Fourth conjugation imperfect -e

1. What are 4th conjugation verbs?
2. What is the difference between 3rd IO and 4th conjugation?

What are 4th conjugation verbs?

Fourth Conjugation Verbs have the infinitive ending in -ire. Note that -i is the characteristic vowel of the fourth conjugation in the present tense, changing to -iu in the 3rd person plural.

What is the difference between 3rd IO and 4th conjugation?

Except for that and a few long marks which are not mandatory because they do not distinguish forms in meaning, the only other significant difference between the third-io and fourth conjugations is found in the imperative singular in which third-io uses an -e ending (cape), whereas fourth uses an -i ending (audi).