Simple Future Tense:
Simple Future Tense is used to tell about things which we cannot control. It expresses the future as fact.
I shall be twenty next Month.
It will be Christmas in a week.
We will know our exam results in next two days.
We also use this tense to talk about what we believe will happen in the future. For example:
I think Australia will win the match today.
I’m sure you will get good grades in your exam.