will
One of the most common ways to talk about the future is with will, for example: I will call you tonight.We often call this the "future simple tense", but technically there are no future tenses in English. In this construction, the word will is a modal auxiliary verb.
Here are the three main ways that we use will to talk about the future.
No plan
We use will when there is no prior plan or decision to do something before we speak. We make the decision at the time of speaking. Look at these examples:
• Hold on. I'll get a pen.
• We will see what we can do to help you.
• Maybe we'll stay in and watch television tonight.
In these examples, we had no firm plan before speaking. The decision was made at the time of speaking.
We often use will with the verb think:
• I think I'll go to the gym tomorrow.