if 引导条件状语从句
If引导的条件状语从句
If引导的条件状语从句一、If引导的条件状语从句的结构If+主语+谓语+其它,主语+谓语+其它.=主语+谓语+其它+if+主语+谓语+其它.注：①有if 的是从句,另一个是主句② if 从句在前有逗号，if从句在后无逗号eg.If he runs, he will arrive there in time .=He will arrive there in time if he runs .如果他跑，她将会准时到达.二、if条件句主句和从句的时态，if译为如果1.主句用一般将来时（will+ V-原），if 从句用一般现在时（be用is/am /are ,实义动词用V-原/V-三单）, 即主将从现注：①当主语为I ,you, we, they ,复数名词，以及由and连接的两个并列成分等时，实义动词用V-原②当主语为he ,she ,it ,that ,单个人名，单数名词等时，用V-三单）eg .If it is (be) rainy , we will stay(stay) at home .If she studies (study ) hard , she will get (get) good grades .2.若主句中含有情态动词(can/may/ must/may/might/should )时，主句为情态动词+ V-原，if从句用一般现在时eg .We can will go(go) out if it stops (stop ) raining .eg.If you want (want) to get good grades ,you should study (study)hard.3.若主句为肯定祈使句或否定祈使句时，if从句用一般现在时注：以V-原开头的句子是肯定祈使句，否定祈使句在V-原前加Don’teg. Eat (eat) them if you are (be) hungry .eg. Don’t go (not go)to play football if she doesn’t finish (not finish)your homework .拓展:if 还可引导宾语从句，译为“是否”If 引导宾语从句时，时态需根据语境确定，如果主句是一般现在时，从句可以根据具体情况选用时态，如果主句是一般过去时，从句必须跟过去时相关( )1.----Mike wants to know if _________ a picnic tomorrow .----- Yes . But if it _________ , We will visit the museum .A. will you have , will rainB. you will have , will rainC. you will have ,rainsD. will you have , rain( )2.We are not sure if it ____ tomorrow .If it ____ , our sports meeting will be put off .A. will rain , rainsB. rains , will rainC. will rain ; will rain ( )3. ---Can you guess if Mike _______ swimming this afternoon ?---I think he will go with us if he _______ fine .A. will go ,isB. will go ,will beC. goes , isD. goes ,will be答案解析：1.迈克想知道是否你们明天将去野营，if译为是否，引导宾语从句，时态根据语境而定，句末有tomorrow , 所以要用将来时。
if 条件状语从句
if引导的条件状语从句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：一，第一类：1）表示普遍真理和客观事实：If you heat ice ,it melts .If you pour oil on water,it floats.不受时间限制的自然法则的条件句，主句，从句都是一般现在时。
2）表示习惯性的动作If I make a promise , I take it .If it rains ,I go to work by car.表示一个现在习惯性的动作，主句和从句的谓语动词都是一般现在时。
3）表示过去的习惯性，经常的动作If it rained,I went to work by car.If I was hungry, I usually had a full meal.主句和从句谓语动词要依据时间来变为一般过去时。
questions and answers :What do you like to drink if you are very thirsty?How many days are there in February it it is a leap year ? Who do people go and see if they get ill ?第二类：If we catch the 10 o’clock train ,we shall (will ,can,may,must ,should ) get there in time .If it is fine tomorrow ,we can have a picnic somewhere.If you wake up before me , give me a call .条件句（从句）用一般现在表示将来，主句用shall 加动词原型或者是祈使句在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。
if条件状语从句语法
当句末为or not时，引导词只能用whether而不能用if.
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If 与whether 区分
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
3 If she__w__in_s___ (win) the prize ,we _w_i_ll_b__e_(be) happy. 4.If I __d_o_n_’__t _e_at (not,eat )so much ,I _w__il_l _g_e_t__(get) thinner.
5.If you __te_l_l __(tell) them, they __w_o_n_’__t__b_e_li_e_ve(not,believe) you. 6 I __w_i_ll_s_t_a_y_(stay) at home,If it ___ra_i_n_s____( rain). 7.If it _d__o_e_s_n_’__t ___(not,rain) ,I __w__il_l _g_o__( go) out.
5. 以下从句中will不是未来时助动词，而是情态动词。 翻译为“愿意”。
If you will excuse me,I really must go to bed . 假如你能原谅我话，我真要睡觉了。
If you will wait a minute ,I’ll go and tell my mother that you are here .
If you are free this weekend, what will you do ?
【英语知识点】if引导的条件状语从句
【英语知识点】if引导的条件状语从句
If是一个连词，作为连词后面常常会引导一个句子，这个句子就是状语从句。
例句If it rains tomorrow，I will not go，如果明天下雨我就不会去。
这个条件状语从句叫做主将从现，主语用将来时，从句用一般现在时。
注意：在if的条件状语从句中，主句为下列情形之一时，if条件状语要用一般现在时。
1.主句是一般将来时（主将从现）
例如：If he es, he will tell me all.如果他来了，他会告诉我所有（的事情）。
2.主句是含有情态动词may/might/can/must/should等句子。
例如：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
例如：If you are not strong enough, please don't take part in such an activity.如果你不够强壮，请不要参加这种活动。
if作为从属连词,可引导条件状语从句、让步状语从句和名词从句。
具体如下：
①if可以表示条件，假如主句用将来时,if从句用现在时表示将来。
②if可以表示虚拟，为假如、要是。
③if引导的条件从句中可以省略be和主语。
④if可引导名词性从句,作“是否”解,常放在ask，doubt，know，learn，see，wonder等动词后。
一般用在口语中,而且不能用于句首。
感谢您的阅读，祝您生活愉快。
If引导的条件状语从句
--We’ll go to the library tomorrow if it __D_.
A. isn’t rain B. rain C. won’t rain D.will you do if you _____Ato the old folk’s
home visit?
2． I ____ her the answer if she ____me. A.can Dtell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks
3. – What are you going to do tomorrow?
If 引导条件状语从句的时态为一般现在时
记住“主将从现”
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----Sam, do you know if Alice ____to my party next week?
----I think she will come if she ____ free.
A comes; is B will come; will be C will come; is D comes; will be
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可放在主 句之后
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1. Can you tell me if she can come to the meeting ?
2. She will not go there if it is rainy tomorrow.
3. I can’t guess if she will be angry . 4. If we help each other , we both will get
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。
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.。
if引导的四种条件状语从句
if引导的四种条件状语从句1. If it rains tomorrow, I won't go out. For example, imagine you planned a picnic, and then it starts raining. Wouldn't you be a bit disappointed and change your plans?2. If I have enough money, I'll buy that dress. Like, you see something you really love but don't have the cash, how frustrating is that?3. If she comes here, I'll be so happy. Just think, if that special person shows up, won't your heart just leap with joy?4. If he doesn't study hard, he won't pass the exam. You know, it's like building a house without a solid foundation, it's bound to collapse.5. If we leave now, we can catch the movie. Say, you really want to see that movie and you know if you don't hurry, you'll miss it.6. If they invite me, I definitely will go. Isn't it great when you get invited to something you really want to do?7. If I win the lottery, I'll travel the world. Imagine being able to go anywhere and see all those amazing places.8. If she doesn't apologize, I won't forgive her. You know how itfeels when someone wrongs you and doesn't say sorry?9. If he keeps being lazy, he'll never achieve his goals. It's like trying to run a race while sitting down!10. If we work together, we can achieve great things. Just like a team pulling together to win a championship.My view is that these if clauses really show how different choices and situations can lead to different outcomes. They make us think about what might happen and how we would react.。
总结好的：IF引导的条件状语从句
if引导的条件状语从句if条件句：条件句用于陈述语气，表示假设的情况可能发生，其中if 是“构 成条件从句主 句时 态If＋一般现在时主语＋shall/will+动词原形例 句If he comes,he will take us to the zoo.1)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 PekingUniversity.二、完成句子1. 他如果看电视太久了，他的父母会不高兴。
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。
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if 引导条件状语从句
摘要：
1.条件状语从句的定义
2.if 引导条件状语从句的语法结构
3.if 引导条件状语从句的用法和实例
正文：
条件状语从句是用来表示一个条件，即如果某个条件成立，那么就会发生某个结果。
在英语中，条件状语从句通常由if 引导。
语法结构：
if + 条件从句（主语+ 谓语+ 其他成分）
主句（主语+ 谓语+ 其他成分）
if 引导条件状语从句的用法和实例：
1.肯定句中的条件状语从句
If it is hot, we will go to the beach.（如果天气热，我们将去海滩。
）
2.否定句中的条件状语从句
If it is not hot, we will go to the park.（如果天气不热，我们将去公园。
）
3.一般疑问句中的条件状语从句
Will you help me if I need your help?（如果我需要你的帮助，你会帮助我吗？）
4.特殊疑问句中的条件状语从句
What will you do if you win the lottery?（如果你中彩票，你会做什么？）
通过以上实例，我们可以看到if 引导条件状语从句在各种句子类型中的用法。