When you learn a new word it is highlighted. If you mouse over it you get a drop down menu. If it is a verb it will show the option of conjugating it for you. This will enable you to know which form to apply and when.
Specifically, je bois (I drink), tu bois (you drink)
F.W.I.W. when looking at the conjugation for a new verb I write it down on a flash card for reference until I become familiar with it. Which in the case of duolingo doesn't take long.