中

中 is used to express that something is happening during or in the course of another ongoing action or situation. It often follows a verb in ている form or a noun indicating the time frame. It emphasizes that you are within the period of the action, rather than at its start or end. In natural use, 中 can combine with で/に to indicate location or context within which something occurs, and with 最中 to stress the exact middle of something.