正在 + Verb (in progress) vs Verb + 着 (persisting state)
正在 (zhèngzài) vs 着 (zhe) — action happening now vs a state that persists
正在 (zhèngzài, or just 在) sits BEFORE the verb to say an action is actively unfolding right now: 我正在吃饭 (I am [in the middle of] eating). 着 attaches AFTER a verb to show a state or posture that persists — often the backdrop for something else happening: 门开着 (the door is [in the state of being] open), 他坐着看书 (he's seated, reading — 着 marks that the sitting posture holds while the reading happens). The deciding question: is the sentence about an action unfolding dynamically right now (→正在 before the verb), or a state/posture being maintained, often as the background for another action (→verb + 着)? The two often combine: 他正在躺着看电视 (he's currently lying down watching TV) — 正在 says it's happening now, 着 says 'lying down' is the persisting posture.
Examples
- 我正在写作业。wǒ zhèng zài xiě zuò yè
I am (in the middle of) doing my homework.
- 墙上挂着一张地图。qiáng shàng guà zhe yì zhāng dì tú
A map is hanging on the wall.
- 他正在门口站着等你。tā zhèng zài mén kǒu zhàn zhe děng nǐ
He is currently standing at the doorway waiting for you.
Common mistake
✗ Wrong: 墙上正在挂一张画。
✓ Right: 墙上挂着一张画。
A static, unchanging state (a picture hanging on the wall) uses 着, not 正在 — 正在 signals a dynamic action unfolding right now, but hanging-in-place is a passive resulting state, not an ongoing activity.
Practice this pattern
Fill in the missing character:
我＿在写作业。
I am (in the middle of) doing my homework.