技巧一：用‘5W1H’拓展细节

通过回答Who/What/When/Where/Why/How来补充信息。例如原句‘He solved the problem’可扩写为‘The young engineer (Who) creatively solved the technical problem (What) during yesterday's team meeting (When) in the laboratory (Where) by analyzing data systematically (How) to ensure project progress (Why)’。注意选择与主题最相关的2-3个维度即可，避免冗长。

技巧二：巧用连接词分层论述

使用Moreover/Furthermore/For instance等连接词引出新层次。以‘Exercise is important’为例，可分段扩展：‘Firstly, it enhances physical health by...’、‘Furthermore, regular exercise also benefits mental wellbeing as...’、‘For instance, a Harvard study shows that...’。每个观点保持2-3句解释，形成递进式结构。

技巧三：名词短语与从句转换

将简单名词转化为包含定语从句或介词短语的复杂结构。比如‘a book’→‘a book which explores cultural differences’；‘a decision’→‘a decision made after careful consideration’。同时可将短句合并：‘She is a teacher. She works in Beijing.’→‘She is a teacher who works in Beijing.’这种转换能自然增加15-20%字数。

常见误区与避坑指南

避免无意义的重复（如‘very very important’）或离题内容。检查扩写部分是否：1) 与主题句逻辑连贯；2) 包含新信息；3) 使用恰当的语法结构。建议先完成核心内容，再针对薄弱段落集中扩写。中级学习者可尝试‘反向练习’：将长文缩写再对比原文，体会扩写逻辑。

几个练习句子

扩写：She enjoys reading novels, especially those with intricate plots and vivid characters.

原句：她喜欢读书。

扩写：The park is breathtaking, with blooming flowers, chirping birds, and a serene lake reflecting the blue sky.

原句：公园很美。

扩写：Technology has profoundly transformed our daily lives, from instant communication to efficient transportation systems.

原句：科技改变生活。

结论

有效的英语作文扩写是思维深度的延伸，而非词汇量的堆砌。掌握5W1H细节补充、连接词分层论述和句式转换三大技巧，能系统性地提升文章长度与质量。建议平时积累常用的扩写‘模板句’，并定期进行针对性练习。记住：优秀的扩写应该让读者觉得信息更丰富，而不是更啰嗦。