The main use of the Future Simple is to express what will happen or may occur after now.

Examples:

Affirmative form:

• Visitaremos cinco países (We will visit 5 countries)
• Esos empleados trabajarán hasta las 9 pm (Those employees will work until 9 pm)
• El año entrante empezaré mi proyecto (Next year I will start my project)
• El gerente y sus socios celebrarán el aniversario con una fiesta de gala (The manager and his partners will celebrate the anniversary with a gala celebration)

Negative form:

• No visitaremos cinco países (We will not visit 5 countries)
• Esos empleados no trabajarán hasta las 9 pm (Those employees will not work until 9 pm)
• El año entrante no empezaré mi proyecto (Next year I will not start my project)
• El gerente y sus socios no celebrarán el aniversario con una fiesta de gala (The manager and his partners will not celebrate the anniversary with a gala celebration)

The future with GOING TO is more informal and it has this syntax: IR + A + INFINITIVE.

Examples:

Affirmative form:

• Lloverá mañana (It is going to rain tomorrow)
• Voy a comer mariscos esta noche (I am going to eat seafood tonight)
• Ellos van a construir el puente (They are going to buld the bridge)
• Mi mamá, mi hermano y yo vamos a tomar clases de natación la semana entrante (My mom, my brother and I are going to take swimming lessons next week)

Negative form:

• No lloverá mañana (It is not going to rain tomorrow)
• No voy a comer mariscos esta noche (I am not going to eat seafood tonight)
• Ellos no van a construir el puente (They are not going to buld the bridge)
• Mi mamá, mi hermano y yo no vamos a tomar clases de natación la semana entrante (My mom, my brother and I are not going to take swimming lessons next week)

The Future Simple conjugation of the model regular verbs (ar, er, ir) is:

The Future Simple conjugation of the model regular verbs (ar, er, ir) with GOING TO is: