1. To conjugate : With Verbs,
conjugation refers to how a verb changes to show a different person & number, tense, or mood.

2. ¿Qué es un verbo? a word that is
1- usually the grammatical center of a predicate and
2- expresses an act, occurrence, or state of being and
3- that in various languages CHANGES (as for agreement with the subject or for tense) 

3. to plus a verb ¿Qué es un infinitivo?
En inglés : An infinitive is a verb consisting of the word
to plus a verb
( it’s a verb in the simplest form : no subject)
to be
Do we say I to be …. NO we say I am
to speak, to eat, to write……

4. ¿Qué es un infinitivo? En español , INFINITIVES
are also a verb in its simplest form : no subject
are recognized by their ending.
Spanish infinitives end in
hablAR =to speak
comER =to eat
escribIR =to write

5. When we study verbs you will learn that
1- verbs have a STEM and an ENDING
HABL(STEM) AR(ENDING)
2- when we CONJUGATE a verb,
First, separate the stem from the ending
Second, we give the verb different endings depending on the subject
3- verbs have TENSES : present-past – future, etc
4- VERBS have MOODS : indicative, imperative, etc..
5- verbs have PATTERNS
6- verbs are either REGULAR(follow the same pattern) or IRREGULAR(follow a different pattern)

7. Our first verb to study is SER =to be
SER is an ER ending verb
but SER is an IRREGULAR verb.
Ser is irregular because
Does NOT follow the pattern of REGULAR ER verbs
You must memorize the forms of the verbs

9. the conjugation of SER
SIINGULAR
PLURAL YO
NOSOTROS/AS Tú
VOSOTROS/AS
ÉL,ELLA, USTED
ELLOS,ELLAS, USTEDES
SOMOS
SOY
SOIS
ERES ES
SON
1- separate the stem “S” and discard the ER ending
2-ADD the new endings for each subject.

10. USES OF SER ÉL ES mi hermano. (He is my brother.)
1- ORIGIN = SUBJECT + SER CONJUGATION + DE + PAĺS YO SOY DE PUERTO RICO
2- TO IDENTIFY PEOPLE AND THINGS
¿QUIÉN ES ÉL? (Who is he?)
ÉL ES mi hermano. (He is my brother.)
¿QUÉ ES? (What is it?)
ES UN MAPA DE ESTADOS UNIDOS. (It is a map of the U.S.)

11. USES OF SER use the verb SER + preposition DE or POSSESSIVE ADJECTIVES
POSSESSION ( WHAT BELONGS TO SOMEONE) To express possession in Spanish you
use the verb SER + preposition DE or POSSESSIVE ADJECTIVES
Whose book is it? ¿De quién ES el libro?
It IS Mary’s book. = El libro ES DE MARY
Whose are they? = ¿ De quien son ?
They are the girl’s pencils. = Los lápices son de la chica.
She IS MY SISTER. = ELLA ES MI HERMANA.
There is absolutely no (apostrophe) ‘S en español.

12. On a side note When DE is followed by the definite article EL
(as in el libro de el estudiante)
The two words DE + EL are combined to form DEL
(as in el libro DEL estudiante)
DOES NOT HAPPEN WITH LA – LOS or LAS .

13. USES OF SER TO EXPRESS PROFESSION or OCCUPATION
She is a teacher. My father is a dentist.
Ella es maestra. Mi padre es dentista.
Unlike English, in Spanish , we do not use the INDEFINITE ARTICLE UN/UNA after SER before a PROFESSION
UNLESS
THERE IS A DESCRIPTION OF THE PROFESSION.
Ella ES UNA BUENA maestra.