Auxiliary verbs provide additional grammatical and semantic information to main verbs. The three primary auxiliary verbs in English are to be, to do, and to have. Auxiliary verbs are used along with main verbs to form verb tenses and voices. For example, to be is used to form progressive and passive constructions, to have is used to form compound past tenses, and to do and did are used to form interrogative and negative forms. Modal auxiliary verbs like can, may, must express meanings like ability, permission, necessity. Auxiliary verbs are combined with main verbs to convey different meanings regarding actions, states of being, possession, and mood.

1. AUXILIARY VERB
What is it?
Is a verb that provides additional grammatical and semantic information to a
verb of full meaning.
What are they?
Auxiliary verbs are only three but very important: to be, to do and to have.
They are so called because they can be used separately as main verbs are used
as auxiliaries, is accompany any other verb, which is the main verb tenses to
build.
Example:
To Be Como verbo principal se traduce por "ser o estar"
You are happy (tú eres feliz)
You are ill (tú estás enfermo)
Como verbo auxiliar se traduce por "estar"
You are eating (tú estás comiendo)
To do Como verbo principal se traduce por "hacer"
I do many things (Yo hago muchas cosas)
Como verbo auxiliar no se traduce
Do you speak English? ¿Hablas inglés?
To have Como verbo principal se traduce por "tener"
I have a car (Yo tengo un coche)

2. Como verbo auxiliar se traduce por "haber"
I have eaten (Yo he comido)
How is it used?
TO HAVE: It is used for the formation of compounds of past times.
TO BE: It is used for progressive or continuous form and the passive voice.
Example:
I am eating apples, (estoy comiendo manzanas)
Hamlet waswrittenby Shakespeare, Hamlet (fue escrito por Shakespeare).
DO - DID: Aids are interrogative and negative forms of Present Simple and Past
Simple.
SHALL – WILL
a) Se usan para formar el futuro y sus pasados
Shall: Used for the first person singular and plural;
Will: Is used for the remaining.
b) En la forma interrogativa
Will you? equivale a ¿Quieres?
SHOULD - WOULD: Are used to form the conditional
Should: Used for the first person singular and plural
Would: Is used for the remaining.
LET: It is used for the third person singular and plural, and the plural of the
imperative first.

3. What is the point?
Used for the conjugation of other compounds verbs times ..
Main Verbs
What is it?
The verb is the fundamental element of a sentence. Main verb is called one who
is not subordinate to another.
What are they?
The verb "to be", the verb "to have" modal verbs "can, could, may, might,
should, must, oughtto" and auxiliary verbs "will" and "would". Here are
examples of these verbs translated into Spanish.
Examples:
Verbos Primarios
Verbo "to be" - ser o estar
I am / I was / I have been / I had been / I will be /
Verbo “to have” – haber o tener
I have / I had / I have had / I had had / I will have / …
Verbos Modales
Can - Puedo
I can dance
Could - podría / pude / podía / pudiera
I could dance if I could practice.

4. May - podría / quizás / puedeque
It may rain today.
Might - podría / quizás / puedeque
They might come tomorrow.
Must - debo / debo de
I must go. - She must be crazy
Should - debería / tendría que
I should study more
Ought to - debería / tendríaque
I ought to study more.
Verbos Auxiliares
Will - (convierte en futuro al verbo que le sigue)
I willspeak English.
Would - (convierte en potencial al verbo que le sigue)
I would speak English.
How is it used?
Verbs are words that indicate actions, existence (ser / estar), possession (have)
or mood.
What is the point?
These are used in combination with other verbs to express different degrees of
ability, possibility, permission, necessity, obligation, prohibition, safety, etc..,
Referring to the main verb.

5. BIBLIOGRAFIA:
http://www.shertonenglish.com/resources/es/main-verbs/to-have.php
http://www.escueladigital.com.uy/espaniol/verbos_aux.htm
http://recursos.cnice.mec.es/latingriego/Palladium/latin/esl221ca3.php
http://www.mailxmail.com/curso-ingles-principiantes/clasificacion-verbos-ingles
http://www.curso-ingles.com/gramatica-inglesa/verbos.php
http://www.aprenderinglesfacil.es/2008/10/verbos-modales-modals.html