Answer:
Past: ate, was
Present: is, eats
Future: will eat, will be
Explanation:
The past tense is used to describe events that have already happened on a temporal scale, and thus need to be referred to in the past tense. In English, the past tense conjugation is the same for I, you, he, she, we, and they.
The present tense refers to actions happening in the present or that happen in general. The present tense verbs change in the third persona singular form.
The future tense is used to refer to events or things that have not yet transpired but that are forecast or predicted. To from the future tense, the word will is added before the infinitive form of the verb.