How do you say Be To in Irish Gaelic?

There isn't a single, direct translation of "be to" in Irish Gaelic because the meaning of "be to" depends heavily on context. It can express obligation, future intention, or a scheduled event. Here are some possibilities depending on the nuance:

* For obligation or something that *must* happen: `caithfidh` (must) + infinitive verb. For example, "I am to go" would be "Caithfidh mé dul" (I must go).

* For something that is planned or scheduled to happen: `beidh` (will be) + the appropriate verb in the future tense. For example, "The meeting is to be at 3" would be something like "Beidh an cruinniú ag a trí." (The meeting will be at three). You might also use a construction with a preposition and the future tense depending on the nuance.

* For a command or instruction: The imperative form of the verb. "You are to clean your room" would be "Glan d'seomra!" (Clean your room!).

To give you a more accurate translation, please provide the sentence where "be to" is used.