一、so+形容词+that从句

1. The weather was so cold that we had to stay indoors all day. （天气如此寒冷以至于我们整天待在室内。）

2. The song was so beautiful that I couldn't stop humming it. （这首歌如此美妙以至于我忍不住哼唱。）

3. The cake was so delicious that I ate it all in one bite. （蛋糕如此美味以至于我一口气吃完了。）

二、so+副词+that从句

1. The movie started so suddenly that I missed the opening scene. （电影开始得如此突然以至于我错过了开场白。）

2. The problem was so complex that we needed more time to solve it. （问题如此复杂以至于我们需要更多时间来解决。）

3. The runner was so fast that I could hardly keep up. （跑者跑得如此快以至于我几乎追不上。）

三、结构解析

so后接形容词（如beautiful, cold）或副词（如excitingly, suddenly），修饰主句谓语动词或整个句子。

that引导结果状语从句，表示"如此...以至于..."，从句中常用"could not"（否定）或"did"（肯定）等情态动词。

注意：当so修饰名词时，需用"such...that"结构。

四、扩展应用

否定句：The task was so difficult that we failed to complete it on time. （任务如此困难以至于我们未能按时完成。）

复合结构：He spoke so softly that I could hardly hear him. （他说话如此轻柔以至于我几乎听不见。）

建议结合不同场景练习，注意形容词/副词的选择与主句谓语的搭配。