语法总结
not so ... as 比较结构
People are not so honest as they once were 表示现在不如过去诚实。
相似句：
- He is not so tall as his brother.
- This road is not so busy as before.
without + 动名词
walked out without paying 中 paying 作介词 without 的宾语。
相似句：
- He left without saying goodbye.
- She took it without asking.