Definitions
- 1. (coll.) all day long
- 2. all the time
Word relationships
Usage notes
Common mistakes
Learners often misuse 成天 to mean 'every day' (天天) or 'always' (总是). It specifically conveys the duration 'all day long'.
Formality
成天 is colloquial; avoid in formal writing or speech. Use 整天 for neutral tone.
Example Sentences
1 shown他 成天 玩游戏。
He plays games all day long.
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