Matius 16:4

16:4 A wicked and adulterous generation asks for a sign, but no sign will be given to it except the sign of Jonah.” Then ¹  he left them and went away.

Matius 27:42

27:42 “He saved others, but he cannot save himself! He is the king of Israel! If he comes down ²  now from the cross, we will believe in him!

[16:4]  ¹ tn Here καί (kai) has been translated as “then” to indicate the implied sequence of events within the narrative.

[27:42]  ² tn Here the aorist imperative καταβάτω (katabatw) has been translated as a conditional imperative. This fits the pattern of other conditional imperatives (imperative + καί + future indicative) outlined by ExSyn 489.