был, есть и будет есть
There is a possible confusion for foreigners with the verb "to be" (быть) in Russian. Because the present tense of that verb - "есть" is exactly the same word for the present tense of the verb "to eat" - "есть"
However "to eat" have another word for it: "кушать"(past:кушал, future: буду кушать), which is more polite, generally