八年级英语上册 if引导的条件状语从句作业 人教新目标版

he sometimes made careless mistakes himself.
careless做形容词，意为“粗心 的”“不小心的”, 在句中可用作定语或表语。 如：It was careless of you to leave the door unlocked. 你没锁门，太粗心了。 The careless waiter dropped the dish onto the ground. 那个粗心的侍者把盘子摔到了地上。
Language points
1. If people have problems ,they should try to keep them to themselves. keep....to oneself意为“保守秘密”， 如：One must keep such interests to oneself. 有这类爱好不该让人知道。 We should keep their worries to themselves。 我们应该为他们的忧虑保守秘密。 keep....to oneself还可意为“不与人来往；不交际”， 如：Keep sb at arm's length not allow oneself to become too friendly with sb. 与某人保持距离;不使自己太亲近某人。
Students these days often have a lot of worries. Sometimes they have problems with their schoolwork, and sometimes with their friends. What can they do about this? Some people believe the worst thing is to do nothing. Laura Mills, a teenager from London, agrees. ”Problems and worries are normal in life,” says Laura. “But I think talking to someone helps a lot. Unless we talk to someone, we’ll certainly feel worse.”

Unit 10If you go to the party，you'll have a great time!Section B & Self CheckSection B 2ba．If people have problems，they should get advice from an expert.b．If people have problems，they should talk to other people.c．①If people have problems，they should try to keep them to themselves.Students these days often have a lot of worries：Sometimes they have problems with their schoolwork，and sometimes with their friends.What can they do about this？Some people believe the worst thing is to do ura Mills，a teenager from London，agrees.“Problems and worries are normal in life，” says Laura.“But I think talking to someone helps a lot.②Unless we talk to someone，we'll certainly feel worse.”Laura once lost her wallet，and worried for days.She was afraid to tell her parents about it.She even walked three miles to school each day because she didn't have any money.She just kept thinking，“If I tell my parents，they'll be angry！” ③In the end，she talked to her parents and they were really understanding.④Her dad said he sometimes made careless mistakes himself.They got her a new wallet and asked her to be more careful.“I will always remember to share my problems in the future！” Laura says.Robert Hunt advises students about common problem s.He feels the same way as Laura.“It is best not to run away from our problems.⑤We should always try to solve them.” He thinks the first step is to find someone you trust to talk to.This person doesn't need to be an expert like himself.⑥Students often forget that their parents have more experience than them，and are always there to help them.⑦In English，we say that sharing a problem is like cutting it in half.So you're halfway to solving a problem just by talking to someone about it！,a．如果人们遇到问题，他们应该从专家那儿得到建议。

2019年秋八年级上册单元语法讲与练if引导的条件状语从句语法精讲1.条件状语从句的含义由一个主句和一个或一个以上的从句构成的句子叫复合句。

在复合句中作状语的句子叫作状语从句。

状语从句根据它表达的意思可分为很多种，if引导的句子在复合句中表示条件，作主句的条件状语，因此称为条件状语从句。

If you don’t hurry，you’ll be late.如果你不快点，你将会迟到的。

If he comes，let me know.如果他要来，通知我。

2.if引导的条件状语从句的结构if引导的条件状语从句在句中的位置比较灵活，可以放在主句之前(这时要和主句用逗号隔开)，也可以放在主句的后面(不用逗号)。

条件状语从句的结构为：if+陈述句，主语+谓语(=主语+谓语+if+陈述句)。

意为“如果……就……”。

If you ask him，he will tell you the answer.如果你问他，他就会告诉你答案。

I hope to visit her if I’m free.如果我有空，我希望去看望她。

3.if引导的条件状语从句与主句时态的一致性在复合句中，从句中动词的时态在一定程度上受到主句动词时态的制约，英语语法中称为时态呼应。

（1）在含有条件状语从句的复合句中，如果主句是一般将来时，从句则用一般现在时代替一般将来时表将来。

If it rains，I will stay at home.如果下雨，我将待在家里。

If you study hard，you will pass the examination.如果你努力学习，就能通过这次考试。

（2）如果主句含有must，may，can等情态动词，从句也要用一般现在时。

If you drive too fast，you may have an accident.如果你把车开得太快，你可能会出事故。

You must stop if the traffic light is red.如果红灯亮了，你必须停下来。

八年级英语上册语法专项练习班级考号姓名总分条件状语从句及情态动词should等一、用括号中所给单词的适当形式填空。

1.What will you buy if you (have) a lot of money?2.If it doesn't (snow) tomorrow, we will feel unhappy.3.You will hurt your teeth if you (eat) too much chocolate.4.Please show me the way if you (know) it.5.They (lose) the game unless they try their best.6.If I see him again, I (tell) him what you said.7.What ( happen) if they don't agree with each other?二、单项选择。

1.I don't know if Tom to the meeting tomorrow.If he , so will I.A.goes; goesB.will go; will goC.goes; will goD.will go; goes2.Mrs.Green will take her son to the amusement park if she the tickets.A.gotB.getsC.is gettingD.will get3.(南京中考)You need to practice speaking every day you hope to improve your spoken English.A.ifB.althoughC.unlessD.until4.(自贡中考) -Would you like to help me clean the house this weekend?-I'd like to I finish my homework.A.beforeB.thoughC.if5.(武威中考) We try our best to fight against pollution.A.shouldB.mayC.mustn'tD.needn't6.(武汉中考)-Only ten tickets? What do you mean? There be twelve.- Sorry, Linda.Jacky and Tim took two tickets away.A.shouldB.willC.canD.may三、同义句转换。

（完整版）if条件状语从句练习与答案if_条件状语从句的时态练习及答案_初中习题集I.单项选择1.If you to the party, you’ll have a great time.a.will gob. wentc. god. going2.It will be a long time peter his work.a.since, has finishedb. after, finishesc. when, will finishd. before, finishes.3.what will father us from Japan?a.takeb. bringc. carryd. make4.Weifang is famous kitesa.forb. toc. ond. with5.I her the answer if she me.a. can tell, will askb. will tell, will askc. would tell, askd. will tell, asks6.– 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 rain 7.—Do you know when he will come back tomorrow?--sorry, I don’t know. when he back, I’ll tell you.a. comesb. will comec. comed. may come8.what will you do if you to the old folk’s home visit?a.gob. wentc. goingd. will go9.If I eat food, I’ll be very fat.a.too manyb. many tooc. too muchd. much too10.I’ll give the book to him if he here next sunday.a. will comeb. comesc. is comingd. came11. There an english film in our school tomorrow.a. is going to haveb. will havec. is going to bed. has12.Could you tell us where ？a.will the next olympic games heldb.the next olympic games will be heldc.would the next olympic games be heldd.the next olympic games would be held13.When my mother returned last night,I a book.a. readb. am readingc. was readingd. am going to read14.What you when it began to rain?a. do, dob. were, doingc. are, doingd. did, do15.I’ll wake you up when he back.a. willb. is going to comec. comesd. comeII、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./doc/d011234800.html,na (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.I f 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.III. 完成句子1.如果他到的晚了会发生什么事情？What if he late?2.如果努力学习，你就会取得好成绩。

_I_w_i_ll_/m__u_s_t_s_e_e_a__d_o_c_t_o_r ___, if I’m ill.
If it rains tomorrow, won't/ can't play basketball he______________________.
He can eat some rice, if _h__e_f_e_e_l_s_/_i_s_h_u__n_g_r_y_.
3. Please call me if you come back.
if 条件状语从句中，主句是祈使句，从句用 _一__般__现__在__时___表示将来。 Don’ t wait for me if I __a_m__ (be) late.
Exercises Make sentences according to the pictures.
Revision
Look at the pictures and make sentences with “ if ”.
If you go to the party with Karen and Anna, you’ll have a good time.
If you wear jeans to the party, the teachers won’t let you in.
含if条件状语从句的主从复合句 1. If you go there by bike, you will be late.
if 条件状语从句中，主句用一般将来时，从句用 一__般__现__在__时___表示将来。遵从主_将__从__现____原则。
We will go to the park if it _d_o_e_s_n_’_t __r_a_i_n_ (not rain) tomorrow.

专项语法讲练——if条件状语从句及其时态的用法【概念引入】英国前首相撒切尔夫人（Margaret Thatcher）曾用if条件句对男人和女人进行评价：In politics, if you want someone to make a speech, ask a man; if you want something done, ask a woman.在政治领域，如果你想要有人发表演说，那就找男士去；而如果你想真正把事情解决，那就找女士。

【用法讲解】一、概念连词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。

例如：We’ll go to the Great Wall if it doesn’t rain tomorrow. = If it doesn’t rain tomorrow, we’ll go to the Great Wall. 如果明天不下雨，我们就去长城。

二、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或will。

例如：If I’m free tomorrow, I’ll go with you. 如果我明天有空，我将会和你一起去。

2. if引导的条件状语从句，主句用一般将来时，从句则用一般现在时，即“主将从现”。

例如：If it is sunny tomorrow, I’ll climb the hill. 如果明天天气晴朗，我将去爬山。

3. 正确区分if引导的条件状语从句和if引导的宾语从句。

在条件状语从句中，if表示“如果”；而在宾语从句中，if表示“是否”。

可以用下面的方法区分：1) 从句前置法：if引导的条件状语从句，可以放在主句之前并用逗号隔开，也可放在主句之后；而if引导的宾语从句只能放在主句之后。

八年级英语条件状语从句练习题40题(带答案)1.If it rains tomorrow, we _____ stay at home.A.willB.wouldC.shouldD.must答案解析：A。

if 引导的条件状语从句，遵循“主将从现”原则，主句用一般将来时，所以选A。

B 选项would 用于过去将来时或表示委婉语气；C 选项should 表示应该；D 选项must 表示必须，都不符合条件状语从句的语法规则。

2.She will go to the park if she _____ free.A.isB.will beC.wasD.would be答案解析：A。

同样遵循“主将从现”原则，从句用一般现在时，she 是第三人称单数，所以用is。

B 选项will be 是将来时；C 选项was 是过去时；D 选项would be 是过去将来时，都不正确。

3.If you study hard, you _____ good grades.A.getB.will getC.gotD.would get答案解析：B。

“主将从现”，主句用一般将来时，选will get。

A 选项get 是一般现在时；C 选项got 是过去时；D 选项would get 是过去将来时，不符合语法规则。

4.We will have a picnic if the weather _____ fine.A.isB.will beC.wasD.would be答案解析：A。

“主将从现”，从句用一般现在时，weather 是不可数名词，用is。

B 选项will be 是将来时；C 选项was 是过去时；D 选项would be 是过去将来时，都不合适。

5.If he _____ time, he will come to see us.A.hasB.will haveC.hadD.would have答案解析：A。

“主将从现”，从句用一般现在时，he 是第三人称单数，用has。

William’s problems
2. I was away from school today, I do not know what homework to do.
If you call your friends, they will tell you what homework to do.
It is going to rain tomorrow. I will stay in bed.
it rains in bed.
I will stay
I will stay in bed it rains
→主句谓语中也可以含有情态动词，
如：
等
例句：如果交通指示灯是红的，你必须停下来等一等。
If the traffic lights red, you must stop and wait.
I’ll help you with your English if I am free tomorrow. 如果明天我有空，我会帮你学英语。
2. 在if引导的条件状语从句中不能够使用some， 而要用any。 If you have any questions to ask, please come to my office. 如果你有问题要问的话，请 到我办公室来。
Give some advice！！！
2
William’s problems
1. I sometimes bring the wrong books to school.
If you check your timetable every night， you will know which books to bring.

How to make him not feel cold

班级姓名学号分数Unit 10 If you go to the party.if引导的条件状语从句（时间：60分钟，满分：100分）一、单项选择(本大题共50小题，每小题2分，共100分)1．________ I’m free tomorrow, I will help you tidy your room.A．So B．Though C．If2．We will go camping if it ________ tomorrow.A．won’t rain B．isn’t raining C．doesn’t rain D．didn’t rain 3．—Would you like to go fishing with me this Sunday?—If it ________, I will go.A．doesn’t rain B．rains C．won’t rain D．will rain4．If she ________ to Shanghai next month, I will go with her.A．go B．goes C．is going5．If I ________ to go abroad, I’ll go to Britain.A．allow B．am allowed C．was allowed D．will allow6．The concert comes after school. If Jenny ________, I will go, too.A．is going B．goes C．went D．will go7．If the weather ________ fine, we ________ have a sports meeting this weekend.A．is; will B．will be; will C．was; willA．because B．unless C．if9．We can go to see Battle at Lake Changjin ________ you want to see a movie this weekend.A．and B．if C．but D．so10．_________ you like the Beijing Opera, traditional music or magic shows, you can enjoy them there.A．If B．Before C．So D．When11．I don’t know if I ________ free tomorrow. If I ________ free, I will go to the bookstore.A．am; am B．will be; will be C．will be; am D．am; will be12．If the temperature ________ below zero degree, water ________ into ice.A．drops; turns B．will drop; turnsC．drops; will turns D．will drop; will turn13．—Labor (劳动) education is important to students’ development.—I agree. ________ students can often help with housework, it will be good for them.A．Unless B．Though C．Until D．If14．—Mom, I want to watch the program I Am a Singer IV now.—You can watch it ________ you finish your homework.A．if B．unless C．but D．so that 15．—Could you help me do some cleaning tomorrow?—If I ________ free, I will do.A．am B．will be C．was D．were16．________ you look after this coat carefully, it will keep you warm through many winters.A．If B．Unless C．Before D．So17．I would like to read my favourite book ________ I’m free this weekend.A．if B．before C．until D．though18．If it ________ tomorrow, we will go on a picnic by the lake.A．isn’t raining B．won’t rain C．rained D．doesn’t rain19．If you ________ too much time online, it will hurt your eyes badly.A．spend B．spent C．will spend D．are spending 20．Boys and girls, believe in yourself. If you ________ hard, your dream will come true.A．will study B．studied C．study D．are studying 21．—Happiness is about having each tiny wish come true.—________ we work hard, we’ll make our life full of happiness.A．If B．Unless C．Though22．—I hear Jackie Chan will come to Wuxi next week.—Really? ________ he ________, my sister will be very happy.A．If; comes B．If; will come C．Before; come D．Till; comes23．The students will make fewer mistakes ________ teachers have the punishment power (惩戒权).A．if B．but C．though D．unless24．Our primary school has changed a lot. If you go there, you _________ the changes.A．find B．found C．will find D．have found25．If your brother ________ to the party, he ________ a good time.A．goes; has B．will go; will have C．goes; will have26．We should take the rest of the food home __________ we can’t eat up what we ordered.A．if B．though C．so D．yet27．—If it ________ tomorrow, we will go camping together.—Sounds great!A．won’t rain B．doesn’t rain C．isn’t sunny 28．—You will get two free concert tickets ________ you win this singing competition.—That sounds great!A．unless B．since C．until D．if29．— If I ________ tomorrow, I will pay a visit to Fuzhou Forest Park.— That’s a good idea!A．has time B．will have time C．have time30．If people ________ the traffic rules, there will be fewer accidents.A．will obey B．obeys C．obey31．If you take this bus, you ________ in Beijing tomorrow.A．arrives B．arrive C．arrived D．will arrive 32．If Jack still ________ the flu tomorrow, he ________ to work.A．has; won’t go B．has; doesn’t go C．will have; won’t go 33．Gina ________ to hang out with her friend if she is not available this weekend.A．refuse B．refuses C．refused D．will refuse 34．There ________ 29 days in February if it ________ a leap year (闰年).A．will be, is B．will be, will be C．are, will be D．are, is 35．—Come on, Susan. I’m sure you will catch up with the others ______ you work harder.—Thank you, Miss Green.A．before B．until C．if D．so36．We can have a talk _______ you have time.A．so B．if C．or D．though 37．It will be hard for him to get up early in the morning if he ________ to bed too late.A．go B．goes C．will go D．are going 38．—Jim will bring some friends from other schools to the party.—If he ______, the teachers will ask them to leave.A．is B．does C．has D．will39．If each of us ________ something for the environment, all of us will have a better life.A．will do B．does C．is doing D．do40．If I ________ a holiday next year, I ________ part in a summer camp in Beijing.A．took; will take B．take; will take C．will take; take D．will take; took 41．— I want to know if Maria ________ us in the fashion show tonight.— I believe if she ________ her homework, she will join us.A．joins; finishes B．will join; finishes C．joins; will finish D．will join; will finish 42．Mom won’t be happy if she _________ this mess.A．sees B．saw C．will see D．has seen43．I’ll go to the meeting if it ________ by 5:00 p.m.A．ended B．will end C．end D．ends44．If it ________ sunny, we will go for a picnic in the park next Sunday.A．is B．was C．will be D．has been45．________ you don’t understand, ask your teacher.A．If B．Unless C．Because D．For46．You ________ if you do one thing at a time and stick to your plan.A．succeed B．succeeded C．will succeed D．have succeeded 47．________ the mobile phone rings during an interview, you should turn it off at once.A．Although B．Since C．If D．Before48．________ you look after it carefully, this coat will keep you warm through many winters.A．If B．Unless C．Before D．Once49．I think you’ll be late ________ you take a bus to the party.A．or B．if C．and D．but50．—What will happen ________ we hold the party next Monday evening?—Most of our classmates will not come.A．though B．if C．unless参考答案：1．C【详解】句意：如果明天我有空，我将帮你整理你的房间。

语法专题：条件状语从句（1）if条件句：有可能性结果发生的行动，在这些句子中，动词的时态是不同的，if 引导的条件状语从句中，主句用一般将来时态，从句用一般现在时态（主将从现）If it doesn’t rain（从句）, we’ll have a picnic tomorrow（主句）.We’ll have a picnic tomorrow, if it doesn’t rain.（if引导的从句可置前可置后）（2）主祈从现（祈使句+if+一般现在时态）Put up your hands if you have any questions to ask. 如果你们有问题问的话，请举手。

当主语是you时，if 引导的条件状语从句可以与”祈使句+and/ or +简单句”进行句型转换。

And 表示句意顺承，or 表示转折，意为”否则”。

Take care , or you will fall off the tree. = If you don’t take care, you’ll fall off the tree. 小心，否则你会从树上掉下来。

（3）主情从现（情态动词+if +一般现在时态）If I get there early, I can see the doctor quickly.（4）句型：will do式be going to do式肯定从句If主语+动词+其他, 主语+will(won’t) do+其他. If主语+动词+其他, 主语+be(be not) going to do+其他.否定从句If主语+be+not+其他, 主语+will(won’t) do+其他. If主语+be+not+其他, 主语+be(be not) going to do+其他.If主语+don't/ doesn't +动词原形+其他, 主语+will(won’t) do+其他. If主语+don't/ doesn't +动词原形+其他, 主语+be(be not) going to do+其他.If the picture is silly, strange and colourful, you will remember it better.If I have time, I am going to visite you .I will go to the park if it doesn’t rain tomorrow . I won't go to the park if it rains tomorrow.专题精讲实战演练题型1：单项选择( ) 1. If the robot ___________ wrong，you can get a new one for free or get all your money back.A. wentB. goesC. would goD. will go ( ) 2. —We’ll go for a picnic if it ___________ on Sunday.—Wish you a lovely weekend.A. rainB. doesn’t rainC. won’t rainD. rains ( ) 3. I’ll do it better if the teacher ___________ me another chance.A. giveB. givesC. gaveD. will give( ) 4. If a polar bear ___________, it ___________ fish from the waterA. will be hungry；catchesB. is hungry；will catchB. is going to be hungry；catches D. is hungry；won’t catch( ) 5. If our government ___________ attention to controlling food safety now, our health ___________ in danger.A. won’t pay; isB. doesn’t pay; isC. won’t pay; will beD. doesn’t pay; will be( ) 6. We will go for a picnic if it___________ tomorrow.A. doesn’t rainB. wasn’t rainyC. won’t rainD. wasn’t raining( ) 7. If the pure water is heated to 100 centigrade degrees, it___________ boil.A. is going toB. willC. wouldD. is to ( ) 8. She will go to America___________ she has much free time and money.A. as long asB. butC. thoughD. although( ) 9. We will go to the West Lake___________ it doesn’t rain heavily tomorrow.A. ifB. unlessC. as long asD. once ( ) 10. I won’t call you, ___________ something unexpected happens.A. unlessB. whetherC. becauseD. While Keys: 1-5 BBBBD 6-10ABAAA题型2：以所给词的正确形式填空1. If he ________ (study) hard, he will get good grades.2. Everyone must wear uniforms. If you don't, they ___________ (let) you in.3. If you stand at the top of the mountain, you _________ (see) the view of the whole city.4. My grandfather will wear a pair of glasses if he__________ (read) newspapers.5. Please turn off the light if you ________ (leave) the classroom.6. We’ll go for a picnic unless it ________(rain) this Sunday.7. Mr Smith ________ (let) you know if he needs help.8. If you walk along the street, you ________ (see) many foreigners.9. If Mary ________ (ask) me for help，I will try my best to help her.10. I don't know if it will snow tomorrow. If it_______ (snow)，we'll make snowmen. Keys:1. Studies 2.won’t let 3. will see 4. reads 5.leave6.doesn’t rain7.will let8.will see9. asks 10.snows直击中考题型1：单项选择( ) 1.—I wonder if your wife ________ to the party.—If your wife _________, so will mine.A. will go, goB. will go, goesC. goes, will goD. will go, will go ( ) 2. If he _________ in half an hour, we _________ wait for him.A. won't come, won'tB. won't come, don'tC. doesn't come, won'tD. will come, don't ( ) 3. I will send you an e-mail as soon as I_________ in Canada.A. arriveB. arrivedC. am arrivingD. will arrive( ) 4. 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 ( ) 5. You can’t watch TV ________ you finish your homework.A. beforeB. ifC. whileD. asKeys:1-5:ACAAA。

——————————新学期新成绩新目标新方向——————————if 引导的条件状语从句（作业）一、单项选择( )1. If you to the party, you’ll have a great time.A. will goB. wentC. goD. going( )2. I her the answer if she me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell,asks( )3. —What areyou going to do tomorrow?—We’ll go to the library tomorrow if it .A. isn’t rainB. rainC. won’t rainD. doesn’t rain( )4. —Do you know when he will come back tomorrow?—Sorry, I don’t know. When he back, I’ll tell you.A. comesB. will comeC. comeD. may come( )5. What will you do if you to the old folk’s home visit?A. goB. wentC. goingD. will go( )6. I you up when he back.A. will wake; comeB. will wake; comesC. wake; comesD. wake; will come二、用所给词的适当形式填空7.If there(be) fewer trees, there ( be) more pollution.8.If Marcia (live) alone, she( keep) a pet dog.na (buy) a new dress if the old one(be) out of style.10.If Mr. Green (say) I am hard- working, myparents _ ( feel) glad.11.I(go) to the beach if it( not rain) thisweek.12.He (write) a letter to his grandparents if he(get) his report card this week.13.If she _ (get) up late, she( not catch) the early bus.三、根据汉语意思完成句子14.如果努力学习，你就会取得好成绩。

2022-2023学年八年级英语上册单元模块满分必刷题（人教版）Unit 10【刷语法】(重点语法提升练)If引导的条件状语从句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’t 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.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.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 you 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。

第10讲if 引导条件状语从句1、知晓条件状语从句结构及用法。

2、熟练掌握if引导状语从句的同义转换。

【拓展】if /when 引导状语从句和宾语从句这两种从句。

从句的时态的确定。

A．If B．And C．Be D．Or【答案】A【详解】句意：如果你不快点，你将错过公共汽车。

考查连词辨析。

if如果；and和；be是；or否则。

“you don’t hurry up”是错过公共汽车的条件，用if引导条件状语从句。

故选A。

考点2：if引导条件状语从句时态的确定1．—Would you like to go fishing with me this Sunday?—If it ________, I will go.A．doesn’t rain B．rains C．won’t rain D．didn’t rain【答案】A【详解】句意：——这个星期天你愿意和我一起去钓鱼吗？——如果不下雨，我就去。

考查时态。

if引导的条件状语从句，从句中用一般将来时，主句中用一般现在时，根据“If it..., I will go.”可知，此处表达“不下雨”。

故选A。

2．—What are you going to do this weekend?—We’ll go to have a picnic if it ________.A．rains B．is raining C．doesn’t rain D．won’t rain【答案】C【详解】句意：——这个周末你打算做什么？——如果不下雨，我们将去野餐。

考查条件状语从句。

rains第三人称单数形式；is raining现在进行时；doesn’t rain不下雨，一般现在时态；won’t rain一般将来时。

if引导的条件状语从句，主句一般将来时态，从句一般现在时态。

选项B、D不正确。

根据“We’ll go to have a picnic”可知，从句应该是“如果不下雨”，用否定形式doesn’t rain。

**********精心制作仅供参照鼎尚出品*********if 指引的条件状语从句（作业）一、单项选择()1. If you to the party, you’ ll have a great time.A. will goB. wentC. goD. going()2. I her the answer if she me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks()3. —What are you going to do tomorrow?— We’ llgo to the library tomorrow if it.A. isn ’t rainB. rainC. won’t rainD. doesn ’t rain()4. — Do you know when he will come back tomorrow?— Sorry,I don ’knowt. When he back, I’ ll tellyou.A. comesB. will comeC. comeD. may come()5. What will you do if you to the old folk’homes visit?A. goB. wentC. goingD. will go ()6. I you up when he back.A. will wake; comeB. will wake; comesC. wake; comesD. wake; will come二、用所给词的适合形式填空7.If there(be) fewer trees,there( be)more pollution.8.If Marcia(live)alone, she( keep) a pet dog.na(buy) a new dress if the old one(be) out of style.10.If Mr. Green(say)I am hard-working,myparents_ ( feel) glad.11.I(go) to the beach if it( not rain) this week.12.He(write) a letter to his grandparents if he(get) his report card this week.13.If she_ (get) up late, she( not catch) the early bus.**********精心制作仅供参照鼎尚出品*********三、依据汉语意思达成句子14.假如努力学习，你就会获得好成绩。

参考答案
1．B
【详解】
句意：从现在起，除非你每天练习，否则你的英语口语是不可能提高的。
考查连词辨析。if如果；unless除非，如果不；although尽管；until直到。根据“You can’t improve your spoken English ... you practice it every day from now on.”可知，提高英语口语的前提条件是从现在开始，每天练习，用“unless”引导的条件状语从句。故选B。
A．adviceB．decisionsC．informationD．messages
9．— Who __________ went to the park?
— Tom and Linda.
A．elseB．otherC．anotherD．the other
10．After trying many times, we were successful __________.
A．ifB．whileC．unlessD．until
3．You should get up earlier ________ you want to catch the early bus.
A．thoughB．beforeC．ifD．unless
4．We’ll go hiking if it ________ tomorrow.
17．
根据“Please call her and tell her we will have it later.”可推断，选项D“Jackson女士同意来英语派对”符合语境，故选D。
18．
根据“Let’s have it tomorrow evening”可推断，此处应是询问“什么时候举办英语派对”。选项A“什么时候是举办派对的好时间”符合语境，故选A。