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.
The largest category of regular Italian verbs are those that end in -are.
Verbs that end in -ere are the second category of regular Italian verbs.
Italian verbs that end in -ire are divided into two groups, both considered regular. The first group is smaller and has similar endings to regular -ere verbs.
Most regular Italian verbs that end in -ire require -isc- in four of their conjugations.