if引导的条件状语从句总结(精)
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引导的条件状语从句精讲与专题练习
if引导的条件状语从句精讲与专题练习初中英语――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：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从句用普通目前时，主句用普通将来时If he runshe’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/canIf the fog gets thicker the plane may/might be diverted.假如雾在大一些，飞机可能就会改在此外机场下降。
If it stops snowing we can go out.如果雪停了，我们就可以出去。
if 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“如果… , 假如…”，表示在某种条件下某事可能发生。
含有if引导的条件状语从句的复合句由主句和从句构成。
If引导的是完整的句子，一定要有主语，称为从句，另一个句子称为主句。
句子结构：1. 祈使句/ 主句（will do ）/ 主句（can / must / should 等+do）+if条件状语从句2. if条件状语从句, + 祈使句/ 主句（will do ）/ 主句（can / must / should 等+do）1. Drop in on me if you have time . = If you have time , drop in on me .2. I will help you do housework if I finish my homework earlier .= if I finish my homework earlier , I will help you do housework .3. Y ou must study hard if you want to pass the exam . = If you want to pass the exam , you must study hard .特别注意：（1）上述情况下，条件状语从句必须用一般现在时态表示将来动作。
不可用一般将来时。
（2）if条件句和”祈使句+and / or+简单句”句型的转换Hurry up , or you’ll be late .= If you don’t hurry up, you will be late .Go straight ahead , and you will find the post office . = If you go straight ahead , you will find the post office .(3) unless 引导条件状语从句，可以和if转换。
(完整版)if条件状语从句_语法
What will I do if it is sunny this weekend?
Part1:If 的用法
1.I want to know if he will go to park with us. 宾语从句 2. We will have a picnic if it doesn’t rain.
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
If I’m late, _I _w_i_ll__s_a_y_rrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
3. If you boil water, it becomes steam.
4. If you feel tired, you must have a rest. 条件状语从句
语法1：if作为宾语从句 的引导词，引导宾语从 句。（是否）
语法2：if（如果）引 导的条件状语从句
❀ if 用于宾语从句中
当句末为or not时，引导词只能用whether而不能用if.
If 与whether 的区别
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
if引导的条件状语从句(讲义及答案)
if引导的条件状语从句（讲义及答案）You will keep healthy if you do more exercise.If you do more exercise, you will keephealthy.1.时态：if 引导的条件状语从句用表示将来，主句可以使用一般将来时，含有情态动词的句子或者祈使句。
主将从现If you practice speaking English more, you will like itbetter. If she goes to New York tomorrow, I will go there,too.My sister will be very happy if our uncle comes next week.练习：If Nancy the exam, she will go to Australia forEnglish study.A.passB. passedC. passesD. will passIf the weather fine, we have a sports meeting next weekend.A. will be; willB. is; willC. was; wouldD. was; will主情从现If you get up at six tomorrow morning, you can catch the first bus. If you go to study in America next year, you must learn English hard.主祈从现Let’s go out for a walk if it doesn’t raintomorrow. If you see a snake in the forest, don’tmove!unless也可引导条件状语从句，表示“如果不，除非”Unless he comes here in an hour, I will go there alone.If he doesn’t come here in an hour, I will go therealone.You will feel worse unless you go to see the doctor right now.You will feel worse if you don’t go to see the do ctor right now.练习：you read it, you can’t imagine how interesting the story is.A. UnlessB. BecauseC. AlthoughD. If —Please give Alice the story book you see her.—All right.A.unlessB. orC. butD. ifExercises一、单项选择( )1. Studying in groups is necessary you want to do well in school.A.ifB. untilC. unlessD.though ( )2. —Will you help me with the trouble?—I won’t you tell me the truth.A. ifB. butC. afterD. unless( )3. If Bob away from the junk food, he will be in good health.A. stayB. will stayC. staysD.stayed ( )4. If Tom thegame, we’ll give him a surprise.A. winB. winsC. wonD.winning ( )5. We’ll go to the park if ittomorrow.A. won’t rainB. don’t rainC. doesn’t rainD.rain ( )6. If you’re more careful, youmuch better.A. doB. will doC. are doingD. did( )7. If there no buying and selling of animals, there no killing in nature.A. is; will beB. will be; will beC. is; isD. will be; is( )8. I’m waiting for my friend. If he ,Iswimming alone.A. doesn’t come; goB. won’t come; goC. won’t come; will goD. doesn’t come; will go二、翻译9.如果明天不下雨，我会去看你的。
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_条件状语从句
if_条件状语从句条件状语从句（讲解&练习）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：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。
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。
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. 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/shouldIf you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。
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。
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。
条件句表真实，主将从现要遵从；条件句非真实，虚拟语气用到位。
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。
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遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）If it rains tomorrow,I won’t climb the hills.If it doesn’t rain tomorrow,I will go to the countryside with my friends.If 引导的条件状语从句If 引导的条件状语从句遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）If you will help me,I'll finish it on time.We may go out if it's fine tomorrow.If you finish your homework,you can watch TV.Please call me if you go shopping next Sunday.If I go there，I'll take her some flowers.We'll stay at home if it rains tomorrow.Please call me if he’s at home.If you work harder,you’ll pass the exam.She will visit her grandpa if she has time tomorrow.We’ll take a taxi to the city if the train doesn’t arrive on time.The teacher will be angry if he is late.If引导的条件状语从句与unless引导的条件状语从句的转换If+否定形式=unless+肯定形式You won’t pass the exam if you don’t work hard.=You won’t pass the exam unless you work hard.If you don’t go to bed earlier,you will feel tired in the morning. =Unless you go to bed earlier,you will feel tired in the morning. If it doesn’t rain,he will play with me tomorrow.=Unless it rains,he will play with me tomorrow.If she doesn’t come,I’ll go shopping alone=Unless she comes,I’ll go shopping alone.if条件状语从句与祈使句,and/or＋一般将来时的句子转化If you get up early,you’ll get there on time.=Get up early,and you’ll get there on time.=Get up early,or you won’t get there on time.If you get up early，you won't be late for school.=Get up early，and you won't be late for school.=Get up early，or you will be late for school.If you don’t get up early,you won’t catch up with the early bus. =Get up early,and you will catch up with the early bus.=Get up early,or you won’t catch up with the early bus.if条件状语从句与without的句子转化If there is no water,we can't live.=We can't live without water.If there is no water,fish will die.=Fish will die without water.If you help me,I’l l finish the work soon.=With your help,I finish the work soon.if条件状语从句与祈使句,and/or＋一般将来时的句子转化If you get up early,you’ll get there on time.=Get up early,and you’ll get there on time.=Get up early,or you won’t get there on time.If you get up early，you won't be late for school.=Get up early，and you won't be late for school.=Get up early，or you will be late for school.If you don’t get up early,you won’t catch up with the early bus.=Get up early,and you will catch up with the early bus.=Get up early,or you won’t catch up with the early bus.1. your friend ,I'll tell you.eB.will comeesD.are coming2. If you go to college，you a good education.A.will getB.getC.getsD.got3.I want to know if they tomorrow.eB.will come C comes D.came4.Take enough exercise, you'll be in good heath.A.orB.soC.butD.and5.If it (not rain),he (play)basketball withme tomorrow.6.If Uncle Lan ______(come),I______(call)you up.7.She must see a dentist if she______(have)a toothache.8.Please wake me up if he______(come)back.9.Hurry up！Or you ______(be)late again.10.If you don’t be quick,you(be)late.1.We won’t wait for you you can’t arrive on time.A.untilB.whenC.afterD.if2.The children will go to the zoo if it (not rain)this Saturday.3.If she work hard,she be able to go to colleage.A.not,notB.won’t,won’tC.won’t,doesn’tD.dpesn’t,won’t4.If I run every day,I (be)healthier.5.If it (not rain),he (play)with me tomorrow.6.She must see a dentist if she (have)a toothache.7.Study hard,or you (not pass)the test.8.If you (not go)to bed earlier,you will feel tired in the morning.9.If he (be)free tomorrow,he will come to your birthday party.10.We will go to the zoo if it (not snow)tomorrow.。
if 引导的条件状语从句6.27
A. be; have B. is; will have C. will be; will have B 2. If you bring snacks to the party, the teachers ___________. A. take it away B. will take them away C. took away them C 3. I will give the book to him if he _________here next Sunday. A. come B. will come C. comes A 4. I don’t know if he __________here tomorrow. A. will come B. comes C. come
if 引导的条件状语从句
(1) if从句的构成 当我们要表示“如果……”时,就会用到if引导的条 件状语从句。 if引导的条件状语从句表示在某种条 件下某事很可能/不可能发生。它的构成有： • if从句（一般现在时） + 祈使句 • if从句（一般现在时） + 陈述句（将来时）
• If you need help, please call me. • If you want to know more about it, please telephone our teacher. • If it rains tomorrow, we will not go to the zoo. • She will come to see me if she has time.
其中if引导的是一个完整的句子，一定要有主语。
(2) if从句的位置 if引导的条件状语从句既可放在主句之后, 又可放在主句之前(但须用逗号隔开)。 • Print the text if you like it. • If you like the text, print it. • Look at the blackboard if you can’t remember the words. • If you can’t remember the words, look at the blackboard.
初中英语If引导的条件状语从句(可编辑修改word版)
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。
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的用法
（3）假设
真的，或者有可能成为真的；
（二）假设将来，假设的条
将来
件是将来可能实现的。
1. if 非真实条件句（虚拟）——假设现在
（二）遵循的原则
should do
might+do
例 7 If I _____(be) a bird,I would fly to you right
状态，是正在玩球的意思，
所以此空填 is playing。
3. if 引导的真实条件状语从句——假设将来
例 3 If it _____(rain) tomorrow,we will stay at home.
解析：如果你不想受伤，
就不要玩刀。根据 Don’
t
play with the knife,主句是祈使句，所以从句为 if 引导
to the park.
he will take me to the park,主句用的一般将来时，而且
可以分析出，他哥哥现在还没有回，所以从句为 if 引
导的表将来的条件状语从句。根据“主将从现”的原
则，此空填 comes。
2. if 非真实条件句（虚拟）——假设过去
例8
Years ago if someone_____ (turn) round to
批改学生作文时，遇到拼写错误较多的学生可以这样
及各个时代相关代表作品的赏析，感受中西方文化的
评价：
不同，提高其审美水平；在进行人教版（2014）高中英
neat and tidy！
学生参观学校的科学实验室或者本地的科技馆，感受
1. 认 同 欣 赏:I like your handwriting，which is so
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引导的状语从句
【2011山东潍坊】 6. If Tom _____ the game, we'll give him a surpri se". A. win B. wins C. won D. miming 答案： 【解析】考查if引导的条件状语从句。在if引 导的条件状语从句中，如果主句和从句发生的动作 都在将来时间，从句用一般现在时表将来。故选B。
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 upstai rs. 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 t he bill. 如果你吃完了，我就叫服务生来算账
if引导的宾语从句
if 引导宾语从句时，意思为：是否，从句的时态通常要 和主句保持一致。 I want to know if he lives there. 我想知道他是否住在那儿。 He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别
3. 只能用whether的情况 在动词不定式之前只能用 whether： I can’t decide whether to stay. 我不能决 定是否留下。 在whether …or not 的固定搭配中： I want to know whether it’s good news or not. 我想 知道它是不是好消息。 在介词后，只能用whether： His father is worried about whether he loses his work. 他的父亲担心他是否会失去工作。 用if会引起歧 义时： Could you tell me if you know the answer? 这句话 有两种意思： “你能告诉我你是否知道答案吗？”或“如果你知道答 案，请告诉我，好吗？”。 如用whether则可避免歧义。
If 引导的条件状语
Look and say
If the telephone rings, I will answer it
If you feel hungry, you should eat something.
If you are ill, you must go to see a doctor.
主句（一般将来时or情态动词） + if 从句（一般现在时）
2 Complete the sentences using your own ideas.
If I don’t finish my homework, the teacher will be angry . If I eat too much lunch, I will not feel well . If I don’t get enough exercise, I’ll be ill/ I won’t be .in good health . If I watch too much TV, it will be bad for my eyes .
If 引导的条件状语从句
当if 意为“如果”时，由他引导的 从句叫条件状语从句。 主将从现 主句用一般将来时 或主句谓语中 含情态动词 （如must, can, could, should等时， if引导的条件状语从 句用一般现在时表示将来意义。 If从句在前，逗号隔开。 If you work hard, your dream will come true. = Your dream will come true if you work hard.
如果明天我忙我将不去看你。 to see if am I won’t ____ ____ ____ you __ I ___ ____ go busy ____ tomorrow. 如果我努力学习，我就能取得好成 绩。 will/can get ___ I ____ hard, I ________ ____ If work good marks. 如果你喜欢它，我就把它送给你。 like _____ you ____ it, I ____ _____ it If will give ____ you. to
If_条件状语从句归纳总结
If 条件状语从句归纳总结一．. if意为“如果”，引导真实条件状语从句，可放在主句后，也可放在主句前，常用逗号隔开。
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.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. mus tn’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. or适当形式填空：1. If she ______ ( run) every day , she will be much stronger .2. If you _____ ( be) late for school , your teacher _____ （be）angry .3. If Mary ______ (win)the prize , her parents will be proud of her .4. If Tom _____ ( not do ) it , his brother ______ (do) it .5. We _____ ( get) into trouble if the workers _______ ( not help ) us .6. Please _______ ( tell ) me if you _______（go）.7. I _______ ( leave) for Beijing if it ________ ( not snow) this afternoon .8. If it _______（not rain）tomorrow , _____（let）us go shopping .9. If I get up late tomorrow , I _______ (be)late for school .10. Please bring your ID card . If you ______ (not bring) your ID card , you can’t go to the party .11. If he _____ (offer) to help me with my English , I’ll be very happy .12. Mother told me if I ______ ( do) something wrong I should say sorry to her .13. If it ______ (snow) tomorrow , we’ll build a snowman .14. If somebody _______ ( wait) for you , you may go now .15. If he ______ (go) to the party , I _______ ( go) , too .16. Could you tell me if my father ______ ( arrive) home on time ?17. If my father _____ ( have) time tomorrow , he’ll take me to the zoo .18. _____(visit) the place if you _____ ( are ) interested in it .19. If you have a cold , _____ ( drink) water as much as possible .20. If you _____ ( not be ) happy , _______ ( try) ______( listen) to your favorite music .（）1.If you _____ to the party, you’ll have a great timeA. will goB. wentC. goD. going（）2.–What are you going to do tomorrow? --We’ll go to the library tomorrow if it ___. A. isn’t rain B. rain C. won’t rain D. doesn’t rain（）3. What will you do if you _____ to the old folk’s home visit?A. goB. wentC. goingD. will go（）4. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too（）5. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came（）6. I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks7. We’ll go to the farm and help the farmers with the apple-picking if it ____ tomorrow. A. won’t rain B. will be rainy C. doesn’t rain D. isn’t raining【2011陕西】24. If there no buying and selling of animals, there no killing in nature. A. is; will he B. will be; will be C. is; is D. will be; is答案：A 【解析】考查点：本题考查if引导的状语从句的时态。
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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.。