León, espero entender correctamente tu pregunta. El uso del verbo "to be" es básicamente el mismo que en español cuando usamos los verbos "ser" y "estar" (el 90% de las ocasiones). Ejemplos: She is tired = ella está cansada. He is a doctor = él es doctor. I was there this morning = yo estuve allí esta mañana. You were dancing = tú estabas bailando They will be here any minute = ellos estarán aquí en cualquier momento. We will be better tomorrow = seremos mejores mañana. Would you be so kind? = sería usted tan amable? We would be arriving at 4 = estaríamos llegando a las 4. Espero que eso te ayude.

The infinitive form of the verb is "to be". "Be" occurs without the "to" in the imperative and subjunctive in English. For example: Be good! Be quiet! Be gone! Don't be a pest! He will recover from his illness if it be God's will. Her father demanded that she be home by 11 pm. May these examples be of help to you.