Latin: Verbs. Sum - Present Indicative Quiz

Sum is perhaps the most important verb in the Latin language. It indicates possession, state, and existence, among others. It is used to form periphrastic conjugations. Do you know how to conjugate this verb?

Sum forte maius verbum latīnī. Inter alia indicat possessiōnem, status et essentiam quoque fōrmam auxiliaris. Scīs dēclīnātiō sua?