You already can produce sentences like ji turi (she has), jis kalba (he speaks). However, ideally, you want to say what you are talking about. You can do that because you already know the word for it, which is tai.
Just a small caveat: the word for it tends to sneak in the middle so you have she it has instead of she has it. Try that:
Whenever you have two verbs in the same sentence (as in I can have it), the word tai sneaks in the middle between these two verbs. Thus you can say: