在〜 in the middle of ~ing
6 phrases在 before a verb marks an action in progress: 我在吃饭, I'm eating. It is the same 在 that means "at" a place, and the logic is the same - you are at the doing of it. 正在 is the emphatic form, right in the middle of it.
在 before a verb marks an action in progress: 我在吃饭, I'm eating. It is the same 在 that means "at" a place, and the logic is the same - you are at the doing of it. 正在 is the emphatic form, right in the middle of it.