Conjugating Spanish commands is so similar to conjugating the Spanish subjunctive that the two verb tenses look a lot like twins and in most cases, the they are.
The family relationship between the Spanish Subjunctive and Spanish Commands breaks down like this:
The Identical Quadruplets:
The Spanish Subjunctive
The Usted Command ( both positive and negative)
The Ustedes Command ( both positive and negative)
The Tú Command ( Negative only)
These guys all are conjugated the same way ( put in yo form. Chop off the O. Add the ER present tense ending if it is an AR verb or add the AR present tense ending if it is an ER or IR verb)
These guys all have the same irregular verbs which are Dar, Ir, Estar, Saber, and Ser.
These guy all follow the CAR GAR ZAR spelling changes.
The Fraternal Twin
The Nosotros/as commands are just like the above with the exception of one strange quirk. The positive command for the verb Ir is VAMOS and the negative IR command is NO VAYAMOS.
The Family Bastard
The Tú positive command is a bastard in two important ways. First, it has a conjugation that defies logic ( conjugate by using whatever the present usted form of the verb is). Then, it has 8 crazy irregular verbs.
Spanish Subjunctive/Spanish Command Family Tree
The Bastard of the Family
