高中英语读后续写是考察学生英语写作能力的重要题型，以下是一些技巧和方法，帮助学生提高读后续写的能力：

技巧：

1. 理解原文：首先要仔细阅读原文，理解其背景、主题和情节。

2. 预测情节：根据原文内容，预测接下来的情节发展。

3. 角色定位：明确每个角色的性格、动机和目标。

4. 保持一致性：在续写中保持原文的时态、语气和风格。

5. 合理布局：合理安排文章结构，使文章条理清晰。

方法：

1. 段落划分：将续写部分划分为几个段落，每个段落围绕一个中心思想展开。

2. 开头引入：在开头部分，简要回顾原文，并引出新的情节。

3. 情节发展：在中间部分，根据预测的情节发展，描述事件的发生过程。

4. 高潮部分：在文章的高潮部分，详细描述事件的转折点，增加紧张感和悬念。

5. 结尾总结：在结尾部分，对文章进行总结，使文章结构完整。

6. 语言运用：在续写过程中，注意使用正确的语法、词汇和句型，使文章语言流畅。

以下是一个具体的示例：

原文：John was walking home from school when he saw a small, injured bird on the ground. He picked it up and took it home, hoping to nurse it back to health.

续写：

John carefully placed the bird in a small box and covered it with a soft cloth. He went to the kitchen and fetched some water and bread. He gently fed the bird, making sure it didn't choke. As the days passed, the bird began to recover and regain its strength.

One afternoon, as John was feeding the bird, he noticed a small, colorful feather sticking out of its wing. He carefully pulled it out and examined it. The feather was unique, unlike any he had ever seen before. He decided to keep it as a souvenir of his kindness.

One day, as John was walking home from school, he saw the same bird flying freely in the sky. He smiled, knowing that he had helped save a life. He continued walking, feeling a sense of fulfillment and happiness.

注意事项：

1. 不要过度发挥：续写部分要紧扣原文，不要偏离主题。

2. 注意篇幅：续写部分不宜过长，一般控制在100-150词左右。

3. 避免抄袭：在续写过程中，要注意原创性，不要直接抄袭原文。

通过以上技巧和方法，相信你在高中英语读后续写方面会有所提高。祝你写作顺利！