【问】 (a) In doing so，she gave a little sigh.

(b) In so doing，they only demonstrated their lack of good faith.

请问doing so与so doing哪个格式是正确的?

【答】 doing so无论在限定形式或非限定形式中，均可采用相反的顺序so doing。例如：

1. Roberts was rounding up the cattle. When asked why he was so doing，he replied： “Or-ders are orders.”(CGEL)

罗伯茨正在把牛圈起来。当问他为什么这样作时，他回答：“命令就是命令”。

2. People tend to amass possessions，sometimes without being aware of doing so.(NCE 3，L.59)

人们喜好积攒物品，有时却没有意识到这一点。

(参见do so/do it)