"Jeon will play on Saturday."
In the sentence "Jeon will play on Saturday," the word "will" serves as an auxiliary verb, specifically a modal auxiliary verb. The main functions of "will" in this sentence are:
Expressing Future Tense: "Will" is commonly used to indicate future actions. In this case, it conveys that Jeon's playing is scheduled to happen on the upcoming Saturday.
Making Predictions or Statements of Intention: "Will" can also be used to express predictions or statements of intention. In your sentence, it suggests that it is likely or intended for Jeon to play on Saturday.
So, in summary, "will" in your sentence helps indicate the future timing of Jeon's playing and conveys a sense of intention or prediction.
Jeon ..... play on saturday (WILL, SHALL)