This future tense is used to refer to arrangements already made. They involve movement and have a set time as a signal word. (Will, Going to, Present Continuous, Present Simple)

I can´t see you at the weekend because I ___________ my grandparents.

To make predictions based on what we think we use:

To express on-the-spot decisions we use... (improvisional)

To make a prediction based on what we see we use: (Will, Going to, Present Continuous, Present Simple)

I ______________ right back!

Are you free tomorrow evening? We ________ a party.

The train _____________ at 9 o´clock tonight.

The sky is very dark. I think it ___________ .

When the waiter comes we ______ our food.

I'm sorry I made you so angry. I promise I _______ it again.

I promise you, I ______ anyone your secret.

Everything is already planned. We _____________ to Greece for Holidays next month.