【问】“Will she come with us?” asked Bill. “She’s not about to”，answered Mary.

be about to意为“就要”、“马上就要”，be not about to是否意为“就要不”、“马上不”。

【答】 be not about to是美国俗语，意为“不愿意”、“不打算”(very unwilling to)：

1. I’m not about to stop when I’m so close to success. (LDCE)

眼看就要成功了，我是不肯就此停顿下来的。

2. I’m not about to pay 50 dollars for a dress like that. (PEU)

我不愿意花五十美元买这样一件衣服。