"Will" is used with promises or voluntary actions that take place in the future. "Will" can also be used to make predictions about the future. For more information on using "will" and associated exercises, visit the Simple Future section of our Verb Tense Tutorial.
I promise that I will write you every single day. promise
I will make dinner tonight. voluntary action
He thinks it will rain tomorrow. prediction
More Examples of "Will"
You can also use:
will future action,
The marketing director will be replaced by someone from the New York office.
Fred will be there by 8:00.
The marketing director will not be replaced after all.
Fred will not be there. He has a previous obligation.
I will take care of everything for you.
I will make the travel arrangements. There's no need to worry.