九年级英语条件状语从句单选题40题

九年级英语条件状语从句单选题40题
1.If it rains tomorrow, we _____ stay at home.
A.will
B.would
C.should
D.must
答案：A。

本题考查条件状语从句“主将从现”的用法。

if 引导的条件状语从句用一般现在时，主句用一般将来时。

B 选项would 用于过去将来时；C 选项should 表示应该；D 选项must 表示必须，均不符合条件状语从句的用法。

2.We will go for a picnic if the weather _____ fine.
A.is
B.was
C.will be
D.would be
答案：A。

“主将从现”，if 引导的条件状语从句用一般现在时，weather 是不可数名词，be 动词用is。

B 选项was 是过去式；C 选项will be 和D 选项would be 不符合条件状语从句的用法。

3.If you study hard, you _____ good grades.
A.get
B.will get
C.would get
D.got
答案：B。

“主将从现”，if 引导的条件状语从句用一般现在时，主句用一般将来时。

A 选项get 是一般现在时；C 选项would get 用于过去将来时；D 选项got 是过去式。

4.She will go shopping if she _____ time.
A.has
B.have
C.will have
D.would have
答案：A。

“主将从现”，if 引导的条件状语从句用一般现在时，she 是第三人称单数，have 变为has。

B 选项have 用于第一、二人称和复数；C 选项will have 和D 选项would have 不符合条件状语从句的用法。

5.If he _____ early, he can catch the bus.
A.gets up
B.get up
C.will get up
D.would get up
答案：A。

“主将从现”，if 引导的条件状语从句用一般现在时，he 是第三人称单数，get up 变为gets up。

B 选项get up 用于第一、二人称和复数；C 选项will get up 和D 选项would get up 不符合条件状语从句的用法。

6.If it rains tomorrow, we will cancel the sports meet. “rains”在条件状语从句中表示“下雨”，本题考查if 引导的条件状语从句，遵循“主将从现”原则，即主句用一般将来时，从句用一般现在时。

答案：rains。

7.We will go on a picnic unless it rains. “unless”表示“除非”，本题中如果不下雨就去野餐，同样遵循“主将从现”原则。

答案：rains。

8.We will hold the basketball game if the weather is fine. “is fine”表示“天气好”，根据条件状语从句“主将从现”原则。

答案：is fine。

9.We won't have the outdoor activity if it is windy. “is windy”表示“有风”，“主将从现”原则。

答案：is windy。

10.We will play football if we finish our homework early. “finish”在条件状语从句中用原形，“主将从现”原则。

答案：finish。

11.If the government had taken more measures earlier, the environment would be better now.
A.had taken
B.took
C.takes
D.will take
答案：A。

本题考查虚拟语气中对过去情况的虚拟，从句用had done，主句用would/could/might/should have done。

12.If people had been more aware of environmental protection, we wouldn't be facing such serious pollution now.
A.had been
B.were
C.are
D.will be
答案：A。

同样是对过去情况的虚拟，从句had been，主句wouldn't be facing。

13.If the company had invested more in research and development, it would have more competitive products now.
A.had invested
B.invested
C.invests
D.will invest
答案：A。

对过去的虚拟，从句had invested，主句would have。

14.If the scientists had discovered the cure earlier, many lives would have been saved.
A.had discovered
B.discovered
C.discovers
D.will discover
答案：A。

对过去的虚拟，从句had discovered，主句would have been saved。

15.If the world had acted more quickly on climate change, we would be in a better situation now.
A.had acted
B.acted
C.acts
D.will act
答案：A。

对过去的虚拟，从句had acted，主句would be。

16.If he reads "The Adventures of Tom Sawyer", he will understand American culture better.（如果他读《汤姆·索亚历险记》，他会更好地理解美国文化。

）
A.时间状语从句
B.条件状语从句
C.宾语从句
D.定语从句
答案：B。

本题是一个条件状语从句，“If he reads "The Adventures of Tom Sawyer”表示条件，如果……，后面的“he will understand American culture better”是在这个条件下会产生的结果。

A 选项时间状语从句通常表示时间关系；C 选项宾语从句在句子中作宾语；D 选项定语从句用来修饰名词或代词。

17.She will succeed in the exam only if she studies hard.（她只有努力学习才能在考试中成功。

）
A.结果状语从句
B.条件状语从句
C.让步状语从句
D.目的状语从句
答案：B。

这是一个条件状语从句，“only if she studies hard”表示条件，只有……才……。

A 选项结果状语从句表示结果；C 选项让步状语从句表示让步关系；D 选项目的状语从句表示目的。

18.If I had a magic wand, I could change the world.（如果我有一根
魔法棒，我就能改变世界。

）
A.虚拟条件状语从句
B.真实条件状语从句
C.原因状语从句
D.方式状语从句
答案：A。

本题是一个虚拟条件状语从句，“If I had a magic wand”表示与现在事实相反的假设，后面的“I could change the world”是在这个假设下的结果。

B 选项真实条件状语从句表示现实中可能发生的条件；C 选项原因状语从句表示原因；D 选项方式状语从句表示方式。

19.He will go on a trip if it doesn't rain.（（如果不下雨，他就去旅行。

）
A.条件状语从句
B.时间状语从句
C.地点状语从句
D.比较状语从句
答案：A。

这是一个条件状语从句，“if it doesn't rain”表示条件，如果……。

B 选项时间状语从句表示时间关系；C 选项地点状语从句表示地点；D 选项比较状语从句表示比较关系。

20.If you read "Pride and Prejudice", you will fall in love with English literature.（如果你读《傲慢与偏见》，你会爱上英国文学。

）
A.条件状语从句
B.原因状语从句
C.目的状语从句
D.结果状语从句
答案：A。

本题是一个条件状语从句，“If you read "Pride and Prejudice”表示条件，如果……，后面的“you will fall in love with English literature”是在这个条件下会产生的结果。

B 选项原因状语从句表示原因；C 选项目的状语从句表示目的；D 选项结果状语从句表示结
果。

21.If we continue to develop new technologies, our lives will become more convenient.
A.will become
B.become
C.would become
D.became
答案：A。

本题考查条件状语从句中“主将从现”的用法。

if 引导的条件状语从句用一般现在时，主句用一般将来时。

22.Unless we protect our environment, future generations will suffer from pollution.
A.will suffer
B.suffer
C.would suffer
D.suffered
答案：A。

unless 相当于if...not，在条件状语从句中同样遵循“主将从现”。

23.If scientists discover a cure for cancer, many people's lives will be saved.
A.will be saved
B.be saved
C.would be saved
D.were saved
答案：A。

条件状语从句中“主将从现”的运用，主句用一般将来时的被动语态。

24.Only if we invest in scientific research, can we make great progress in technology.
A.can we make
B.we make
C.we will make
D.would we make
答案：A。

“only if”引导条件状语从句置于句首，主句要部分倒装。

25.If everyone uses technology wisely, our society will develop in a sustainable way.
A.will develop
B.develop
C.would develop
D.developed
答案：A。

条件状语从句中“主将从现”，主句用一般将来时。

26.If the ancient king had listened to his advisors, his kingdom would be stronger.
A.had listened
B.listened
C.listens
答案：A。

本题考查虚拟语气中条件状语从句的时态呼应。

从句表示与过去事实相反，应用had done 的形式。

27.If the great general had made a different decision in the battle, the outcome would be changed.
A.had made
B.made
C.makes
D.will make
答案：A。

与过去事实相反，条件状语从句用had done 的形式。

28.If the famous queen had known the future, she would have taken different actions.
A.had known
B.knew
C.knows
D.will know
答案：A。

同样是与过去事实相反，从句用had done。

29.If the ancient hero had not been so brave, the story would be different.
A.had not been
B.was not
C.is not
答案：A。

与过去事实相反，否定形式也是had not done。

30.If the historical figure had chosen another path, his life would have been altered.
A.had chosen
B.chose
C.chooses
D.will choose
答案：A。

依旧是与过去事实相反，条件状语从句用had done。

31.If he had known the danger,he would not have gone there.
Just as he would not have gone there if he had known the danger,he would not have gone there if known the danger.
In this case,the conditional clause is shortened by omitting “he had been”.The answer is the second sentence.The omission makes the sentence more concise and natural.
32.If she had had enough time,she would have finished the work.
Just as she would have finished the work if she had had enough time,she would have finished the work if had enough time.
Here,the conditional clause is abbreviated by dropping “she had had”.The correct answer is the second sentence.The omission simplifies the expression.
33.If they had been careful,they would not have had an accident.
Just as they would not have had an accident if they had been careful,they would not have had an accident if been careful.
The conditional clause is shortened by leaving out “they had been”.The answer is the second sentence.The omission makes the sentence more straightforward.
34.If he had studied hard,he would have passed the exam.
Just as he would have passed the exam if he had studied hard,he would have passed the exam if studied hard.
In this example,the conditional clause is abbreviated by omitting “he had”.The correct answer is the second sentence.The omission makes the sentence more succinct.
35.If she had taken the medicine on time,she would have recovered quickly.
Just as she would have recovered quickly if she had taken the medicine on time,she would have recovered quickly if taken the medicine on time.
The conditional clause is shortened by dropping “she had taken”.The answer is the second sentence.The omission makes the sentence more concise.
36.If the government takes more measures to protect the environment,our city will be more beautiful.
A.Only if the government takes more measures to protect the
environment will our city be more beautiful.
B.If only the government takes more measures to protect the environment,our city will be more beautiful.
C.Unless the government takes more measures to protect the environment,our city will be more beautiful.
D.Even if the government takes more measures to protect the environment,our city will be more beautiful.
答案：A。

本题考查条件状语从句的倒装用法。

A 选项“Only if the government takes more measures to protect the environment will our city be more beautiful.”是正确的倒装形式，only if 位于句首时，句子要部分倒装，即把助动词、情态动词或be 动词提到主语前面。

B 选项“If only the government takes more measures to protect the environment,our city will be more beautiful.”不是倒装形式，if only 表示“要是……就好了”。

C 选项“Unless the government takes more measures to protect the environment,our city will be more beautiful.”不是倒装形式，unless 表示“除非”。

D 选项“Even if the government takes more measures to protect the environment,our city will be more beautiful.”不是倒装形式，even if 表示“即使”。

37.If everyone does his part in protecting the environment,the world will be a better place.
A.Only if everyone does his part in protecting the environment will the world be a better place.
B.If only everyone does his part in protecting the environment,the world will be a better place.
C.Unless everyone does his part in protecting the environment,the world will be a better place.
D.Even if everyone does his part in protecting the environment,the world will be a better place.
答案：A。

A 选项“Only if everyone does his part in protecting the environment will the world be a better place.”是正确的倒装形式，only if 位于句首时，句子要部分倒装。

B 选项“If only everyone does his part in protecting the environment,the world will be a better place.”不是倒装形式，if only 表示“要是……就好了”。

C 选项“Unless everyone does his part in protecting the environment,the world will be a better place.”不是倒装形式，unless 表示“除非”。

D 选项“Even if everyone does his part in protecting the environment,the world will be a better place.”不是倒装形式，even if 表示“即使”。

38.If we recycle more waste materials,we can save more natural resources.
A.Only if we recycle more waste materials will we be able to save more natural resources.
B.If only we recycle more waste materials,we can save more natural resources.
C.Unless we recycle more waste materials,we can save more natural
resources.
D.Even if we recycle more waste materials,we can save more natural resources.
答案：A。

A 选项“Only if we recycle more waste materials will we be able to save more natural resources.”是正确的倒装形式，only if 位于句首时，句子要部分倒装。

B 选项“If only we recycle more waste materials,we can save more natural resources.”不是倒装形式，if only 表示“要是……就好了”。

C 选项“Unless we recycle more waste materials,we can save more natural resources.”不是倒装形式，unless 表示“除非”。

D 选项“Even if we recycle more waste materials,we can save more natural resources.”不是倒装形式，even if 表示“即使”。

39.If people use public transportation more often,there will be less air pollution.
A.Only if people use public transportation more often will there be less air pollution.
B.If only people use public transportation more often,there will be less air pollution.
C.Unless people use public transportation more often,there will be less air pollution.
D.Even if people use public transportation more often,there will be less air pollution.
答案：A。

A 选项“Only if people use public transportation more often
will there be less air pollution.”是正确的倒装形式，only if 位于句首时，句子要部分倒装。

B 选项“If only people use public transportation more often,there will be less air pollution.”不是倒装形式，if only 表示“要是……就好了”。

C 选项“Unless people use public transportation more often,there will be less air pollution.”不是倒装形式，unless 表示“除非”。

D 选项“Even if people use public transportation more often,there will be less air pollution.”不是倒装形式，even if 表示“即使”。

40.If we plant more trees,the air will be cleaner.
A.Only if we plant more trees will the air be cleaner.
B.If only we plant more trees,the air will be cleaner.
C.Unless we plant more trees,the air will be。