初中英语外研版 (新标准)九年级上册Module 1 Wonders of the worldUnit 3 Language in use优秀课时训练

Module 6 Problems

Unit 3 语法专项- if条件状语从句

1. 什么是if条件状语从句（概念梳理）

一个句子做整句话的状语，这个句子就叫做状语从句。根据状语从句在整句中表示的含义不同又可细分为时间状语从句、地点状语从句、原因状语从句、结果状语从句、目的状语从句、让步状语从句、条件状语从句等。外研版英语九年级上册Module2、3、4已经系统复习了时间状语从句，原因、结果和目的状语从句，让步状语从句。Module 5、6学习条件状语从句。

条件状语从句就是在复合句中表示主句动作发生的条件的一种状语从句。和大多数状语从句一样，掌握条件状语从句最重要的依然是掌握连词。条件状语从句的常用连词有：if, unless（除非）, as long as（只要）, only if（只有）, in case that, on condition that等。初中阶段要求必须掌握的是if引导的条件状语从句。

if是引导条件状语从句最常用的连词，意为“如果”。

     从句            主句

If you study hard, you will pass the exam.

如果你努力学习，你就会通过这个考试。

主句动作：you will pass the exam

前提条件：you study hard （完整句子做状语，表示主句动作发生的条件，这个句子就是条件状语从句）

然后还需要用if这个连词来引导这个条件状语从句。

所以，if条件状语从句就是if引导的状语从句在复合句中作条件状语。

2. if条件状语从句的位置

if引导的条件状语从句既可以放在主句之前，也可以放在主句之后。if从句在主句前时常用逗号隔开，在主句后通常不用逗号隔开。

        Make sure you visit the Science Museum if you ever go to London.

如果你去伦敦，一定要确保去参观科学博物馆。

3. if条件状语从句的用法和时态

（1）“if条件状语从句+祈使句”这种结构可用来表达建议或意见。此时主句是祈使句（动词原形开头），if条件状语从句用一般现在时，即“主祈从现”。

        If you don’t feel well, go to see the doctor please. 如果你感觉不舒服，就去看医生。

（2）if条件状语从句可以表示在某种条件下，某事很可能会发生。此时主句通常用一般将来时，从句用一般现在时表将来，即“主将从现”。

        If I start after dinner, I’ll finish it before I go to bed. 如果饭后做作业，我睡觉前就能完成。

(2021·重庆市市辖区·月考试卷)If it _______ tomorrow, we will go to the park.

A. isnˈt rain B. donˈt rain C. doesnˈt rain D. wonˈt rain

（3）主句含有情态动词can, may, must, should等，从句用一般现在时表将来，即“主情从现”。

        She may come with us if she arrives in time.

如果她及时到了，她可能会和我们一起去。

（4）【拓展】如果if条件状语从句不是表达将来会发生的事情，则不需要用一般现在时表将来。主句和从句的时态均按照动作发生的实际情况采用不同时态。

        If you are looking for a perfect present, this is the right place for you.

如果你正在寻找一件完美礼物，这就是你要来的地方。

（5）【拓展】if引导的条件状语从句还可以表示一种虚拟的条件或假设，即从句表示的条件是不会实现或根本不可能成立的，是一种“虚拟语气”。此时从句用一般过去时（如果是be动词，一律用were），主句可用过去将来时。高中阶段会学习更多if条件从句虚拟语气的情况。

        If I were you, I wouldn’t do it like that. （“我是你”这个条件是不可能实现的）

如果我是你，我是不会那么做的。

4. 【拓展】if还可以引导宾语从句，意为“是否”，常和 “whether”互换。

if 引导宾语从句时的时态问题遵循普通宾语从句的时态原则。

（宾语从句的时态三原则）

I don’t know if he will come tomorrow. 我不知道他明天是否会来。

I wonder whether/if you can help me. 我想知道你能否帮我。

【注意】下列情况只能用 whether:

①在动词不定式前只能用whether。I can’t decide whether to stay.

②后有or not 时只能用whether。I want to know whether it’s true or not.

③在介词后，只能用whether。His father is worried about whether he will lose his work.

④宾语从句放在句首表示强调时，只能用whether。Whether this is true or not, I really don’t know.

⑤用if发生歧义时，只用whether。Could you tell me whether you know the answer?

【易考易错点】if(是否)引导宾语从句&if(如果)引导条件状语从句的时态问题

(2022·贵州省铜仁市·模拟题)I want to know if he ______ tomorrow, if he ______, please call me in time.

A. will come; comes B. comes; will come
C. comes; comes D. will come; will come

语法专练-if条件状语从句

（50道语法单项选择题）

题组A  基础过关练

1. I don't know if it ________ tomorrow. If it ________, I won't go.

A. will rain; will rain B. rains; rains

C. rains; will rain D. will rain; rains

2.  I will go fishing if the weather _______fine this Saturday and Sunday.

A.     will be B. is going to be C. is D. are

3. —I wonder if our foreign teacher Mr. White ______to his hometown next Tuesday.

—I'm not sure. But if he returns to his hometown, I'll ______ him off.

A. return; see B. will return; see

C. will return; will see D. returned; see

4. —Will Jim come back tomorrow？

—Sorry, I don't know. If he_____back, I'll tell you.

A. comes B. will come C. come D. came

5.  ______ he keeps eating well and staying active, heˈll lose more weight and have a healthy body.

A. As B. If C. For D. Though

6. You ________ sleepy and tired if you go to bed late at night.

A. feel B. will feel C. feeling D. are feeling

7. If it __________ tomorrow, we ___________ on a trip.

A. is rain; go B. is rainy; are go

C. isn't rainy; will go D. isn't rain; will go

8. I don't know if he _______. If he ______, I will let you know as soon as possible.

A. comes; comes B. will come; comes

C. will come; will come D. comes; will come

9. —Would you like to go hiking if it _________ fine this Saturday?

—Iˈd love to. But nobody knows if it _________.

A. is; will rain B. is; rains
C. will be; will rain D. will be; rains

10. —I wonder if Sally           us prepare for the party.

—I′m sure she will if she          time.

A. helps, will have B. will help, has

C. will help, will have D. helps; has

11. —You won't pass the exam    you don't work hard．

—OK，I'll do my best．

A. and B. but C. if D. so

12. Our school basketball team will win the next match ______ they practise more.

A. if B. before C. though D. while

13.  ______ you smile at others, they will smile back.

A. If B. So C. Or D. Though

14. Cooking is an interesting lesson and we can make different dishes           ​​​​​​​ we like.

A. if B. after C. though D. so

15. If it doesn't rain tomorrow, we_________ a picnic.

A. will have B. had C. have had D. was having

16. —If the traffic ______ busy, Linda won' t catch the train in one hour.

—I know I will call her to leave for the train station at once.

A. is B. will be C. was D. has been

17.  We will play football if it ______ this Saturday.

A. doesn't snow B. won't snow C. isn't snowing D. didn't snow

18.  Studying in groups is necessary ________ you want to do well in school.

A. if B. until C. unless D. though

19. —Letˈs have a picnic if it ________ this Sunday．

—But nobody knows if it ________ on that day．

A. will be fine；will rain B. will be fine；rains

C. is fine；will rain D. is fine；rains

20.  If you ______ able to come, I will show you around my hometown.

A. is B. can be C. will be D. are

21.  If I ______ a two-week holiday next year, I will take part in a short study tour to Beijing University.

A. took B. take C. will take D. are taking

22. We will have a picnic ________ it doesn't rain tomorrow.

A. because B. so C. and D. if

23.  I'll go out for a walk after supper if it       rain.

A. didn't B. won't C. isn't D. doesn't

24.  If it ______ sunny tomorrow，we will have a picnic near the river．

A. will be B. be C. is D. was

25.  _____ we continue to kill elephants for their ivory，we humans will lose them in the end．

A. If B. Before C. Until D. Although

26.  Johnson won't answer the phone if he ________ the number.

A. knew B. doesn't know C. will know D. didn't know

27.  If Nancy _________ the exam, she will go to Australia for English study.

A. pass B. passed C. passes D. will pass

28.  You’ll be late __________ you don’t get up now.

A. if B. before C. until D. after

29.  I don’t know ________he will come tomorrow.                  he comes，I'll tell you.

A. if; Whether B. whether；Whether

C. if; That D. if; If

30. If there _______ rain tomorrow, we won’t ______on time.

A. will be; get to B. is; reach C. will be; arrive D. is; arrive

题组B  能力提升练

31. —I'm worried about if the math teacher ______ me with my problem.
    —Of course she will if you ______ and ask for help.

A. helps; will go B. help; go

C. will help; go D. will help; will go

32. Please call me back if you ________ free tomorrow.

A. are B. will be C. is D. is going to be

33.  Why not look up the new word in a dictionary ______ you don’t know it?

A. if B. that C. though D. whether

34.  —Do you know if he________ to play football with us?

—I think he will come if he _________ free tomorrow.

A. comes; is B. comes; will be

C. will come; is D. will come; will be

35. —I don’t think I can go hiking tomorrow. —If you_____go, ______I.

A. don’t, neither do B. won’t , neither will

C. don’t ,so will D. don’t , neither will

36. —Would you like to go to the movies with me？

—I'd like to. I'll go ________ I finish my homework on time.

A. and B. so C. but D. if

37. —Do you know if he will come tomorrow?

—No. But if he ________, he will call you to have a meal together.

A. will come B. wonˈt come C. comes D. doesnˈt come

38. —Tom, do you know if Sam ______ to my party next week?

— I think she will come if she ______ free.

A. come; will be B. will come; is

C. comes; is D. will come; will be

39. I ______ you a phone call if I hear anything.

A. will give B. gave C. have given D. give

40.  If it is sunny tomorrow, my parents ______ me to the park.

A. take B. took C. will take D. have taken

41. You will feel cold ______ you don't wear a coat.

A. so B. though C. if D. unless

42. —I hear Jack 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; comes

43. I will go camping if it ______ this weekend.

A. won't rain B. isn't raining C. don't rain D. doesn't rain

44.  If everyone ________ the traffic rules, there will be fewer accidents on the road.

A. follows B. follow C. breaks D. break

45. —If you try hard, your dream will         .

—Yes, I          .

A. come true; will B. be truly; will C. come true; do D. be true; do

46. If you study hard, you____great progress.

A. will make a B. make a C. will make D. make

47. If there is a bike, we ________ get there on time.

A. will able to B. will be able to C. can be able to D. can able to

48. —Will you go to the movies with me tonight?

—I will go with you if I ______ much homework.

A. have B. don't have C. will have D. won't have

49. I donˈt know ______ or not she studies hard. ______ she does, she will get good marks.

A. if; If B. whether; Whether

C. whether; If D. if; Whether

50. —Would you go for a picnic with us this Sunday ?

—If Mary doesn’t go , ______ .

A. so do I B. so will I C. neither do I D. neither will I