Blow Up By EvilJuly 10, 2013February 24, 2020Phrasal Verbs Blow Up 1)Blow up = to explode Ex: The bomb will blow up soon. present tense- The bomb is “blowing up.” past tense- The bomb “blew up.” 2)Blow (something) up = to blow air into something. Ex. I will “blow up the balloon.” present tense- I’m “blowing up the balloon.” past tense- I “blew up the balloon.” *Also, you can say “I blew up the balloon too much that the balloon blew up.” However it is more natural to say “the balloon popped.” BACK to Phrasal Verbs