HSK 2 grammar · particle
着
着 — ongoing state
Pattern
+
( ) can be left out · other words may come before, between and after
How it works
着 after a verb shows that a state stays on — a door standing open, a person holding something. It describes a lasting condition rather than a one-time action.
Examples
门开着。
Mén kāi zhe.
The door is open.
他手里拿着一本书。
Tā shǒu lǐ ná zhe yì běn shū.
He is holding a book in his hand.
Related

See it in a story
In the app, 着 is underlined wherever it appears in the stories you read, and practised with sentences from them. Free.