The -aya Class
Verbs in the -aya class form stems by strengthening to the medium level and using the suffix aya. Consider the behavior of the root cur, meaning "steal":
This is straightforward; let's move on.
The -aya class with different suffixes
Any suffix that uses the connecting i vowel will always use i.
Note that the suffix itvā is used. If an -aya class root does not have a prefix, then its gerund form will use the verb stem, with the last a removed.
चुर् → चोरयित्वा
cur → corayitvā
steal → having stolen
Otherwise, the regular rules are followed.
Note that the suffix ita is used. The -aya class uses a medium-strength root in the PPP.
चुर् → चोरित
cur → corita
steal → stolen