“不定式表目的” (Infinitive of Purpose)
🔒 登录后可标记已读- 为了说清楚「做这件事是为了什么」,英文用 to + 动词原形(不定式),对应中文的「为了…」,但不需要 because。
- 结构很简单,用来回答 Why? 这个问题,比如 I use it to go to work(我用它上班)。
- 常见错误是把 to 和 for 搞混——for 后面接名词(for the lesson),to 后面接动词原形(to learn),两者不能混用。
- 口语里非常高频,解释「为什么存钱」「为什么搭出租车」这类日常场景几乎都会用到。
重点内容
基本结构:to + 动词原形
用来回答「为什么?」(why?)这个问题。
Why do you have a bicycle? I use it to go to work. 我用它上班。(目的:去上班)
Why does she run every morning? She runs to keep fit. 她跑步是为了保持健康。
常见例句模式
- He went to the shops to buy some shoes.
他去商店买鞋子。
- I'm writing to ask for your help.
我写信是为了请求你的帮助。
- My father runs every day to keep healthy.
我爸每天跑步是为了保持健康。
- We eat at home to save money.
我们在家吃饭是为了省钱。
💡 这个结构非常口语化,日常对话里用得很多。
例句练习
- She went to the library to study for her exam.
她去图书馆备考。
- I downloaded this app to improve my English.
我下载这个 app 是为了提升我的英文。
- He's saving money to buy a new laptop.
他在存钱买一台新笔电。
- We took a taxi to get there faster.
我们坐出租车是为了更快到达。
- My parents moved to KL to find better jobs.
我父母搬到吉隆坡是为了找更好的工作。
常见错误
❌ I went to the supermarket for buy some groceries. ✅ I went to the supermarket to buy some groceries. (for 后面接名词,to 后面接动词原形)
❌ She studies hard for to pass the exam. ✅ She studies hard to pass the exam.
❌ I use this app for improving my English. ✅ I use this app to improve my English. (表目的时用 to-infinitive,不用 for + -ing)
💡 区分:
- to + 动词原形 → 表目的(为了做某事)
- for + 名词 → 表目的(为了某样东西)
例:I'm here to learn. / I'm here for the lesson.
Sources
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