千里之行，始于足下。 need的五种用法 1. Need as a verb: it indicates a requirement or necessity. Example: I need to finish my assignment by tomorrow. 2. Need as a noun: it refers to something that is essential or required. Example: I have a need for sleep after a long day at work. 3. Need + to-infinitive: it expresses a lack or requirement for something to be done. Example: You need to clean your room before you can go out. 4. Need + object + to-infinitive: it indicates that someone else requires or demands something to be done. Example: My boss needs me to finish the report by the end of the day. 5. Don't need to + verb: it expresses the lack of necessity or requirement for something to be done. Example: You don't need to bring your laptop to the meeting. 第 1 页/共 1 页 本文来源：https://www.wddqw.com/doc/825967b1a2c7aa00b52acfc789eb172ded6399f4.html