⒈ 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。
英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;
⒈ 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。
引《红楼梦·第二八回》：「宝玉在身后面叹道：『既有今日，何必当初！』」