Verbs - Classes
Verbs are separated into classes depending on endings of their infinitives.
Once a person is familiar with the classes, they then learn how to conjugate
the verbs in each class.
In Spanish, there are -ar verbs, -er verbs, and -ir verbs.
The perceptive student will quickly notice that -er and -ir verbs share many features.
In French, verbs can be put into three categories: -ir, -er and -re.
Many German verbs end with -en. Some end with -ieren. Conjugation of German verbs depends on whether the verbs are "strong" or "weak".
In Portuguese, there are -ar verbs, -er verbs, and -ir verbs.