Ser is a Spanish irregular verb meaning to be. Ser appears on the 100 Most Used Spanish Verbs Poster as the #1 most used irregular verb.
For the preterite tense conjugation, go to Ser Preterite Tense Conjugation.
Ser Conjugation: Present Tense
*Irregular forms in bold.
The participio of Ser is sido. The present perfect tense is formed by combining the auxiliary verb haber with the participio.
The gerundio of Ser is siendo. The present continuous tense is formed by combining the auxiliary verb Estar with the gerundio.
Regular vs. Irregular Verbs
A verb is called a regular verb when its conjugation follows a typical pattern. A verb which does not follow these patterns exactly is called an irregular verb. In Spanish, the 3 regular patterns are for verbs ending in ar, er, and ir.
Spanish Conjugation Chart
Looking for more verbs like Ser? Check out our Spanish Conjugation Chart, the 100 Most Used Spanish Verbs Poster!