语法总结
Though / though 引导让步
Though she hesitated for a moment, she finally went in... 先写短暂犹豫，再写真正行动，是本课人物心理推进的起点。
相似句：
- Though he disliked the assistant, he stayed calm.
- Though she was angry, she said nothing at first.
Not realizing ... 作原因状语
Not realizing who she was... 说明售货员态度转变的原因，是否定分词短语，逻辑主语仍然是 the assistant。
相似句：
- Not knowing the truth, he spoke too freely.
- Not seeing the sign, she walked straight in.
before finally doing 的顺序表达
before finally buying the dress... 把“先折腾对方、最后才买下”这个顺序交代得很清楚，特别适合复述结尾反击。
相似句：
- She looked at several coats before finally choosing one.
- He argued for a long time before finally agreeing.