I got the idea from using Superspeed Numbers from Whole Brain Teaching. This is an extremely effective, 4 minute activity to help teach whatever verb you are focusing on. This will help teach Past tense verbs, present tense verbs, future tense verbs, and any other tense you want. It can also be used a study guide.
The students need to pair off and then using whatever verb you tell them to, they go through all the different subject pronouns, including the infinitive and the meaning. My kids groan and moan when I tell them it's time for Superspeed Verbs but the entire time the timer is running I hear laughter and see smiles and best of all; I hear them practicing in Spanish!