To Do Is To Be --Socrates
To Be Is To Do --Plato
Do Be Do Be Do --Sinatra
to adverb, 1) in a direction toward preposition, 2) in the direction of 3) as far as 4) on or against
5) until 6) used to show why 7) used with the infinitive of a verb 8) for the purpose of, in order to 9) belonging to