Prediction in general
- One day you will be a great teacher.
- In the future we will travel to the Moon.
Express a voluntary action
- I will help you with your homework.
- Will you help me to carry the games?
To express a promise
- We will be always friends
- I won´t tell anyone your secret
No future in time clauses: when, while, after, before, etc.
- When you arrive we will start to play
- I will eat as soon as the movie finishes
Believe, sure, think
- I am sure you will win the match.
- She thinks he will give her a present