Another common way to represent future time is with a present indicative conjugation of "ir", followed by "a", followed by an infinitive verb: "Voy a viajar a Bolivia en el verano" ("I'm going to travel to Bolivia in the summer"). The difference between the use of the two forms varies according to dialect, but the ""ir a" + " construction tends to be more colloquial. Also, this construction—unlike the simple future form—is not used in the "probability" sense to express conjecture.