后悔无及

Explanation: Regret that it was too late 　　Usage: Supplemental; for the predicate; means too late to regret 　　Source: Hengyu "Zuo Duke Ai six years": "de facto seeking men, and He has not made its first all? For regret, and also no." 　　Examples: Suffered a half-day just to hear him say "~", has already killed off gas. (Qing Li Ruzhen "Flowers in the Mirror," the ninety-seventh back) Thesaurus:  Mo and regret, No remorse and, Round go astray Knowledge back to, return to the fold; turn over a new leaf; return of the prodigal son, penance remorse, Lock the barn after the horse is stolen., wake up to the danger at last moment, Round go astray Known anti-, Fans make the right back, Anti-fan with knowledge, change quickly and completely contrition, Retreat neck-rein, regret in vain, Lock the barn after the horse is stolen., lock, etc the stable door after the horse has bolted try to prevent or avoid loss, damage, etc when it is already too late Antonym Group:  Without anti-fans, Fans not return