Question on French Imparfait ..?

[satori.dude]

How come in the imparfait, when you already conjugate a verb, the next one goes in the past as well?

E.g. Le prophete a dit qu'il [etait destine] a mourir.

Etre is already conjugated as etait.. so why isn't destiner in the infinitive?

[? Laoure ?]

That's the rule of the "imparfait": You use either the verb "avoir" or "être", depending on your verb, then you conjugate the verb you're using in the "passé" form.
ex: Je suis partit
Je l'ai trouvée
Je suis affamée
Elles ont trouvées (la valise)

**If you notice, that "other verb" that's conjugated right before is always either the verb "avoir" or "être." Those are sort of the "base verbs."