Italian has a dozen verbs with an irregular infinitive that ends in -arre, a contraction of the original infinitive ending -aggere. Many conjugations for these verbs are based on that original infinitive.
Italian has about 20 verbs with an irregular infinitive that ends in -orre, a contraction of the original infinitive ending -onere. Many conjugations for these verbs are based on that original infinitive.
Italian has a few verbs with an irregular infinitive that ends in -urre, a contraction of the original infinitive ending -ucere. Many conjugations for these verbs are based on that original infinitive.
Italian future conjugations are relatively simple. Most regular verbs and many irregular verbs use their infinitive minus -e as the future stem, and there is a single set of future endings for all verbs.
The Italian imperative exists for 5 different grammatical people, though only 3 are commonly used. It’s conjugated by taking the infinitive of the verb, dropping the infinitive ending, and adding a new set of endings.
Italian has only 4 irregular –are verbs. Though they don’t share a conjugation pattern, it’s helpful to look at them side by side because there are many similarities.