过去时态是叙事的骨架。<b>简单过去时</b> (walked) 推动情节;<b>过去进行时</b> (was waiting) 描绘背景或场景。区分它们的使用,是构建复杂故事的关键第一步。 Past tenses are the skeleton of narrative. The <b>Simple Past</b> (walked) drives the plot; the <b>Past Continuous</b> (was waiting) sets the background or scene. Mastering this distinction is the essential first step to complex storytelling.