comiéramoscomiésemos
Comiéramoscomiésemos is a reference to two alternative forms of the imperfect subjunctive (pretérito imperfecto de subjuntivo) for the nosotros form of the verb comer. The two standard conjugations are comiéramos and comiésemos, both functioning as the first-person plural in this mood and tense.
These forms are used in subordinate clauses that require the imperfect subjunctive, especially in past-tense contexts
Si comiéramos temprano, podríamos llegar a tiempo.
Quería que comiésemos juntos mañana.
Comiéramos is the more common variant in many varieties of Spanish and is widely used in everyday