Wow. I put «You are eating apples and drink milk.» and got marked incorrect (because it has to apparently be both eating and drinking in the same sentence or eat and drink, rather than you eat A and are drinking M, rather than you are eating A and drink M). Oh the flexibility of contextual-translations...
That's a good one because "drink" is in fact more regular (есть has weird present-tense forms).
So non-past endings are added to пь-. The past forms are formed by removing -ть and attaching -л / -ла / -ло/ -ли just like for almost any other verb.