The verbs ser, estar and haber are irregular and used very frequently in Spanish.
PRESENT SER:
Yo soy
Tú eres
Él/ella/usted es
Nosotros/-as somos
Vosotros/-as sois
Ellos/-as son
USES OF THE VERB SER:
1. Identifying a person:
3. Nationality /origin:
4. Describing people and things:
5. Possession:
6. Definitions:
7. Asking for and responding about prices:
8. Asking for the date:
9. Time:
PRESENT TENSE OF THE VERB ESTAR.
Yo estoy
Tú estás
Él/ella está
Nosotros/-as estamos
Vosotros/-as estáis
Ellos/-as están
USES OF THE VERB ESTAR:
2. State:
THE VERB HABER
This irregular verb is used often in Spanish in the third person: Hay (there are).
USES OF HAY (THERE ARE)
To speak of the existence or non-existence of people, animals, objects and places.
Articles (el/la/los/las) or the possessive case (mi/mis, tu/tus, su/sus, nuestro/-a/-os/-as, vuestro/-a/-os/-as) are never used with this verb.