解释既有今日，何必当初
◎ 既有今日，何必当初 jì yǒu jīnrì,hébì dāngchū
[if there must be today,then why should there have been other days;if I had known it would come to this,Iwould have acted differently;if it has to be like this now,it's a pity it was even like that in the beginning] 既然有今日的如此结果,何必在当初那么做。用以感慨现今的不如意,而深悔过去的错误
宝玉在身后面叹道:“既有今日,何必当初。”——《红楼梦》
-----------------
国语辞典既已落到今日如此地步，当初又何必那么做？多用以表示悔意或指责他人。《红楼梦．第二八回》：「宝玉在身后面叹道：『既有今日，何必当初！』」
© 汉典
既有今日，何必當初 成语解释
【解释】既然现在后悔，当初为什么要那样做？。
【出处】宋·释普济《五灯会元·天衣怀禅师法嗣·惠林宗本禅师》：“曰：‘中下之流，如何领会？’师曰：‘伏尸万里。’曰：‘早知今日事，悔不慎当初。’”
【示例】宝玉在身后面叹道：“～？” ◎清·曹雪芹《红楼梦》第二十八回
© 汉典
既有今日，何必當初 网络解释
百度百科
既有今日，何必当初
© 汉典