If the blind lead the blind, both shall fall into the ditch.

盲人引導盲人，兩人皆摔入坑。

It is no use crying over spilt milk .

為灑出去的牛奶惋惜是無用的。

It is too late tp lock the stable door when the steed had fled.

馬逃跑後再鎖柵門已來不及。