In English the Future Time is expressed in a number of ways. The most common are with will and be going to. See examples from the following sentences.
With be going to, make sure the verb be agrees with its subject. I’m going to eat a whole watermelon.
In speech, the words going to are often pronounced “ gonna .”Don’t forget the be verb.
What’s the difference between will and be going to?
Both can be used interchangeably in some cases. (Predictions and guesses)
Be going to is preferable for strong intentions or for describing the inevitable.
Will is the preferable form for making offers or expressing pop decisions.
Sometimes future time can be expressed with either the present or present progressive tense. In such cases, time words must be expressed or clearly implied.