Surprise!
These are all progressive tenses.
What is present, past, future, and conditional progressive?
Describe the present progressive tense
What is an action happening now?
Describe the future progressive tense
What is an event that will be happening?
What are direct object pronouns?
This is how stem changing verbs work.
What applies to only ir verbs and only keeps the first vowel given?
Describe the past progressive tense
What is an action that happened previously?
Describe the conditional progressive tense
What is an event that would be happening?
This is what DOPs do (two question answer).
What is used to replace direct objects with a pronoun? What is used to avoid repetition of verbs?
This is how a spell changing verb works
What applies to double vowel verbs and can change i->y?
These are all the estar verbs in the present progressive tense
What is estoy, estás, está, estamos, están?
These are all the estar verbs in the future progressive tense
What is estaré estarás estará estaremos estarán?
me te lo la nos los las
This is an example of irregular present participle
What is ir=yendo and poder=pudiendo
These are all the estar verbs in the past progressive tense
What is estuve, estuviste, estuvo, estuvimos, estuvieron?
These are all the estar verbs in the conditional progressive tense
This is where the direct object pronoun goes.
What is before the verb or attached to the end?