Final answer:
Spanish infinitives are divided into two parts: the stem and the ending. The endings can be -ar, -er, or -ir corresponding to different conjugation classes.
Step-by-step explanation:
Spanish infinitives are typically divided into two parts: the stem and the ending. There are three possible endings for regular infinitives, which correspond to the three conjugation classes: -ar, -er, and -ir. For example, in the infinitive hablar ('to speak'), habl- is the stem and -ar is the ending. The stem contains the base meaning of the verb, while the ending provides information about the verb's conjugation pattern.