語句
喺一件事上面做咩都唔能夠改變結果 regardless of what one does, the outcome of a matter will remain unchanged; futile
人都死咗咯，你怪責自己都於事無補㗎啦。
人都死咗咯，你怪责自己都于事无补㗎啦。
jan4 dou1 sei2 zo2 lok3, nei5 gwaai3 zaak3 zi6 gei2 dou1 jyu1 si6 mou4 bou2 gaa3 laa1. You couldn't revive the dead even if you drowned yourself with guilt.
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於事無補
Definitions (Wiktionary)
phrase, idiomatic
Synonym of 於事無補／于事无补 (yúshìwúbǔ, “unhelpful or useless to the situation”). (syn.) 於事無補, 于事无补