Regular Spanish verbs follow regular rules when they become present participles, verbs that end in -ing in English, and past participles, verbs that end in -ed or -en in English. The following tables show the rules for each verb form and offer examples.

Forming Present Participles
Verb Ending Rule Example Verb Present Participle
-ar stem + -ando hablar = to speak hablando = speaking
-er or -ir stem + -iendo comer = to eat comiendo = eating
vivir = to live viviendo = living
Forming Past Participles
Verb Ending Rule Example Verb Present Participle
-ar stem + -ado hablar = to speak hablado = spoken
-er or -ir stem + -ido comer = to eat comido = eaten
vivir = to live vivido = lived