The future

We have to many ways to say a thing in the future. Here are the uses: 

1. For a definite future arrangement with someone.

· I’m having fun this evening.

Here we use the present continuous.




2. For an action in progress in the future

· I’ll be studying teaching for 5 years.

We use will.



3. For a decision about the future in our control or a prediction based on evidence.

· I’m going to study medicine.

We use be going to.



4. For a prediction, or a spontaneous decision.

- It probably will rain.

We use will.




5. For a future event fixed by a schedule. As it is a routine, we use the present simple as future.

· The bus leaves at 10am.

The bus has always the same schedule.

-> Great explanation! <- LINK