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人教版九年级英语动词不定式作目的状语 讲解及练习
动词不定式作目的状语核心语法点讲解
一、定义
动词不定式（to + 动词原形）作目的状语时，用于说明主句动作发生的目的，即“为了……”。
二、基本结构与位置
1.句尾位置（最常用）：主句 + to do
例：He gets up early to catch the first bus.
2.句首位置（强调目的，常用逗号隔开）：To do, + 主句
例：To improve his English, he reads English every morning.
三、常用扩展结构
①in order to do：可置于句首或句尾，语气比 to do 稍强，同样表目的。
例：She studies hard in order to pass the exam. / In order to save time, we take the subway.
②so as to do：只能置于句尾，不能放在句首。
例：They speak loudly so as to be heard clearly.
四、否定形式
不定式的否定形式为 not to do，对应的扩展结构否定形式是 in order not to do / so as not to do。
例：She kept quiet not to wake up the baby. / He walked slowly in order not to fall down.
五、注意事项
①不定式作目的状语时，其逻辑主语通常与主句主语一致。
例：We come here to learn English.（to learn 的逻辑主语是 we）
②若目的状语的逻辑主语与主句主语不一致，需用 for sb. to do 结构。
例：The teacher opened the window for the students to breathe fresh air.
一、选择填空
（ ）1. We should study hard ______ get good grades.
A. in order B. to C. so that D. such that
（ ）2. ______ catch the early bus, he got up at 5 o’clock.
A. To B. In order C. So as D. So that
（ ）3. She speaks slowly ______ we can understand her.
A. to B. in order to C. so as to D. so that
（ ）4. They are working hard ______ earn more money.
A. so as B. in order to C. in order D. so that
（ ）5. He kept quiet ______ not to wake up the sleeping baby.
A. in order B. in order to C. get D. so that
（ ）6. ______ not to miss the train, we set off early.
A. In order to B. To C. In order D. So as to
（ ）7. The teacher speaks loudly ______ the students can hear her clearly.
A. to B. in order to C. so as to D. so that
（ ）8. We go to the library ______ borrow books.
A. to B. so that C. such that D. in order
（ ）9. She took a taxi ______ she could arrive on time.
A. to B. in order to C. so as to D. so that
（ ）10. ______ improve his spoken English, he practices every day.
A. So as to B. In order to C. In order D. So that
（ ）11. They turned down the music ______ not to disturb the neighbors.
A. so as to B. in order to C. to D. so that
（ ）12. I need a pen ______ write a letter.
A. to B. so that C. such that D. for
（ ）13. ______ finish the work on time, we asked for help.
A. So as to B. In order to C. To D. B and C
（ ）14. He opened the door ______ let the fresh air in.
A. so that B. in order to C. in order D. such that
（ ）15. We should plant more trees ______ protect the environment.
A. to B. so that C. such that D. for
（ ）16. She studies late at night ______ pass the final exam.
A. in order to B. so that C. such that D. for
（ ）17. ______ get there on time, we have to leave now.
A. To B. So as to C. In order to D. All of the above
（ ）18. They saved money ______ buy a new house.
A. to B. so that C. such that D. in order
（ ）19. The girl stood up ______ see the blackboard clearly.
A. to B. so that C. such that D. for
（ ）20. He closed the door quietly ______ not to wake his parents.
A. so as to B. in order to C. to D. A, B and C
二、翻译句子（补全横线部分）
我来这儿是为了学习英语。
I come here _________________________ English.
为了赶上火车，我们早早出发了。
_________________________ the train, we set off early.
她努力学习是为了通过考试。
She studies hard _________________________ the exam.
为了不迟到，他跑着去学校。
_________________________ late, he ran to school.
我们应该多锻炼来保持健康。
We should take more exercise _________________________ healthy.
为了提高记忆力，他每天记单词。
_________________________ his memory, he memorizes words every day.
他们大声说话是为了被别人听到。
They speak loudly _________________________ by others.
为了节省能源，我们离开时要关灯。
_________________________ energy, we should turn off the lights when leaving.
他买了一辆新自行车，以便于每天骑车上班。
He bought a new bike _________________________ to work every day.
为了不打扰别人，我们在图书馆要保持安静。
_________________________ others, we should keep quiet in the library.
我需要一把钥匙来开门。
I need a key _________________________ the door.
为了赢得比赛，他们每天刻苦训练。
_________________________ the match, they train hard every day.
她带了一把伞，以防下雨。
She took an umbrella _________________________ the rain.
为了保护环境，我们要减少使用塑料袋。
_________________________ the environment, we should use fewer plastic bags.
他学习画画是为了成为一名画家。
He learns to paint _________________________ a painter.
为了按时完成作业，她放弃了看电视。
_________________________ her homework on time, she gave up watching TV.
我们去超市是为了买一些食物。
We go to the supermarket _________________________ some food.
为了不犯错，他认真检查了作业。
_________________________ mistakes, he checked his homework carefully.
他们建了一座新桥，以便于人们出行。
They built a new bridge _________________________ people to travel easily.
为了了解历史，我们阅读了很多相关书籍。
_________________________ history, we read many related books.
三、用动词不定式完成句子
She gets up early _________________________ (catch) the first bus.
_________________________ (improve) your English, you should read more.
We exercise every day _________________________ (keep) healthy.
_________________________ (not wake) the baby, he walked quietly.
They went to the park _________________________ (have) a picnic.
_________________________ (pass) the exam, he studies very hard.
I need a pen _________________________ (write) a letter.
_________________________ (save) time, we took a taxi.
He opened the window _________________________ (let) fresh air in.
_________________________ (not disturb) the neighbors, they turned down the music.
She bought a new dress _________________________ (wear) to the party.
_________________________ (learn) more about the city, we visited the museum.
We should plant more trees _________________________ (protect) the environment.
_________________________ (finish) the work on time, we asked for help.
He studies late at night _________________________ (catch up with) his classmates.
_________________________ (not miss) the train, we left home early.
They saved money _________________________ (buy) a new car.
_________________________ (see) the blackboard clearly, the boy stood up.
She practices singing every day _________________________ (become) a singer.
_________________________ (keep) the room clean, we should clean it every day.
四、句型转换
He studies hard because he wants to pass the exam.（改为含不定式的句子）
He studies hard _________________________ pass the exam.
We set off early so that we can catch the early bus.（改为含不定式的句子）
We set off early _________________________ catch the early bus.
She speaks loudly so that she can be heard.（改为含不定式的句子）
She speaks loudly _________________________ heard.
I came here because I want to see you.（改为含不定式的句子）
I came here _________________________ see you.
They work hard so that they can earn more money.（改为含不定式的句子）
They work hard _________________________ earn more money.
He walked slowly so that he would not fall down.（改为含不定式的句子）
He walked slowly _________________________ fall down.
We should eat more fruit so that we can keep healthy.（改为含不定式的句子）
We should eat more fruit _________________________ healthy.
She bought a new bike so that she could ride to school.（改为含不定式的句子）
She bought a new bike _________________________ to school.
They turned down the music so that they would not disturb others.（改为含不定式的句子）
They turned down the music _________________________ others.
He practices every day so that he can improve his spoken English.（改为含不定式的句子）
He practices every day _________________________ his spoken English.
To improve his grades, he studies late.（改为用in order to的句子）
_________________________ improve his grades, he studies late.
She got up early to catch the bus.（改为强调目的的句首结构）
_________________________ catch the bus, she got up early.
We take exercise to keep healthy.（改为用so as to的句子）
We take exercise _________________________ keep healthy.
He opened the door to let the cat in.（对划线部分提问）
_________________________ he open the door
She studies hard to pass the exam.（对划线部分提问）
_________________________ she study hard
To not wake the baby, he kept quiet.（改为正确的否定形式）
_________________________ wake the baby, he kept quiet.
They saved money to buy a new house.（改为用in order to的句子）
They saved money _________________________ buy a new house.
We go to the library to borrow books.（对划线部分提问）
_________________________ you go to the library
He closed the window to not let the wind in.（改为正确的否定形式）
He closed the window _________________________ let the wind in.
She practices singing every day to become a singer.（对划线部分提问）
_________________________ she practice singing every day
参考答案
一、选择填空
1.B 2.A 3.D 4.B 5.B 6.A 7.D 8.A 9.D 10.B
11.A 12.A 13.D 14.B 15.A 16.A 17.D 18.A 19.A 20.D
二、翻译句子
to learn
To catch
to pass
In order not to be
to keep
To improve
to be heard
To save
to ride
In order not to disturb
to open
To win
to prevent
To protect
to become
To finish
to buy
In order not to make
to help
To learn about
三、用动词不定式完成句子
to catch
To improve
to keep
In order not to wake
to have
To pass
to write
To save
to let
In order not to disturb
to wear
To learn
to protect
To finish
to catch up with
In order not to miss
to buy
To see
to become
To keep
四、句型转换
to
to
to be
to
to
in order not to
to keep
to ride
in order not to disturb
to improve
In order to
To
so as to
Why did
Why does
In order not to
in order to
Why do
in order not to
Why does

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