在高中阶段的学习中，写作是英语学习的重要组成部分之一。掌握一定的写作技巧和结构对于提高学生的英语综合能力具有重要作用。下面将分享10篇以三段式结构撰写的高中英语作文范文，帮助同学们提升写作水平。
范文一：The Importance of Environmental Protection
第一段（引入）: In the recent years, environmental protection has been a hot topic among people of all ages. It is essential for us to take care of our environment in order to sustain the quality of life on earth. The increasing pollution has led to numerous problems such as global warming and climate change, which have a significant impact on human life.
第二段（讨论）: To protect our environment, there are various actions that can be taken by individuals and communities. For example, we can start by reducing the use of plastic bags and bottles, recycling waste materials, conserving water and electricity, and using public transportation more often. Additionally, planting more trees and creating green areas can help improve air quality and reduce carbon emissions.
第三段（总结）: In conclusion, it is crucial for everyone to participate in protecting the environment. By adopting eco-friendly practices in our daily lives and encouraging others to do the same, we can make a positive difference. Remember, every small action counts when it comes to preserving our planet for future generations.
范文二：The Advantages of Living in a Big City
第一段（引入）: Many people dream of living in a big city because of its numerous benefits. Cities offer a wide range of opportunities for education, employment, and entertainment. They are also centers of cultural and technological advancements, providing an exciting lifestyle for residents.
第二段（讨论）: One of the main advantages of living in a big city is the availability of diverse job opportunities. Cities attract businesses from various industries, offering a vast number of career options. Moreover, cities provide access to high-quality educational institutions, museums, theaters, and other cultural facilities, enriching the residents’ lives. The well-developed public transportation system makes it easy to navigate through the city and connect with different parts of the metropolitan area.
第三段（总结）: In summary, living in a big city provides many advantages, including better job prospects, educational opportunities, and a vibrant cultural scene. However, it is important to consider factors like cost of living and potential stress before making the decision to move to a big city. With careful planning and consideration, one can enjoy the numerous benefits that come with urban living.
范文三：The Impact of Social Media on Society
第一段（引入）: Social media has become an integral part of modern society, influencing how we communicate, share information, and perceive the world around us. Platforms like Facebook, Twitter, and Instagram have billions of users worldwide, making them powerful tools for social interaction and information dissemination.
第二段（讨论）: While social media offers several benefits, such as connecting people across distances and facilitating real-time communication, it also has some negative impacts. The constant exposure to curated images and posts can lead to unrealistic expectations and comparisons, affecting self-esteem and mental health. Additionally, social media can spread misinformation quickly, leading to confusion and mistrust among people. It is important to use social media responsibly and critically evaluate the content we consume and share.
第三段（总结）: In conclusion, social media plays a significant role in shaping contemporary society. It is up to each individual to utilize these platforms wisely, balancing their benefits with the potential drawbacks. By being mindful of our social media usage and promoting positive interactions online, we can contribute to a healthier digital environment.
以上是三篇高中三段式英语作文的范文，涵盖了环境保护、城市生活和社交媒体等不同话题。希望这些范文能够帮助你更好地理解三段式结构的写作方法，并在自己的作文中加以运用。