tn The verb is תְּנוּ (ténu), literally “give.” The imperative is followed by an ethical dative that strengthens the subject of the imperative: “you give a miracle.”
tnHeb “and throw it.” The direct object, “it,” is implied.
tn The form is the jussive יְהִי (yéhi). Gesenius notes that frequently in a conditional clause, a sentence with a protasis and apodosis, the jussive will be used. Here it is in the apodosis (GKC323§109.h).