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杯子破了。
The glass got broken.
To become damaged, cracked, or no longer intact.
衣服破了一个洞。
The clothes have a hole in them.
手机屏幕破了。
The phone screen is cracked.
Commonly used for objects losing their physical integrity.
破了 follows the pattern of resultative complements in Chinese, where the verb + 了 indicates the completion of a state change. Similar examples: 吃饱 (chī bǎo, 'ate until full'), 看完 (kàn wán, 'finished watching').
破了 is the resultative complement form of 破 (pò, 'to break/crack') with the perfective particle 了 (le), indicating completion of the action. It emphasizes the state of being broken rather than the act of breaking.