不定式状语从句是英语语法中的重要结构,用于描述动作或状态的目的或结果。它可以用于描述动作的目的,如"I went to the store to buy some milk",也可以用于描述动作的结果,如"She was too tired to walk any further"。不定式状语从句与不定式作宾语需要区分,如"I want to go to the store to buy some milk"与"I went to the store to buy some milk"的区别。在某些情况下,可以使用“in order to”或“so as to”来强调目的或结果。
1. 目的状语从句
不定式状语从句可以用于描述一个动作的目的,通常放在一个动词后面,例如:
- I went to the store to buy some milk.(我去商店买牛奶。)
- She studies hard to pass the exam.(她努力学习以通过考试。)
- He works overtime to earn more money.(他加班工作以赚更多的钱。)
2. 结果状语从句
不定式状语从句也可以用于描述一个动作的结果,通常放在一个形容词或副词后面,例如:
- She was too tired to walk any further.(她太累了,走不了更远。)
- He is so smart as to solve the problem quickly.(他非常聪明,能够快速解决问题。)
- The book was too difficult for me to understand.(这本书对我来说太难懂了。)
3. 注意事项
需要注意的是,不定式状语从句不应该与不定式作宾语区分开来。例如:
- I want to go to the store to buy some milk.(我想去商店买牛奶。)(不定式作宾语)
- I went to the store to buy some milk.(我去商店买牛奶。)(不定式状语从句)
此外,不定式状语从句通常不需要使用连词引导,但在某些情况下,可以使用“in order to”或“so as to”来强调目的或结果。