Continuous State (着)

着 (zhe) is often compared to the English "-ing" form, but this is misleading. 着 does not describe an action in progress (that is 在 + verb). Instead, 着 describes a state that persists — the result of an action being maintained over time.

Compare: 她穿着红色的裙子 (She is wearing a red dress — describing the state of having the dress on) vs. 她在穿裙子 (She is putting on a dress — the action is in progress). With 着, the focus is on the continuing state; with 在, the focus is on the action happening right now.

着 is commonly used with posture and position verbs: 坐着 (sitting), 站着 (standing), 躺着 (lying down), 开着 (open/on), 关着 (closed/off). It also describes background states while another action occurs: 他听着音乐做作业 — "He does homework while listening to music." Here, the music is the continuous background state.

In negative form, use 没(有): 门没开着 (The door isn't open). The pattern 着 + 呢 adds emphasis on the ongoing nature: 门开着呢 (The door is open, you know / The door is still open).