人教版九年级英语动词不定式作目的状语 讲解及练习（含答案）

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 ... ...