了
le
(particle)
Marks a change. After a verb, the action is done: 我吃了 'I ate'. At the end of a sentence, something is now different: 下雨了 'it's started raining'.
In a story
Grammar with 了
了
Verb + 了 — completed action
太…了
太…了 — too / excessively
了
Sentence-final 了 — change of state
快要…了
快要…了 — about to
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