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了, 过 and 着: Chinese aspect markers explained

verb + 了 / 过 / 着

了 / 过 / 着 — completed / experienced / ongoing

Chinese has no tenses. These mark the shape of an action instead: 了 it completed, 过 it has been experienced at some point, 着 it is ongoing or a state that persists.

他已经走了。

Tā yǐjīng zǒu le.

He has already left.

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