conjugation.present.irregular-ser
Ser in the present: soy, eres, es
Fully irregular: soy, eres, es, somos, sois, son. The vos form is sos.
conjugationA1standardinternally_reviewedv1.0.0
Explanation
Ser is suppletive — its forms come from different Latin verbs — so nothing about the present can be derived from the infinitive: soy, eres, es, somos, sois, son.
In voseo regions the form is vos sos (not *vos eres): sos boliviano, sos muy amable.
Ser expresses identity, origin, profession, time, and inherent characteristics; for states and location, Spanish uses estar — see the ser vs estar rule.
Examples
Soy ingeniero.
I'm an engineer.
I'm an engineer.
Region: global
Son las tres de la tarde.
It's three in the afternoon.
It's three in the afternoon.
Region: global
Vos sos de Tarija, ¿no?
You're from Tarija, right? (voseo)
You're from Tarija, right? (voseo)
Region: global