In Spanish, -er and -ir verbs are regular verbs that follow specific conjugation patterns in the present tense. Here is a breakdown of how they are conjugated in the singular and plural forms for the 1st, 2nd, and 3rd persons:

-ER Verbs (Example: comer – to eat)
| Person | Singular | Plural |
|---|---|---|
| 1st Person | yo como | nosotros/as comemos |
| 2nd Person | tú comes | vosotros/as coméis (informal, used mainly in Spain) |
| 3rd Person | él/ella/usted come | ellos/ellas/ustedes comen |
-IR Verbs (Example: vivir – to live)
| Person | Singular | Plural |
|---|---|---|
| 1st Person | yo vivo | nosotros/as vivimos |
| 2nd Person | tú vives | vosotros/as vivís (informal, used mainly in Spain) |
| 3rd Person | él/ella/usted vive | ellos/ellas/ustedes viven |
Breakdown of Conjugation
1st Person Singular: yo (I) + verb stem + -o (e.g., como from comer, vivo from vivir)
2nd Person Singular: tú (you, informal) + verb stem + -es (e.g., comes, vives)
3rd Person Singular: él/ella/usted (he/she/you formal) + verb stem + -e (e.g., come, vive)
1st Person Plural: nosotros/as (we) + verb stem + -emos (for -er verbs) or -imos (for -ir verbs) (e.g., comemos, vivimos)
2nd Person Plural: vosotros/as (you all, informal in Spain) + verb stem + -éis (for -er verbs) or -ís (for -ir verbs) (e.g., coméis, vivís)
3rd Person Plural: ellos/ellas/ustedes (they/they/you all formal) + verb stem + -en (e.g., comen, viven)
This is the conjugation for regular verbs in the present tense. If you need examples with different verbs or other tenses, feel free to ask!