Mira las expresiones goin to y will son los que le dan a una oracion el futuro. Mira por ejemplo en las siguientes oraciones.
1.-I am going to run a marathon. (Voy a correr una marathon) 2.-I am going to swim
3.-You are going to dance
4.-She is going to sleep
5.-We are going to write
6.-I will be in The USA. (Yo estaré en los Estados Unidos)
7.-He will buy a car
8.-My mom is going to play basketball
9.-I will be a famous singer
10.-They are going to build a house