总结好的: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

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。

If 引导的条件状语从句

If 引导的条件状语从句

If 引导的条件状语从句If引导的条件状语从句需要遵循主过从过、主将从现的原则。

例如,如果明天下雨,我就不会去爬山。

如果明天不下雨,我就会和朋友去乡村。

如果你帮我,我就能按时完成。

如果明天天气好,我们可能会出去。

如果你完成了作业,你就可以看电视。

如果你下周日去购物,请给我打电话。

如果我去那里,我会给她带些花。

如果明天下雨,我们会待在家里。

如果他在家,请给我打电话。

如果你更加努力,你就能通过考试。

如果她明天有时间,她会去看望她的爷爷。

如果火车没有准时到达,我们会坐出租车去市区。

如果老师迟到了,他会生气。

除此之外,如果否定形式的if可以转换成肯定形式的unless,例如你如果不努力,你就不能通过考试,可以转换成你除非努力,否则你就不能通过考试。

With your help。

I will be ___.If you wake up early。

you will arrive on time.Wake up early。

or you will be late.If you wake up early。

you won't be late for school.Wake up early。

and you will catch the early bus.1.I will tell you about your friend.Answer: A。

come2.If you go to college。

you will get a good ___. Answer: A。

will get3.I want to know if they will come tomorrow. Answer: B。

will come4.___ exercise。

and you'll be in good health. Answer: D。

and5.If it doesn't rain。

he will play ___.Answer: If it doesn't rain。

if 引导的条件状语从句

if 引导的条件状语从句

条件状语从句由引导词if或unless引导的状语从句叫做条件状语从句。

在英文中,条件是指某一件事情实现之后(状语从句中的动作),其它事情(主句中的动作)才能发生,通常译作"假如"。

注意:在含有条件状语从句的复合句中,表示将来时态,主句是一般将来时态,祈使句或情态动词,从句要用现在时态,[主将从现原则](主将从现,将并非指将来时,还指表示将来含义的,跟着if后的那句话是从句。

语法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:1)If you ask him,he will help you.如果你请他帮忙,他会帮你的。

2)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引导的条件状语从句既可以将从句放前面也可以将从句放后面(如果天下雨,我们就不玩了)If it rains,we will stop playing.'转为We will stop playing if it rains.unless=if...not.e.g.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.if引导的条件句有真实条件句和非真实条件句两种:真实条件句如:If it rains tomorrow,we won't go on a park非真实条件句是虚拟语气的一种,表示与事实相反,如:If I were you,I would go with him.so/as long as只要由as(so)long as,in case引导。

So long as you're happy,it doesn't matter what you do.只要你高兴,你做什么都没有关系。

知识点名:if引导的条件状语从句

知识点名:if引导的条件状语从句

知识点名:if引导的条件状语从句讲义:if引导的条件状语从句1. if意为“如果”,引导条件状语从句时,既可放在主句前面,也可放在主句后面。

若if条件句放在句首,从句后面常加逗号与主句隔开。

If you go there, I'll go, too.如果你去那儿,我也会去。

My mother will take me to the park if she is free.如果我妈妈有空,她就会带我去公园。

2. 时态运用:在含有if引导的条件状语从句的主从复合句中,主句为下列情形之一的,条件状语从句通常用一般现在时。

(1) 主句是一般将来时,即遵循“主将从现”的原则。

If he comes, he will bring his violin.如果他来,他就会把他的小提琴带来。

(2) 主句是含有情态动词may/might/can/must/should等的句子。

If you want to lose weight, you must eat less bread.如果你想减肥,你必须少吃面包。

(3) 主句是祈使句。

If you are not strong enough, please don't take part in such an activity.如果你不是很健壮,请不要参加这种活动。

3. 句型转换:(1) 借助“祈使句+and/or+陈述句(一般将来时)”这一句型来转换。

其中,在句意上and表示顺承;or表示转折,意为“否则”。

If you work hard, you'll pass the exam easily.=Work hard, and you'll pass the exam easily.努力学习,你将很容易通过考试。

Work hard, or you won't pass the exam easily.努力学习,否则你不会轻易地通过考试。

if引导的条件状语从句总结(精)

if引导的条件状语从句总结(精)

if引导的条件状语从句总结(精)if引导的四种条件状语从句一、零条件句/绝对真实条件句(Zero Conditional)零条件句,又叫绝对真实条件句,用于阐述事实。

用来表达在该条件下,结果一定会如此(如规则,客观规律、真理等)。

结构是:If+主语+do/does,主语+do/does。

其从句和主句的谓语动词通常为一般现在时。

二、第一条件句/相对真实条件句(First Conditional)第一条件句又叫相对真实条件句,谈论将来可能发生的事情,并考虑这件事情的结果。

强调偶然性或一次性的条件,也可以与绝对真实条件句同义。

if从句用一般现在时或其他现在时,表示将来可能发生的事情(条件);主句用一般将来时,表示这件事情的结果。

结构是:If+主语+do/does,主语+will do。

三、第二条件句/现在虚拟条件句(Second Conditional)第二条件句是虚拟条件句的一种,即现在虚拟条件句(Unreal Present),用来表达在现在或将来时间下不太可能或不可能发生的条件,这种条件句还可以用来表示试探性的、委婉的语气(可以理解为不大有自信,所以不太真实的条件)。

结构是:①与将来事实相反的非真实条件句是If+主语+should do/were to do/did,主语+would/should/could/might do;②与现在事实相反的非真实条件句是If+主语+did,主语+would/should/could/might+do。

四、第三条件句/过去虚拟条件句(Third Conditional) 第三条件句是表示与过去事实相反的虚拟语气,是用来表达如果(If)当时那样发生,另外一方面(当时)结果会如何。

通常是指过去的事情,带有一切已经太迟而不能够补救的意思。

结构是:If+主语+had done,主语+would/should/could/ might+have done。

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2.if从句用一般现在时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted.3.if从句用一般现在时,主句用must/shouldIf you want to lose weight you must/should eat less bread.4.if从句用一般现在时,主句用一般现在时5.if从句用现在进行时,主句用一般将来时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.。

条件状语从句的归纳总结

条件状语从句的归纳总结

条件状语从句的归纳总结条件状语从句是英语中重要且常用的一种从句类型,它用于表示某个动作或情况发生的前提条件。

在句子中,条件状语从句通常由指示条件的连词引导,如:if(如果)、unless(除非)、provided that(倘若)、as long as(只要)等。

本文将对条件状语从句进行归纳总结,并提供常见的应用实例。

一、以if引导的条件状语从句1. 表示真实条件“如果”某个条件成立,就会发生某个结果。

例句1: If it rains tomorrow, we will stay at home.(如果明天下雨,我们会待在家里。

)例句2: If you study hard, you will pass the exam.(如果你努力学习,你会通过考试。

)2. 表示与现在或将来相反的假设“如果”某个条件成立,但事实上并不成立。

例句1: If I were you, I would apologize to her.(如果我是你,我会向她道歉。

)例句2: If I had enough money, I would buy a new car.(如果我有足够的钱,我会买一辆新车。

)3. 表示过去某个假设的结果“如果”过去某个条件成立,就会有相应的结果。

例句: If he had studied harder, he would have passed the exam.(如果他当时学得更努力,他就会通过考试。

)二、以unless引导的条件状语从句unless的意思是“除非”,用于表示某个条件不成立时才会发生某个结果。

例句1: We won't go shopping unless it stops raining.(除非停止下雨,否则我们不会去购物。

)例句2: You won't lose weight unless you exercise regularly.(除非你定期锻炼,否则你无法减肥。

if 引导条件状语从句

if 引导条件状语从句

if 引导条件状语从句
(最新版)
目录
1.条件状语从句的定义和作用
2.if 引导条件状语从句的用法
3.if 引导条件状语从句的例句分析
4.if 引导条件状语从句的翻译技巧
正文
一、条件状语从句的定义和作用
条件状语从句是英语中一种常见的状语从句类型,主要用于表示在某种条件下,主句所表达的内容是否成立。

条件状语从句在主句之前出现,通常由连词 if 引导,表示“如果”的意思。

在英语中,条件状语从句起到连接作用,使句子更加连贯。

二、if 引导条件状语从句的用法
if 引导条件状语从句时,主句通常使用一般将来时,而从句则使用一般现在时。

这种时态搭配是条件状语从句的一种固定用法。

另外,if 引导的条件状语从句在翻译时,通常翻译成“如果……就……”的形式。

三、if 引导条件状语从句的例句分析
例如:If it rains tomorrow, I will stay at home.(如果明天下雨,我就待在家里。

)在这个例子中,if 引导的条件状语从句表示在某种条件下(明天下雨),主句所表达的内容(我待在家里)是否成立。

四、if 引导条件状语从句的翻译技巧
翻译 if 引导的条件状语从句时,需要注意以下几点:
1.翻译时,将条件状语从句翻译成“如果……就……”的形式。

2.注意时态搭配:主句一般使用一般将来时,从句使用一般现在时。

3.确保翻译的句子通顺、连贯,符合汉语表达习惯。

综上所述,if 引导条件状语从句在英语中起到连接作用,表示在某种条件下,主句所表达的内容是否成立。

If引导的条件状语从句

If引导的条件状语从句

5. If you __d_o_n_’_t _w_o_rk___(not work ) hard , you _w_o_n_’_t _p_as_s_(not pass) the exam.
6. If she __m__e_n_d_s_(mend) the computer , her father __w_o_n_’t_b_l_am__e_(not blame ).
1.有if引导的条件状语从句的复合句中,当主句和从句的 主语均为you时,可转换为“祈使句,and+简单句”或
“祈使句,or+简单句” You can pass the exam if you work hard. Work hard ----------------,and you will pass the exam.
If you don't hurry up,you will be late again.
or Hurry up,------ you will be late again.
2. 借助介词with 或without来转换。
例如: If you help me, I’ll finish my job soon.
If引导的条件状语从句
潘店镇中学
if引导的条件状语从句
例句:If people obey the traffic rules, →从句 there will be fewer accidents. →主句
if:从属连词,意思是:“如果,假如,倘若”
: 结构
if引导的条件状语从句既可以放在句子前, 也可以放在句子后。
时态:
if引导的条件状语从句, 主句用一般将来时(will),从句用一般现在时。
→主句谓语中也可以含有情态动词, 如:must,can,could,should等

总结好的:IF引导的条件状语从句

总结好的:IF引导的条件状语从句

总结好的:IF引导的条件状语从句IF引导的条件状语从句是英语中常见的一种从句,通过if引导一个条件,通常用于表示假设、条件等语境下的情况。

本文将对IF引导的条件状语从句进行全面的总结,包括用法、语法特点、注意事项等方面,以帮助读者更好地掌握这一语法点。

一、用法2.表示可能性:If he comes early, we’ll have time to chat.(如果他早到,我们将有时间聊天。

)3.表示建议:If I were you, I would take a break.(如果我是你,我就休息一下。

)4.表示对过去事实的假设:If he had studied harder, he would have passed the exam.(如果他学得更用心,他就能通过这次考试。

)二、语法特点1.时态:条件从句一般使用一般现在时、一般过去时或过去完成时,而主句则根据实际情况使用对应的时态。

2.语序:条件从句的语序与主句相同,即主语+谓语+宾语。

3.连接词:if是最常用的连接词,但在口语中也可使用unless(除非)或provided that(倘若)等。

4.反意疑问句:在IF引导的条件状语从句中,如果主句使用肯定形式,则条件从句要使用否定形式,反之亦然。

如:If she likes coffee, she’ll drink it, won’t she?(如果她喜欢咖啡,她会喝的,对吗?)5.省略:当从句主语与主句主语相同时,可省略从句主语。

如:If you come, I'll be happy. → If come, I'll be happy.三、注意事项1.区别IF和WHETHER:IF表示条件,而whether表示选择,因此在从句中不能用whether代替if。

2.在条件从句中使用“虚拟语气(subjunctive mood)”,表示假设的情况,一般包括三种情况:(1)表示现在或未来时,使用“would/could/might+动词原形”表示虚拟语气。

If引导的条件状语从句

If引导的条件状语从句

If引导的条件状语从句很多英语学习者都觉得If引导的条件状语从句这个句型很难,学习起来很吃力。

下面是店铺为你整理的If引导的条件状语从句的相关资料,希望大家喜欢!If引导的条件状语从句用法1.if引导的条件状语从句可以放在主句之前,也可以放在主句之后,如果放在主句之前,中间要用逗号将主句和从句隔开。

例如:If I am free, I will come to see you.= I will come to see you if I am free.如果我有空,我就来看你。

2. 在含if引导的条件状语从句的复合句中,主句用一般将来时,从句通常用一般现在时态表示将来意义,即“主将从现”原则。

例如:If it snows tomorrow, we will go skiing.如果明天下雪,我们就去滑雪。

3. 在含if引导的条件状语从句的复合句中,语句的谓语还可含有情态动词can、must、may等,主句也可是祈使句。

例如:If it stops raining, we can go out.如果雨停了,我们就能出去。

4. 在含if引导的条件状语从句的复合句中,如果主句部分描述的是客观事实或真理,要用一般现在时。

例如:If you heat the ice, it turns into water.如果你加热冰,它就会变成水。

if引导的非真实条件句对过去的虚拟条件从句(if):主语+had done 主句might/would/should/could+have done对现在的虚拟if+ 主语+动词过去式(be用were)主句might/would/should/could+do对将来的虚拟if+主语+动词过去式(be用were)或主语+should do或主语+were to do主句 might/would/should/could+doe.g.Tom got to the station in time because he started earlier.If Tom had started late, he would have missed the train.Do you think the thief entered through the door?No, if he had, I don't believe, he would have broken the living room window.If the book weren't so expensive, I would buy it.If you didn't live so far away, we would be able to visit you more.What would you do if you lost your passport in a foreign country?Why hasn't he come? If he should not come on time, we would have to put off the trip.2.注意事项e.g.If she hadn't work hard at English in the past, she wouldn't work as well as a secretary in a large company now. 混合时间的虚拟语气从句为对过去的虚拟,主句是现在。

总结好的:if引导的条件状语从句

总结好的:if引导的条件状语从句

总结好的:if引导的条件状语从句if引导的条件状语从句if1) ⽤法:(1)条件状语从句通常由连词if引导,意为“如果、假如”,主句不能⽤be going to表⽰将来,⽽应该⽤shall,will。

If you leave now, you are never going to regret it. (错误)If you leave now, you will never regret it. (正确)(2)if “如果”,引导条件状语从句,主句⽤⼀般将来时,从句则⽤⼀般现在时,如:If it rains tomorrow, I shan’t climb the hills.(3)另外,主句是祈使句或含有情态动词,从句也⽤⼀般现在时。

如:Please call me if he comes next Sunday.Can you call the policeman if you are in the trouble.注意宾语从句中的if与条件状语从句if的区别。

宾语从句中的if“是否”相当于whether,引导宾语从句,时态需根据语境确定。

如果主句⽤⼀般现在时,从句可以根据具体情况选⽤时态,如果主句⽤⼀般过去时,从句必须⽤过去式的某种形式。

I don't know if it will rain tomorrow. 我不知道明天是否会下⾬。

Our teacher said there was going to be a football match the next month.我们说下⽉将有场⾜球⽐赛。

【边学边做】⽤括号内所给词的正确形式填空。

1. What will you buy if you ________(have)a lot of money?2. If it ________(not snow)tomorrow, we will feel unhappy.3. You mustn’t go to school if you ________(be)still in bed.4. If he _______(be)at home at that time, he would know it.5. Please show me the way if you ________(know)it.6. You will hurt your teeth if you ________(eat)too much candy.7. If you gave me a toy car, I _________(be)very happy.8. I would get the prize if I _________(work)hard.9.If she ______ (finish ) work early ,she ______(go) home.10.If the weather______(be)fine,we_______(go)for a walk .11. If I_____(have) time tonight ,I _______(finish) the book I’m reading.12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable .13. If it_______(rain),we______(stay) at home .14.If she______(arrive) ,she _____(phone) me .15. If he_____(call),tell him I’ll ring back .⼆、⽤所给词的适当形式填空1. If you ________(feel) tired, you _________ (have) to have a rest.2. Where _____ he ____(see) the film if he _________(have) time?3. If there ____ (be) fewer trees, there _______ (be) more pollution.4. He ___ (dress) more casually if he ___ (not work) on weekends.5. If Marcia _______ (live) alone, she _______ (keep) a pet parrot.6. Lana _____ (buy) a new dress if the old one ____ (be) out of style.7. The twins _______ (fight) if they__________ (argue).8. I ______ (have) a bake sale if I ____ (need) money for education.9. Peter ____ (send) me a beautiful souvenir if he ____(tour) Spain.10. If Mr. Green _______ (say) I am hard- working, my parents ___ (feel) glad.11. I ______ (go) to the beach if it________ (not rain) this week.12. _____they ___ (have) a match if the P.E. teacher __ (be) busy?13. He ____ (write) a letter to his grandparents if he ____ (get) his report card this week.14. If she ______ (get) up late, she _____ (not catch) the early bus.15. Peter ____ (major) in English if he ____(pass) the exams in Peking University.⼆、完成句⼦1. 他如果看电视太久了,他的⽗母会不⾼兴。

If引导的条件状语从句

If引导的条件状语从句

编辑课件
4
变换:
1.有if引导的条件状语从句的复合句中,当主句和从句的 主语均为you时,可转换为“祈使句,and+简单句”或
“祈使句,or+简单句”
You can pass the exam if you work hard. Work hard ----------------,and you will pass the exam.
for you , it will be good for your study.
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5. If you __d_o_n_’_t _w_o_rk___(not work ) hard , you _w_o_n_’_t _p_as_s_(not pass) the exam.
6. If she __m__e_n_d_s_(mend) the computer , her father __w_o_n_’t_b_l_am__e_(not blame ).
W--i-t-h--y--o-u--r--h--e-l-p-, I’ll finish my job soon. 如果你帮我,我将很快完成我的工作。 If there is no water, fish may die.
Fish may die w--i-th--o--u-t--w--a--t-e-r--. 如果没有水,鱼可能会死。
I won’t go there unless I hear from you.(同义 if 句) don’t
I won’t go there _____ I _____hear from you. I won’t go to the party if I am not invited. (同义 句) unless I won’t go to the party_____ I am invited.

if引导的条件状语从句

if引导的条件状语从句

if引导的条件状语从句表示假如从句的动作发生,主句的动作就(不)会发生。

if 引导的条件状语从句位置灵活,可直接放在主句后面,也可以放在句首。

放在句首时,从句后面要用逗号和主句隔开。

如:I’ll go to see you if I have time. 如果有时间,我就去看你。

If it rains tomorrow, we’ll stay at home. 如果明天下雨,我们就呆在家里。

在复合句中:⑴当主句是一般现在时或是一般将来时时;(2)当主句是祈使句时;(3)当主句含有情态动词时,if引导的条件状语从句通常用一般现在时。

如:If she doesn’t come, she will be sorry. 如果她不来,她会遗憾的。

Have a good rest if you are tired. 如果累了,你就好好休息一下。

We must study hard if we want to pass the final exam. 如果想通过期末考试,我们必须努力学习。

1. 用“祈使句+ and / or +一般将来时的句子”转换。

如:If you work hard, you’ll pass the exam easily. → Work hard, and you’ll pass the exam easily. 努力学习,你将很容易通过考试。

If you don’t hurry up, you’ll miss the train. → Hurry up, or you’ll miss the train. 快点儿,否则你就赶不上火车了。

2. 用含介词with或without的介词短语转换。

如:If there is no water, fish can’t live. → Fish can’t live without water. 离开水,鱼不能生存。

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 引导的条件状语从句

if 引导的条件状语从句

一、if 引导的条件状语从句,主句用一般将来时,从句一般现在时。

即“主将从现”连词if的意思是“如果”,它引导的句子表示某事发生所需要的条件,即“在……条件下某事才能发生”,在句子中充当状语,因此我们称之为条件状语从句。

在复合句中连词if引导的句子为从句,被修饰的句子为主句。

从句可以放在主句后,也可以放在主句前,从句放在主句前时,应用逗号将它与主句隔开if_______If you study hard, you will get good grades.I _won’t_ play basketball this afternoon if it_ __rains___.I ___will_ play basketball this afternoon if it __doesn’t_ _rain.练一练1. If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going2. – What are you going to do tomorrow? --We’ll go to the library tomorrow if it ___.A. isn’t rainB. rainC. won’t rainD. doesn’t rain3. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came4. There _________a basketball match in our school tomorrow afternoon, if it doesn’t rain.A. will be B will have C have D is用go与rain的正确形式We_______ to the Great Wall if it ____________ tomorrow.If it ______________ tomorrow, we___________to the Great Wall.二、as soon as的用法“一···就···”的意思主句用一般将来时,从句一般现在时。

if引导的条件状语从句

if引导的条件状语从句

if引导的条件状语从句一、概念条件状语从句是表示主句动作发生的前提或条件的从句,即“在......条件下某事才能发生”。

通常由连词if引导二、位置if引导的条件状语从句可位于主句之前或之后。

位于主句之前要用逗号与主句隔开;如果放在主句之后,其前不必用逗号。

三、时态若主句为一般将来时、祈使,或主句含有can、may、must、 have to等情态动词或短语时,if引导的条件状语从句要用一般现在时。

(主将从现)例句:1.If it rains tomorrow, I won't go to school.=I won't go to school if it rains tomorrow.如果明天下雨,我就不去上学。

2.If he watches TV, I will watch TV,too.如果他看电视,我也会看电视。

3.You can pass the exam if you study hard.如果你努力学习,你就能通过这次考试。

四、句型相互转换:①祈使句+and/or+一般将来时的句子If you are quick, you won 't be late for school.= Be quick, and you won't be late for school.= Be quick, or you will be late for school.②含有介词with或without的句子If there is no water, fish can 't live. =Fish can't live without water.五、if还可引导宾语从句,意为“是否”。

I don't know if he will come back tomorrow.我不知道他明天是否回来。

If 条件状语从句归纳总结

If 条件状语从句归纳总结

If 条件状语从句归纳总结1. if意为“如果”,引导条件状语从句,可放在主句后,也可放在主句前,常用逗号隔开。

如题1。

2. 含if引导的条件状语从句的复合句中,主句有下列情况时,从句用一般现在时表示将来意义。

①当主句为一般将来时态时。

如:If your daughter comes, I will call you up.②当主句是祈使句时。

如:Please stay at home if it rains tomorrow.③当主句的谓语含有can, may, must等情态动词时。

如:If he goes on smoking, it may be very bad for his health.④当主句的谓语是hope, wish, want等动词时。

如:I want to go there if the rain stops.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。

练习:1. If he hard, he will get good grades.A. studyB. studiesC. will studyD. studied2. I want to know if Mary to the party tomorrow.A. goB. wentC. will goD. goes3. Everyone must dress up. If you , they won’t let you in.A. don’tB. won’tC. can’tD. mustn’t4. Mary will go to Sanya if she a five-day trip.A. haveB. hadC. will haveD. has5. If he comes late, he will miss the train.A. andB. soC. /D. or6.如果你请他帮忙,他会帮你的。

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

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”。

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if引导的条件状语从句if1) 用法:(1)条件状语从句通常由连词if引导,意为“如果、假如”,主句不能用be going to表示将来,而应该用shall,will。

If you leave now, you are never going to regret it. (错误)If you leave now, you will never regret it. (正确)(2)if “如果”,引导条件状语从句,主句用一般将来时,从句则用一般现在时,如:If it rains tomorrow, I shan’t climb the hills.(3)另外,主句是祈使句或含有情态动词,从句也用一般现在时。

如:Please call me if he comes next Sunday.Can you call the policeman if you are in the trouble.注意宾语从句中的if与条件状语从句if的区别。

宾语从句中的if“是否”相当于whether,引导宾语从句,时态需根据语境确定。

如果主句用一般现在时,从句可以根据具体情况选用时态,如果主句用一般过去时,从句必须用过去式的某种形式。

I don't know if it will rain tomorrow. 我不知道明天是否会下雨。

Our teacher said there was going to be a football match the next month.我们说下月将有场足球比赛。

【边学边做】用括号内所给词的正确形式填空。

1. What will you buy if you ________(have)a lot of money?2. If it ________(not snow)tomorrow, we will feel unhappy.3. You mustn’t go to school if you ________(be)still in bed.4. If he _______(be)at home at that time, he would know it.5. Please show me the way if you ________(know)it.6. You will hurt your teeth if you ________(eat)too much candy.7. If you gave me a toy car, I _________(be)very happy.8. I would get the prize if I _________(work)hard.9.If she ______ (finish ) work early ,she ______(go) home.10.If the weather______(be)fine,we_______(go)for a walk .11. If I_____(have) time tonight ,I _______(finish) the book I’m reading.12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable .13. If it_______(rain),we______(stay) at home .14.If she______(arrive) ,she _____(phone) me .15. If he_____(call),tell him I’ll ring back .二、用所给词的适当形式填空1. If you ________(feel) tired, you _________ (have) to have a rest.2. Where _____ he ____(see) the film if he _________(have) time?3. If there ____ (be) fewer trees, there _______ (be) more pollution.4. He ___ (dress) more casually if he ___ (not work) on weekends.5. If Marcia _______ (live) alone, she _______ (keep) a pet parrot.6. Lana _____ (buy) a new dress if the old one ____ (be) out of style.7. The twins _______ (fight) if they__________ (argue).8. I ______ (have) a bake sale if I ____ (need) money for education.9. Peter ____ (send) me a beautiful souvenir if he ____(tour) Spain.10. If Mr. Green _______ (say) I am hard- working, my parents ___ (feel) glad.11. I ______ (go) to the beach if it________ (not rain) this week.12. _____they ___ (have) a match if the P.E. teacher __ (be) busy?13. He ____ (write) a letter to his grandparents if he ____ (get) his report card this week.14. If she ______ (get) up late, she _____ (not catch) the early bus.15. Peter ____ (major) in English if he ____(pass) the exams in Peking University.二、完成句子1. 他如果看电视太久了,他的父母会不高兴。

If he _____ TV too much, his parents ________ ______unhappy.2. 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.3. 如果他有空,他会帮助你的。

If he ____ ____, he ______ ____ you.4. 如果Tom考试不及格,他就没有机会上高中了。

Tom ______have the _____to go to the high school if he ________the exams.5. 你如果抄同学的作业就不能学好各门功课。

You _______ _____ good at all the subjects if you ______ the other students’ homework.Module5练习题1.If she goes to a different school, I B. won’t see C. see D. saw2.That’s pity! You play B. such a, such C. such a , so D. so a, such3.My teacher says that if I harder, I do well in my exam.A. don’t, willB. won’t, don’tC. won’t, won’tD. don’t, won’t4.He used to ask strange questions after class. (so // such)5.She has children that she didn’t know what to do. A. so B. such C. so many D. such many6.We won’t go fishing if tomorrow. A. it rains B. it will rain C. it would rain D. it rained7.–Tony, don’t play that kind of joke any more. --Sorry! I do it again.A. won’tB. can’tC. mustn’tD. wouldn’t8.–What are you going to do this summer holiday? –I yet.A. haven’t decidedB. won’t decidedC. have decidedD. didn’t decide9.What (happen) if Steve doesn’t tell his father the truth?10.She says she can finish the book next Monday. A. read B. reading C. to read D. reads11.the day, we were tired but happy.A. At the end of B. By the end of C. At the end D. In the end12.you pass me your dictionary? A. Should B. Could C. Need D. Must13.He knows the computer? A. a lot of, about B. a lot, about C. a lot, of D. a lot of, with14.I’m a student, ?(反义疑问句)15.Everything is ready, ?16.I was doing my homework at the library instead of the shelves.A. tidy upB. to tidy upC. to tidying upD. tidying up17. A rich man worry about his next meal.A. needs not toB. needs notC. need not toD. does not need to三用所给词的正确形式填空18.I think you should offer (pay) for the computer.19.He’ll realize that you are (true) sorry.20.Has Steve told his father the (true)?21.It’s (true) that I play a lot of basketball.22.She (攒钱) a lot of money to buy the shoes.23.But if you aren’t honest, she’ll be even (angry) with you.st week, I was doing my homework at the library instead of (tidy) up the shelves.25.They have warned him about ( not work) hard.26.What (happen) if Steve doesn’t tell his father the truth?27.I’m a student, ?(反义疑问句)28.Everything is ready, ?29 What have her parents warned her (not do)? We shall go for a walk rather than (watch) TV.30 I’d rather (stay) at home than (go) out on such a cold day.31The students were tired after they finished四根据首字母提示完成下列句子1. The doctor w__________ me not to drink too much.2. It's a p_______ that you can't come.3. Please wait until the e______ of this month.4. At the end of the term, we’ll have a f________ exam.5. The thief (贼) broke into the house and s_________ a lot of money.6. Can you m_____ my watch? It doesn't work.7. It will cost at l_______ ten dollars.8. There are many books on those s_________.9. H______ up, or you will be late.直接引语&间接引语引述别人的话时,一般采用两种方式:一是引用别人的原话,把它放在引号内,称为直接引语;二是用自己的话加以转述,被转述的话不放在引号内,称为间接引语。

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