El pretérito perfecto negativo presenta dos formas:

Forma larga Sujeto + have/has + not + past participle + ...
Forma corta Sujeto + haven't/hasn't + past participle + ...

Sujeto + 've/'s + not + past participle + ...
Forma larga Forma corta
I have not worked I haven't worked I've not worked
You have not worked You haven't worked You've not worked
He has not worked He hasn't worked He's not worked
She has not worked She hasn't worked She's not worked
It has not worked It hasn't worked It's not worked
We have not worked We haven't worked We've not worked
You have not worked You haven't worked You've not worked
They have not worked They haven't worked They've not worked

Ejemplos

I haven't bought a launch. No he comprado una lancha.
You have not sent a postcard to your friends. No has enviado una postal a tus amigos.
He hasn't talked to her since yesterday. No he hablado con ella desde ayer.
She has not watched 'Titanic' yet. Ella no ha visto "Titanic" todavía.
It hasn't snowed since 1980. No ha nevado desde 1980.
We have not had breakfast. No hemos desayunado.
You haven't cleaned your rooms. No habéis limpiado vuestras habitaciones.
They have not done the laundry. No han hecho la colada.
He's not gone. No se ha ido.

Ejercicios

1 Completa las siguientes oraciones usando la forma larga del presente perfecto del verbo subrayado en forma negativa:

1 John, you send this letter yet.

have not sent

2 The neighbours complain about the construction.

have not complained

3 Our friend Peter give me the nicest bracelet.

has not given

4 I break up with my boyfriend.

have not broken

5 Your brother know him for many years.

has not known

2 Completa las siguientes oraciones usando las formas contraídas del presente perfecto del verbo subrayado en forma negativa:

6 The kid break the vase, the dog did it.

hasn't broken

7 My sister ride the horse yet.

hasn't riden

8 You speak to him about that.

've not spoken / haven't spoken

9 We let our son go to the party.

've not let / haven't let

10 It be easy to get here.

's not been / hasn't been

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Rodriguo

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