你好, Imagine you are supposed to meet a friend, you wait, and they do not show up. You put on your jacket, rise from where you are sitting, and suddenly, there they are. Would you say? 1 我即将离开 2 我正要离开 There are plenty of hits for both, but even more for 2. My guess is that 2 is more informal because of 要. Any comments/elaborations/explanations/clarifications/corrections welcome. 谢谢!