things that they remembered in school.
4、当先行词被the only, the last, the way, the same等修饰时。
This is the last time that I shall give you a lesson.
5、在疑问词which开头的特殊疑问句中，为了避免重复只用that。
Which of the students that knows something about history.
6、当被修饰的成分是数词时，（被修饰成分是代名词one，指人时除外）只用that. I’ve got one that you might be interested in.
1、引导非限制性定语从句。
Football, which is an interesting game, is played all over the world.
全世界都踢足球，它是一项有趣的运动。
2、直接放在介词后作宾语时（介词+关系代词结构中）。
Language is the most important tool without which people can't communicate with each other.语言是最重要的工具，没有它，人们便无法交流。
（1）在定语从句中作状语，先行词主要为一些时间名词（year ,day ,time,week等）,但时间名词在从句中作主语，宾语时，应用that，which，不能用when
e.g. I’ll never forget the time when (during which ) we worked on the farm.作状语 I still remember the day that/which is his birthay.做主语
He regretted the days that /which he spent on play . 做宾语
（2）It is the first time that …句型中，that是习惯用法，不用when。
e.g. It is the first time that I have been to the Great Wall .
（1）指前面的地点，在从句中作状语。
e.g. I know the factory where I worked twenty years ago .
（2）指地点，在句中作主语，宾语时不能用where，须用that/which .
e.g. This is the house where he has lived for 20 years （作状语）.
This is the house that he has lived in for 20 years .（作宾语）
e.g. This is the shool ｛in which /where we study every year.（作状语）
This is the shool that /which we visited yesterday. （作宾语） .
“the reason why ….that…. ”中，不能用because 代替that .
e.g. That’s the reason why (for which ) he didn’t come to school .
The reason why he didn’t attend the meeting is that he was ill .
但reason 在从句中做宾语时，关系代词用that/which ,可省略
e.g. I don’t believe the reason (which/that) he gave me .
当先行词在定语从句中作介词的宾语时，往往可以把介词放在关系代词之前，构成“介词+关系代词（whom/which）”结构。但一些短语如look after 等中的介词不能与动词分开，故不能放在关心代词之前。确定介词时：
一是，依据定语从句中动词所需要的某种习惯搭配；
二是，依据先行词的某种习惯搭配；
三是，根据所要表达的意思来确定。
e.g. That’s the reason why (for which ) he didn’t come to school .
关系代词在非限定性定语从句中的用法。
指人做主语用who,作宾语用whom ，指地点用where，指时间when，指物只用which，不能用that，作定语用whose。
e.g. He didn’t see the film, which was very interesting .(不用that)
such ….as： 像….一样的，像…..之类；the same…as： 和…..同样的
在这两个句型中，as是关系代词，such和same 作定语，修饰主语里的某个名词（或代词），这个名词是由as引导的定语从句的先行词，as在从句中可担任主语、宾语或表语。
Eg： We have found such materials as are used in their factory.( 在从句中作主语) I seldom give my students such a difficult problem as they cannot work out.（在从句中作宾语）
The result is not the same as they had expected.( 在从句中作宾语)
重点比较 :
the same …as…和 the same …that…
两者都引导定语从句。as 从句中说明的名词与the same 修饰的名词是同一类，而非同一个。that从句中说明的名词与the same 修饰的名词是同一个。
Eg：He is reading the same book that you bought yesterday.
He is reading the same book as you bought yesterday.
This is the same pen that I lost. =This is the pen that I lost.(指同一支笔)
This is the same (kind/type/sort) of pen as I lost.（指同类型的笔，但并不是我丢失的那一支）
….such as …中的such为代词，意思是“这样的人或物”，as 在从句中作宾语，修饰先行词such。
Eg： This book is not such as I expect.
He told me of his experience such as I had never had before.
相关链接：
such as 还有“诸如，例如，像…那样的”的意思，此时后面跟名词或名词短语等。
Eg：They bought a lot of fruit, such as apples,oranges,etc.
as 可以像which一样引导非限制性定语从句，用来代表整个句子的内容，它的先行词可以是名词，也可以是不定式短语或整个句子。as 在从句中作主语、宾语和表语。此外，有些as 引导的定语从句已成为固定用法，如：
As we know As has been said before 如上所述 As is known to all As is often the case 像通常那样 As is reported As was expected 正如预料的`那样 Eg： She is very careful, as her work shows.
As we know, smoking is harmful to one’s health.
As is often the case, we have worked out the production plan.
重点比较：as 和which 引导的非限制性定语从句的联系和区别
1、as 和which 都可以代替整个句子，当定语从句置于主句之后时，as和which可以和互换。
Eg：He didn’t tell me any news, as/which upset me.
2、Which引导的从句，代表的前面的整个主句时，不能放在主句之前。而as 引导的定语从句，代表整个主句时，可以放在主句之前或之后，有时也可以放在主语和谓语之间。
Eg：As is reported in the newspapers, talks between the two countries are making progress.
= Talks between the two countries, as is reported in the newspapers, are making progress.
As 引导的定语从句表示它的内容与主句所讲的内容相似，即指同类事物；that 引导定语从句表示的内容与主句相同，即为同一事物。
e.g. This is the same pen that I lost yesterday .这正是我昨天丢的钢笔。
This is the same pen as I lost yesterday .这正像我昨天丢的钢笔。
1、同位语从句和定语从句结构相似，通常位于某一名词或代词之后，但两者存在明显区别：同为语从句对名词性成分加以补充说明，是该名词性成分具体内容的体现（相当于名词的作用）。That 引导的同位语从句中引导词that不在该同位语从句中充当成分，但不能被省略，同位语从句还可以用whether,how等连词引导（定语从句则不能）。定语从句对先行词加以限制或修饰，说明先行词的性质或特征（相当于一个形容词的作用），定语从句的引导词均在该定语从句中充当成分（that在其引导的限定性定语从句中充当主语，宾语或表语，充当定语从句的宾语，that可以省略）注意体会一下三组例句。
① We can’t solve the problem how we can travel faster than light .我们解决不
了如何才能超过光的速度这个问题。
② I can’t remember the problem that they have.我记不得他们的问题了。
① I won’t believe the fact that he lied to his mother.我不愿相信他对他母亲撒
② I won’t believe the fact (that) he told me .我不愿相信他告诉我的事实。
① The news that Tom would go abroad is told by him. 汤姆将出国的消息是他
讲的。
The news that he told me is that Tom would go abroad next year.他告诉我的消息是汤姆来年将出国。
例题1.【全国卷I】The prize will go to the writer ________ story shows the most imagination.
A. that B. which C. whose D. what
【解析】C。句意为“奖项将会颁发给故事展示了丰富想象力的作者。” 根据从句不缺成分和它与先行词的关系可判断前后为所属关系，选whose作定语。
例题2.〖10全国Ⅱ〗I refuse to accept the blame for something ________was someone else’s fault.
【解析】B。从句缺主语，先行词为物。
例题3.【2011江苏卷】Between the two parts of the concert is an interval, _______the audience can buy ice-cream.
A. when B. where C. that D. which
【解析】A。从句不缺任何成分，且先行词为时间。
例题4.〖08浙江〗Yesterday she sold her car, ______ she bought a month ago.
A. when B. where C. that D. which
【解析】D。从句缺宾语，且为非限制性定语从句。
例题5. (陕西)______ is often the case with children, Amy was better by the time the doctor arrived.
【解析】D。固定搭配“as is often the case”，像通常一样。
例题6. (浙江卷)Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.
A. which B. who C. where D. whom
1.The place _______interested me most was the Children's Palace.
A. Which B. where C. what D. in which
2.Do you know the man _______?
A. whom I spoke B. to who spoke C. I spoke to D. that I spoke
3.This is the hotel _______last month.
A. which they stayed B. at that they stayed
C. where they stayed at D. where they stayed
4.Do you know the year ______the Chinese Communist Party was founded?
A. which B. that C. when D. on which
5.That is the day ______I'll never forget.
A. which B. on which C. in which D. when
6.The factory ______we'll visit next week is not far from here.
A. where B. to which C. which D. in which
7.Great changes have taken place in the factory ____we are working since then.
A. where B. that C. which D. there
8.This is one of the best films _______.
A. that have been shown this year B. that have shown
C. that has been shown this year D. that you talked
9.Can you lend me the book ______the other day?
A. about which you talked B. which you talked
C. about that you talked D. that you talked
10.The pen ______he is writing is mine.
A.with which B.in which C.on which D.by which
本节课的知识点相对比较多但难度系数不大，主要是讲定语从句的各个关系词具体用法。主要从九个方面进行讲解，详细讲解了定语从句中各个关系代词、关系副词的用法和区别。本部分的学习还是要求学生掌握关键词，具体什么时候需要使用关系代词或者关系副词，什么叫做定语从句，希望学生能够保持思路清晰，做题的时候十拿九稳。
1. Nearly all the streets are in straight lines, ________ from east to west. Those ________ run from north to south are called avenues.
A. running; that B. run; who C. running; who D. run; that
2. This is the case ________ he’s had all his money stolen.
A. when B. where C. that D. on which
3. Mr. Smith will pay a visit to Beijing this autumn, ________ we will enjoy the Olympic Games in .
A. where B. when C. which D. how
4. The artist will not paint people or animals but he will paint anything ________ .
A. that the little girl asks him B. the little girl asks him to
C. for the little girl to ask him D. what the little girl asks him
5. —How did you get in touch with the travel agent, Robin?
—Oh, that's easy. I surfed the Internet and then called one ________ the telephone number is provided.
A. which B. in which C. of which D. whose
6. October 15 th is my birthday, ________ I will never forget.
A. when B. that C. what D. which
7. The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
A. when B. where C. which D. whose
8. There are several research centers in China ________ a certain disease called Bird Flu is being studied.
A. which B. where C. when D. what
9. I hope that the little ________ I have been able to do does good to them all.
A. which B. what C. that D. when
10. The time is not far away ________ modern communications will become widespread in China's vast countryside.
A. as B. when C. until D. before
这节课总体感觉课堂进程比较自然、顺利，学生始终处在主动参与和积极配合的状态中，达到了预期设想，体现了“学中用，用中学”的任务型语言教学理念。定语从句是中学英语教学的一个重要语法项目。学生在学习这一语法时，虽然感到困难很大，但理清语法知识点之后也觉得定语从句语法知识结构清晰并易于理解。希望学生课后能主动巩固并复习，同时加强单词记忆。
高中if从句教案 篇6
高中 if 从句教案
if 条件语句是英语中最基本的语法结构之一，也是我们学习英语时首先要掌握的知识点之一。if 从句分为三种类型：零条件从句，一般条件从句和虚拟条件从句。在高中学习中，if 从句不仅是英语语法中的基础知识，更是各个考试的重要考点。因此，掌握好 if 从句将对学英语及应对考试都将有很大的帮助。
I. 零条件从句
1. 定义
“零条件从句”又称“真实条件句”，表示现实中某件事情发生。即如果某一条件满足，就会出现某种情况或行动。
2. 例句
If you heat ice, it melts.
如果你加热冰，它就会融化。
3. 用法
（1）句子的两个部分之间用“，”分隔，if 句放在主句前面；
（2）从句和主句的时态，我们通常都使用现在时。
4. 练习
（1）上面的句子转换成否定句和疑问句。
If you don’t heat ice, it won’t melt.
如果你不加热冰，它就不会融化。
Do you melt ice if you heat it?
如果你加热冰，它会融化吗？
（2）根据下列句子完成 if 从句。
1. The sun rises in the east.
If ___________________________________________________
2. The year has four seasons.
If ___________________________________________________
3. People need air to breathe.
If ___________________________________________________
4. Water boils at 100℃.
If ___________________________________________________
II. 一般条件从句
1. 定义
一般条件从句表示的是可能会发生的情况，一般使用“if+动词的一般时”来表示，且主句用将来时态。
2. 例句
If it rains tomorrow, we will stay at home.
如果明天下雨，我们就呆在家里。
3. 用法
（1）主句用将来时态，if从句用一般现在时。
（2）在 if 从句中可使用情态动词 should, can, may, might 等代替 will。
（3）在 if 从句中，还可以使用 be going to + 动词原形来表示未来的计划或决定。
4. 练习
（1）将下列句子改成一般条件从句：
1. I will go to see a movie if I am free tonight.
_______________________________________________________
2. He will finish his homework if he works hard.
_______________________________________________________
（2）用 if 从句的适当形式来完成下列句子。
1. There is a party next weekend.
If _______________________________________________________
2. You have to study if you want to pass the exam.
If _______________________________________________________
3. We should wear warm clothes if it gets cold.
If _______________________________________________________
III. 虚拟条件从句
1. 定义
虚拟条件从句分为三种：
- 虚拟条件句–过去式
- 虚拟条件句–将来时态
- 虚拟条件句–过去完成时态
虚拟条件从句表示的是某种不可能或未实现的情况或条件，而不是真实的情况或条件。其语气比较委婉，前两种类型虚拟条件从句用来表示现在或未来的情况，第三种用来表示过去可能不会发生的情况。
2. 例句
If I had known the answer, I would have told you.
如果我知道答案，我会告诉你。
3. 用法
（1）虚拟条件句-过去式：
if从句要用过去完成式，主句要用“would/could/should/might + have + 过去分词”来表示对过去情况的虚拟推测。
如果if从句的主语是第一人称（I/we），并且表示对过去事情的惋惜、遗憾，或者后面跟有“but”表示实际情况与现在不符，可以使用“if only”来代替“if”，此时主句仍然要用 “would/could/should/might + have + 过去分词”。
（2）虚拟条件句–将来时态：
如果if从句中的动词是动词的过去分词（had gone, had left, had finished等），但表示的却是未来的情况，主句则要用：“would/could/should/might + 动词原形”。这种情况多用于假设现在是过去的某一时刻，其后的情况和结果都是虚拟的。
4. 练习
（1）将下列句子改写成虚拟条件从句。
1. I can’t help you because I have a meeting now.
If _________________________________________________________
2. We didn’t take the subway and we missed the train.
If _________________________________________________________
（2）请根据下列情况，完成虚拟条件从句。
1. Tom didn’t win the game.
If _________________________________________________________
2. If Jack had studied harder, he would have gone to college.
If _________________________________________________________
3. We can’t see the sun today because it is cloudy.
If _________________________________________________________
结论
if 从句是英语语法中的基础知识，在高中学习中占据着重要的地位，可以通过针对性的练习巩固或增强students的记忆，达到提高英语水平的目的。反复练习以上例句和IELTS/TOEFL通过历年真题with if 从句的题，可帮助students掌握不同类型的 if 从句。
高中if从句教案 篇7
语序为v.+主语+谓语+由if、whether引导宾语从句；
连接宾语从句的从属连词主要有that,if,whether，和疑问词（what， how， where， when ...)。
that引导表示陈述句的宾语从句，
if和whether，whether...or not引导表示“是否”的一般疑问句的宾语从句。
连接代词主要有who,whom,whose,what,whoever,whomever,whosever,whatever,whichever等。
连接代词一般指疑问，但what,whatever除了指疑问外，也可以指陈述。
连接副词主要有when,where,why,how,whenever,wherever,however等。
例句：
He didn’t tell me when we should meet again.
他没有告诉我什么时候我们能再见面。
大多数及物动词都可以带宾语从句。
部分“动词+副词”结构也可以带宾语从句。
动词短语也可以带宾语从句，常见的这些词有：
make sure（确保）、make up one’s mind（下决心）、keep in mind（牢记）
①动词find,feel,consider,make,believe,think等后面有宾语补足语的时候，则需要用it做形式宾语而将that宾语从句后置。
②有些动词带宾语从句时需要在宾语从句前加it（双宾语）这类动词主要有：hate,take,owe,have,see to.award,lend.hand,mail,offer,pass,pay,post,read,return,show,teach,tell
用whether之类的介词宾语从句。
用that,if引导的介词宾语从句，有时候except,but,besides三个介词后可见到that引导的宾语从句。
有些形容词具有动词的含义，所以也可以带一个宾语从句；
例句：
I am sorry I am late.
I am glad that you can join us.
Are you sure his answer is right?
常用来引导宾语从句的形容词有：sure,certain,glad,pleased,happy,sorry,afraid,satisfied,surprised
if和whether在作“是否”理解时，引导宾语从句常放在动词know,ask,care,wonder,find out等之后，介词后一般不用if。
少数动词，如：leave,put,discuss,doubt后的宾语从句常用whether。
whether后可以加or not,但是if不可以。
在不定式前只能用whether。
一般“no matter”后表示“是否”用whether而不用if。
存在以下情况时引导词that不可省略：
that作learn,suggest,explain,agree,wonder,prove,mean,state,feel,hold等动词的宾语。
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