With spanish ? explain how stem changing -ir verbs are different from stem changing -ar and -er verbs in the present subjunctive

Verbs in infinitive are those words that manifest actions and that are not determined by a time, whether present, past, future, or no other. This means that they indicate the moment in which the action is carried out, so the verbs in infinitive have no time, no person, no number, so they require another verb to complement themselves, in addition to always ending in "ar", "er", "ir".

There are hundreds of actions that can be performed, therefore, there are hundreds of verbs to name them.

However, however they start, all the verbs in Spanish end in one way: with the letter R. And according to the vowel that comes before, which can be an A, an E or an I, can be organized to the verbs in three groups: 

• The so-called verbs of first conjugation, which end in the syllable AR, such as "Estudiar, "Saltar"  and "Cocinar"

• The so-called verbs of second conjugation, ending in the syllable ER, such as "Correr", "Comer" and "Saber"

• The so-called third conjugation verbs, which end in IR, such as "Salir", "Escribir", and "Ir" (Go)

To conjugate a verb, we must separate its root from its ending or termination. The termination will be what we have already told you: AR, ER, or IR. Therefore, its root will be everything else. For example, in the verb disarm, its root is disarm and its ending ar. It is a verb of first conjugation.

Hope you understand!!

-Ana