资源简介

条件状语从句专项讲解练习
定义：由 if （如果）、 unless （除非=if not）引导，用来表示主句动作发生的条件，可置于句首（逗号隔开主句）或句尾。
条件状语从句的分类如下：
条件状语从句专项练习
Ⅰ. 用所给动词的适当形式填空
1. If you _______________(heat) ice, it __________________(turn) into water.
2. We _________________ (go) hiking if it __________________ (not rain) this Sunday.
3. You can _______________ (speak) English fluently if you practice (practice) every day.
4. If I __________________ (be) you, I __________________ (accept) that invitation.
5. She ____________________ (pass) the exam if she _____________________ (study) harder last term.
6. Unless he __________________ (finish) his homework, he ______________________(not play) computer games.
7. If it _______________________ (snow) tomorrow, we ________________________ (cancel) the sports meeting.
8. As long as you ___________________ (keep) trying, you _______________________(succeed) sooner or later.
9. If they ______________________(take) the early bus, they ___________________________ (not miss) the train.
10. If a plant__________________________(not get) enough sunlight, it __________________ (die) slowly.
Ⅱ. 单项选择（易错区分）
1. — I don’t know if it _______ tomorrow.
— If it _______, we won’t go for a picnic.
A. will rain; will rain B. will rain; rains C. rains; will rain D. rains; rains
2. If I _______ you, I _______ more attention to English grammar.
A. am; will pay B. were; would pay C. were; will pay D. am; would pay
3. You will fail the exam unless you _______ hard from now on.
A. work B. worked C. will work D. have worked
4. If she _______ here yesterday, she _______ us with the task.
A. was; would help B. was; would have helped C. had been; would help
D. had been; would have helped
5. — Shall we go swimming if it _______ fine this weekend
— Sounds great!
A. will be B. was C. is D. were
6. I wonder if she _______ to the concert. If she _______, I’ll tell you at once.
A. comes; comes B. will come; comes C. comes; will come D. will come; will come
7. If it _______ for the snow, we _______ the mountain yesterday.
A. were not; could have climbed B. were not; could climb C. had not been; could have climbed D. had not been; could climb
8. As long as you _______ the instructions, you _______ any danger.
A. follow; won’t face B. follow; don’t face C. will follow; won’t face D. will follow; don’t face
9. If he _______ the teacher’s advice, he _______ in the exam.
A. took; wouldn’t fail B. takes; wouldn’t fail C. had taken; wouldn’t have failed
D. had taken; wouldn’t fail
10. You _______ get the prize if you _______ the game.
A. will; win B. will; will win C. would; win D. would; won
Ⅲ. 句型转换
1. If you don’t hurry up, you will miss the bus.
→ _________________________________________________________(用unless替换)
2. If I were free, I would go shopping with you.
→__________________________________________________________（省略if的虚拟结构）
3. If you work hard, you will make progress.
→ _______________________________________________________________（祈使句+and句型）
4. If she had seen the film, she would have talked about it.
→ __________________________________________________________________（省略if的虚拟结构）
5. You can’t watch TV if you don’t finish your homework.
→ __________________________________________________________________（用unless替换）
6. If it doesn’t rain, we will have a picnic.
→ ___________________________________________________________________（用unless替换）
7. If I had enough money, I would buy a new phone.
→ _____________________________________________________________________（调整语序）
8. If you don’t take exercise, you will be unhealthy.
→ ______________________________________________________________________（祈使句+or句型）
9. If he had driven carefully, he wouldn’t have had an accident.
→ ________________________________________________________________________（调整语序）
10. If you pass the final exam, your parents will be happy.
→ ________________________________________________________________（祈使句+and句型）
Ⅳ. 单句改错（每句一处错误）
1. If it will rain tomorrow, we will cancel the plan.
改正：__________ → ________________
2. If I am you, I would choose the red dress.
改正：__________ → ________________
3. She would come if she has time yesterday.
改正：____________ → ________________
4. Unless you don’t give up, you will achieve your dream.
改正：_____________________
5. If he had listened to me, he wouldn’t make such a mistake.
改正：_____________ → ______________________
6. I don’t know if he comes tomorrow. If he comes, I’ll call you.
改正：___________________ → ____________________
7. If it snows tomorrow, we would build a snowman.
改正：________________ → _____________________
8. You will succeed as long as you will work hard.
改正：__________________________
9. Had he enough money, he would buy a car.
改正：________________________ → _______________________
10. If you heat water to 100℃, it boiled.
改正：__________________________ → _______________________
Ⅴ. 翻译句子
如果你坚持每天读英语，你的阅读能力会大大提高。
_____________________________________________________________________________________
要是我昨天见到他，我就会把这个消息告诉他了。
____________________________________________________________________________________
3. 除非你亲眼所见，否则你不会相信这件事。
____________________________________________________________________________________
4. 如果我是一只鸟，我就能自由地翱翔在天空中。
____________________________________________________________________________________
5. 只要你遵守交通规则，你就能保证自己的安全。
____________________________________________________________________________________
6. 如果明天下雨，运动会将推迟到下周。
____________________________________________________________________________________
7. 要是他没有错过火车，他现在就已经到这里了。
____________________________________________________________________________________
8. 如果你不努力学习，你将无法通过这次考试。
____________________________________________________________________________________
9. 假如我们有更多的时间，我们就能参观更多的景点。
____________________________________________________________________________________
10. 如果温度降到零度以下，水就会结冰。
____________________________________________________________________________________
参考答案与详细解析：
Ⅰ. 用所给动词的适当形式填空
1. heat; turns 解析：客观真理，主现从现。
2. will go; doesn’t rain 解析：将来可能的条件，主将从现。
3. can speak; practice 解析：表许可的情态动词搭配，主情从现。
4. were; would accept 解析：与现在事实相反的虚拟语气，从句用一般过去时（be动词统一用were），主句用would+动词原形。
5. would have passed; had studied 解析：与过去事实相反的虚拟语气，从句用过去完成时，主句用would have+过去分词。
6. finishes; won’t play 解析：unless = if not，遵循主将从现。
7. should snow; would cancel 解析：与将来事实相反的虚拟语气，从句用should+动词原形，主句用would+动词原形。
8. keep; will succeed 解析：as long as 引导真实条件句，遵循主将从现。
9. had taken; wouldn’t have missed 解析：与过去事实相反的虚拟语气，强调“过去没做某事导致的结果”。
10. doesn’t get; will die 解析：将来可能的条件，主将从现。
Ⅱ. 单项选择
1. B 解析：第一个if 表“是否”，引导宾语从句，根据tomorrow用一般将来时；第二个if 表“如果”，引导条件状语从句，遵循主将从现。
2. B 解析：与现在事实相反的虚拟语气，从句be动词用were，主句用would+动词原形。
3. A 解析：unless 引导条件状语从句，遵循主将从现，从句用一般现在时。
4. D 解析：yesterday 提示与过去事实相反的虚拟语气，从句用had been，主句用would have helped。
5. C 解析：if 引导条件状语从句，this weekend 表将来，遵循主将从现。
6. B 解析：第一个if 表“是否”，引导宾语从句用一般将来时；第二个if 表“如果”，引导条件状语从句用一般现在时。
7. C 解析：yesterday 提示与过去事实相反的虚拟语气，从句用had not been，主句用could have climbed。
8. A 解析：as long as 引导真实条件句，遵循主将从现。
9. C 解析：与过去事实相反的虚拟语气，从句用had taken，主句用wouldn’t have failed。
10. A 解析：if 引导真实条件句，遵循主将从现。
Ⅲ. 句型转换
1. Unless you hurry up, you will miss the bus.
2. Were I free, I would go shopping with you.
3. Work hard, and you will make progress.
4. Had she seen the film, she would have talked about it.
5. You can’t watch TV unless you finish your homework.
6. Unless it rains, we will have a picnic.
7. I would buy a new phone if I had enough money.
8. Take exercise, or you will be unhealthy.
9. He wouldn’t have had an accident if he had driven carefully.
10. Pass the final exam, and your parents will be happy.
Ⅳ. 单句改错（每句一处错误）
1. will rain → rains
解析：if 引导条件状语从句，遵循主将从现。
2. am → were
解析：与现在事实相反的虚拟语气，be动词用were。
3. has → had
解析：yesterday 提示与过去事实相反的虚拟语气，从句用过去完成时had had。
4. 去掉don’t
解析：unless 本身含否定含义，= if not，无需再加don’t。
5. make → have made
解析：与过去事实相反的虚拟语气，主句用wouldn’t have made。
6. 第一个comes → will come
解析：第一个if 表“是否”，引导宾语从句，根据tomorrow用一般将来时。
7. would → will
解析：tomorrow 提示真实条件句，遵循主将从现。
8. 去掉第二个will
解析：as long as 引导条件状语从句，遵循主将从现，从句用一般现在时。
9. Had he → If he had
解析：虚拟语气省略if 时，需将助动词had 提前，原句结构错误，改为If he had更通顺。
10. boiled → boils
解析：客观真理，主现从现，用一般现在时。
Ⅴ. 翻译句子
1. If you keep reading English every day, your reading ability will be greatly improved.
2. If I had seen him yesterday, I would have told him this news.
3. Unless you see it with your own eyes, you won’t believe it.
4. If I were a bird, I could fly freely in the sky.
5. As long as you follow the traffic rules, you can keep yourself safe.
6. If it rains tomorrow, the sports meeting will be put off until next week.
7. If he hadn’t missed the train, he would have arrived here now.
8. If you don’t study hard, you won’t pass this exam.
9. If we had more time, we could visit more scenic spots.
10. If the temperature drops below zero degrees Celsius, water will freeze.

展开更多......

收起↑