The future tense of the verb ‘eat’ is ‘will eat’.
To form the future tense, we use the auxiliary verb ‘will’ followed by the base form of the main verb. In this case, ‘eat’ remains unchanged. So when you want to express an action that will happen in the future, you can say something like, ‘I will eat lunch at noon.’ This structure is commonly used to discuss plans or intentions that are set to occur later on.