关于保护水的英语作文结尾，可以总结以下几种表达方式，结合不同体裁和写作需求进行选择：
一、总结性结尾
1. In conclusion, protecting water is not just a responsibility but a necessity for survival. Let's take action now to preserve this precious resource!（总结性陈述+行动呼吁）
2. To sum up, we must recognize the urgency of water conservation and work together to ensure its availability for future generations.（概括核心观点+未来展望）
二、行动号召型结尾
1. Every drop counts! Let's reduce waste, recycle water, and support clean-up initiatives to keep our rivers and lakes pristine.（具体行动建议）
2. The time to act is now! By implementing small changes in our daily lives, we can make a significant impact on water conservation.（紧迫感+行动倡议）
三、哲理性结尾
1. Water is the essence of life, flowing through nature's cycles and sustaining all forms of existence. It reminds us to be humble and grateful for this gift.（哲理思考）
2. Just as a river flows to the ocean, our collective efforts in water conservation will lead to a healthier planet.（比喻手法）
四、简洁有力型结尾
1. Save water, save life!（简洁口号）
2. Protect water, protect us!（因果关联）
建议根据作文主题和受众选择合适的结尾类型。例如，议论文适合用总结性或行动号召型，记叙文可结合具体事例升华主题，而哲理性结尾则适合引发读者深层思考。写作时注意使用连接词（如"Therefore," "In conclusion,"）使结尾与正文衔接自然。