摘要：答案：B。解析：第一个if引导宾语从句，由tomorrow可知用一般将来时will rain；第二个if引导条件状语从句，遵循“主将从现”原则，用rains。

50道中考英语条件状语从句选择题及参考答案解析：

题目

1. I don't know if it ___ tomorrow. If it ___, we won't go on a picnic.

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

2. We can't go to the zoo ___ the weather is fine tomorrow.

A. unless B. if C. because

3. Just work hard, ____ your dream will come true.

A. but B. and C. or

4. Don't cross the street ____ the traffic lights are green.

A. after B. until C. when

5. ____ they may not succeed, they will try their best.

A. Though B. Because C. Unless

6. We will have no water to drink ___ we don't protect the earth.

A. until B. before C. if

7. You'll do better ___ you are more careful with your spelling.

A. if B. before C. although

8. The sports meeting will continue ___ it rains this afternoon.

A. if B. since C. unless

9. I'll give her the message ___ she comes back.

A. till B. before C. as soon as

10. Jim is going to be a doctor when he ____.

A. will grow up B. grows up C. grow up

11. ____ you go to the party, you will have a good time.

A. If B. Though C. Because

12. There are ___ many books on math in the bookshop that he can't decide which to choose.

A. so B. too C. such

13. He got up early ___ he could get to school on time.

A. even though B. as if C. so that

14. She is ___ short ___ she can't reach the buttons of the lift.

A. so; that B. such; that C. too; to

15. All of us haven't seen Mike ___ he left our city.

A. when B. until C. since

16. ___ they are poor, yet they are very honest.

A. Because B. Although C. When

17. Why do you want a new job ___ you got such a good one already?

A. that B. where C. when

18. You will be late ___ you leave immediately.

A. unless B. until C. if

19. We won't give up ___ we may fail ten times.

A. even if B. since C. whether

20. The new secretary is supposed to report to the manager as soon as she ___.

A. will arrive B. arrives C. is arriving

21. The volleyball match will be put off if it ___.

A. will rain B. rains C. rained

22. It rained ___ heavily that they didn't come.

A. as B. too C. so

23. I often visited Tian'anmen Square ___ I was staying in Beijing.

A. until B. during C. while

24. What will you buy if you ___ a lot of money?

A. have B. had C. will have

25. If it doesn't ___ tomorrow, we will feel unhappy.

A. snow B. snows C. snowing

26. You will hurt your teeth if you ___ too much chocolate.

A. eat B. eats C. will eat

27. Please show me the way if you ___ it.

A. know B. knows C. will know

28. They ___ the game unless they try their best.

A. will lose B. lose C. lost

29. If I see him again, I ___ him what you said.

A. will tell B. tell C. told

30. What ___ if they don't agree with each other?

A. will happen B. happen C. happened

31. I don't know if Tom ___ to the meeting tomorrow. If he ___, so will I.

A. goes; goes B. will go; will go C. will go; goes

32. Mrs. Green will take her son to the amusement park if she ___ the tickets.

A. got B. gets C. is getting

33. You need to practice speaking every day ___ you hope to improve your spoken English.

A. if B. although C. unless

34. I'd like to ___ I finish my homework.

A. before B. though C. if

35. Get up early, or you'll be late for the meeting. (同义句转换)

___ you ___ get up early, you'll be late for the meeting.

A. If; don't B. Unless; don't C. If; do

36. If you work hard, you'll be a top student in class. (同义句转换)

Work hard, ___ you'll be a top student in class.

A. and B. or C. but

37. I can't finish the work without your help. (同义句转换)

I can't finish the work ___ you ___ help me.

A. if; don't B. unless; don't C. if; do

38. If you don't get up early, you'll be late. (同义句转换)

___ you ___ up early, you'll be late.

A. Unless; get B. If; don't get C. Unless; don't get

39. ___ you have a trip during the summer holiday, you will want to share some photos on WeChat.

A. If B. Although C. Unless

40. ___ it is often cold in the mountains, you need to wear warm clothes.

A. If B. Because C. When

41. You will see many aunts dancing together on the square if it ___ in the evening.

A. doesn't rain B. won't rain C. didn't rain

42. The rivers will become dirtier and dirtier ___ we take action to protect them.

A. if B. unless C. when

43. You can use English or Chinese ___ you travel in Singapore.

A. if B. whether C. whatever

44. ___ you may have, you should gather your courage to face the challenge.

A. However a serious problem B. What a serious problem C. However serious a problem

45. Leave your key with a neighbor ___ you lock yourself out one day.

A. ever since B. even if C. in case

46. ___ our manager objects to Tom's joining the club, we shall accept him as a member.

A. Until B. Unless C. If

47. Many of them turned a deaf ear to his advice, ___ they knew it to be valuable.

A. as if B. now that C. even though

48. My parents live in a small village. They always keep candles in the house ___ there is a power out.

A. if B. unless C. in case

49. We had to wait half an hour ___ we had already booked a table.

A. since B. although C. until

50. I don't mind where we go ___ there's sun, sea and beach.

A. as if B. as long as C. now that

答案及解析

1. 答案：B。解析：第一个if引导宾语从句，由tomorrow可知用一般将来时will rain；第二个if引导条件状语从句，遵循“主将从现”原则，用rains。

2. 答案：A。解析：unless意为“除非”，相当于if not，句意为“除非明天天气好，否则我们不能去动物园”。

3. 答案：B。解析：“祈使句+and+陈述句”，表示如果做到了祈使句的内容，就会有后面的结果。

4. 答案：B。解析：not...until意为“直到……才”，句意为“直到交通灯变绿才能过马路”。

5. 答案：A。解析：though引导让步状语从句，意为“尽管”，句意为“尽管他们可能不会成功，但他们会尽力”。

6. 答案：C。解析：if引导条件状语从句，“如果我们不保护地球，我们将没有水喝”。

7. 答案：A。解析：if引导条件状语从句，“如果你在拼写方面更细心，你会做得更好”。

8. 答案：C。解析：unless意为“除非”，“除非今天下午下雨，否则运动会将继续”。

9. 答案：C。解析：as soon as引导时间状语从句，“她一回来我就把消息给她”。

10. 答案：B。解析：when引导时间状语从句，从句用一般现在时表示将来，主语是he，用grows up。

11. 答案：A。解析：if引导条件状语从句，“如果你去参加派对，你会玩得很开心”。

12. 答案：A。解析：so...that...意为“如此……以至于……”，so修饰many。

13. 答案：C。解析：so that引导目的状语从句，“他早起以便能按时到校”。

14. 答案：A。解析：so...that...引导结果状语从句，“她如此矮以至于够不到电梯的按钮”。

15. 答案：C。解析：since引导时间状语从句，“自从迈克离开我们的城市，我们都没见过他”。

16. 答案：B。解析：although引导让步状语从句，“尽管他们很穷，但他们很诚实”。

17. 答案：C。解析：when在这里可理解为“既然”，表示一种让步或转折的关系。

18. 答案：A。解析：unless意为“除非”，“除非你马上离开，否则你会迟到”。

19. 答案：A。解析：even if引导让步状语从句，“即使我们可能失败十次，我们也不会放弃”。

20. 答案：B。解析：as soon as引导时间状语从句，从句用一般现在时表示将来，主语是she，用arrives。

21. 答案：B。解析：if引导条件状语从句，遵循“主将从现”原则，用rains。

22. 答案：C。解析：so...that...引导结果状语从句，“雨下得如此大以至于他们没来”。

23. 答案：C。解析：while引导时间状语从句，强调主句和从句的动作同时发生，“当我在北京时，我经常去天安门广场”。

24. 答案：A。解析：if引导条件状语从句，用一般现在时have。

25. 答案：A。解析：doesn't后接动词原形snow。

26. 答案：A。解析：if引导条件状语从句，用一般现在时eat。

27. 答案：A。解析：if引导条件状语从句，用一般现在时know。

28. 答案：A。解析：unless引导条件状语从句，遵循“主将从现”原则，用will lose。

29. 答案：A。解析：if引导条件状语从句，遵循“主将从现”原则，用will tell。

30. 答案：A。解析：if引导条件状语从句，遵循“主将从现”原则，用will happen。

31. 答案：C。解析：第一个if引导宾语从句，由tomorrow可知用一般将来时will go；第二个if引导条件状语从句，遵循“主将从现”原则，用goes。

32. 答案：B。解析：if引导条件状语从句，遵循“主将从现”原则，用gets。

33. 答案：A。解析：if引导条件状语从句，“如果你希望提高英语口语，你需要每天练习说”。

34. 答案：C。解析：if表示“如果”，引导条件状语从句。

35. 答案：A。解析：原句可转换为If you don't get up early, you'll be late for the meeting.。

36. 答案：A。解析：“祈使句+and+陈述句”，相当于if引导的条件状语从句。

37. 答案：A。解析：原句可转换为I can't finish the work if you don't help me.。

38. 答案：A。解析：if not可转换为unless，“除非你早起，否则你会迟到”。

39. 答案：A。解析：if引导条件状语从句，“如果你在暑假去旅行，你会想在微信上分享一些照片”。

40. 答案：B。解析：because引导原因状语从句，“因为山里经常很冷，所以你需要穿暖和的衣服”。

41. 答案：A。解析：if引导条件状语从句，遵循“主将从现”原则，用doesn't rain。

42. 答案：B。解析：unless意为“除非”，“除非我们采取行动保护河流，否则它们会变得越来越脏”。

43. 答案：A。解析：if引导条件状语从句，“如果你在新加坡旅行，你可以用英语或汉语”。

44. 答案：C。解析：however引导让步状语从句，结构为“however+形容词/副词+主语+谓语”。

45. 答案：C。解析：in case意为“以防万一”，引导目的状语从句。

46. 答案：B。解析：unless意为“除非”，“除非我们的经理反对汤姆加入俱乐部，否则我们将接受他为会员”。

47. 答案：C。解析：even though引导让步状语从句，“尽管他们知道他的建议很有价值，但很多人还是不听”。

48. 答案：C。解析：in case意为“以防万一”，引导目的状语从句。

49. 答案：B。解析：although引导让步状语从句，“尽管我们已经订了桌，我们还是等了半个小时”。

50. 答案：B。解析：as long as意为“只要”，引导条件状语从句，“只要有阳光、大海和海滩，我不介意我们去哪里”。

来源：蒙古元素