Matthew 5:16

5:16 In the same way, let your light shine before people, so that they can see your good deeds and give honor to your Father in heaven.

Matthew 27:42

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

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.