Aunque estos verbos también se emplean como verbos plenos, en su función de auxiliares contribuyen a la formación de algunos tiempos verbales.
– Be
Present Tense Past Tense Part Participle -ing form
I am we are I was we were
You are you are you were you were been being
He/she/it is they are he/she/it was they were
– Contracciones
I´m = I am isn´t = is not
He´s/she´s/it´s = he is/she is/it is aren´t = are not
You´re/we´re/they´re = you are/we are/they are wasn´t = was not
Weren´t = were not
– Do
Present Tense Past Tense Past Participle -ing form
I do we do
You do you do did done doing
He/she/it does they do
Contracciones
Don´t = do not doesn´t = does not didn´t = did not
– Have
Present Tense Past Tense Past Participle -ing form
I have we have
You have you have had had having
He/she/it has they have
– Contracciones
I´ve/you´ve = I have/you have he´s/she´s/it´s = he has/she has/it has
We´ve/they´ve = we have/they have
I´d/you´d = I had/you had he´d/she´d/it´d = he had/she had/it had
We´d/they´d = we had/they had
Haven´t = have not hasn´t = has not hadn´t = had not
– Funciones
Mary is cooking dinner at the moment Present Continuous (referencia al presente)
We´re having a party tomorrow Present Continuous (referencia al futuro)
The mobile was made in China Passive
Do you still walk to work? Present Simple (interrogación)
I don´t know Present Simple (negación)
Did she go to London last week? Past Simple (interrogación)
He didn´t play on Saturday. Past Simple (negación)
Tony has just arrived. Present Perfect
He´s been learning English for two years. Present Perfect Continuous
Have you ever seen the Queen? Present Perfect (Interrogación)
He had already left when I arrived. Past Perfect