Gramatic

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aGramática - Have to - obligación en inglés
Se usa 'have to' para expresar obligación en inglés. Su uso es muy frequente. Abajo hay las regalas y unos consejos para usarlo corectamente. Despues hay un ejercicio con las respuestas para practicarlo.

SE FORMA: con have to + el verbo infinitivo: ver las diferentes formas abajo

AFIRMATIVO
I have to
you have to
he/she/it has to
we have tothey have to

NEGATIVO
I don´t have to
you don´t have to
he/she/it doesn´t have to
we don´t have to
they don´t have to

INTEROGATIVO
do you have to
does he/she/it have to
do we have to
do they have to

Ejemplos:
I have to work everyday. (tengo que trabajar todos los dias)
I don´t have to work everday. ( no tengo que trabajar todos los dias)
Do you have to work everyday? (¿tienesque trabajar todos los dias?)

SE USA:
Para decir que algo es necesario.

Tips (Consejos)

Si el sujeto es he/she/it se usa has en vez de have excepto en preguntas y negativos

ejemplos:
He has to work everyday. (tiene que trabajar todos los dias)
negativo : He doesn´t have to work everyday. (no tiene que trabajar todos los dias).

Para preguntas se usa el verbo auxilliar do or does+sujeto + have to + verbo infinitivo
(ver hacer preguntas en inglés)

ejemplos:
Do you have to work everyday? (¿tienes que trabajar todos los dias?)
Does he have to work everyday?(¿tiene que trabajar todos los dias?)
Present Simple |
Affirmative     | Interrogative     | Negative     |
I hasto. You hasto.He/She/It hastoes.We hasto.You hasto.They hasto. | Do I hasto?Do you hasto?Doeshe/she/it hasto?Do we hasto?Do you hasto?Do they hasto? | I do not hasto. You do not hasto. He/She/It does not hasto. We do not hasto. You do not hasto. They do not hasto. |

Present Simple Continuous |
Affirmative     | Interrogative     | Negative     |
I am hastoing. You are hastoing.He/She/It is hastoing.We are hastoing.You are hastoing.They are hastoing. | Am I hastoing?Are you hastoing?Ishe/she/it hastoing?Are we hastoing?Are you hastoing?Are they hastoing? | I am not hastoing. You are not hastoing. He/She/It is not hastoing. We are not hastoing. You are not hastoing. They are not hastoing. |

Present Perfect |
Affirmative     | Interrogative     | Negative     |
I have hastoed. You have hastoed.He/She/It has hastoed.We have hastoed.You have hastoed.They have hastoed. |Have I hastoed?Have you hastoed?Has he/she/it hastoed?Have we hastoed?Have you hastoed?Have they hastoed? | I have not hastoed. You have not hastoed. He/She/It has not hastoed. We have not hastoed. You have not hastoed. They have not hastoed. |

Present Perfect Continuous |
Affirmative     | Interrogative     | Negative     |
I have been hastoing. You have been hastoing.He/She/It has beenhastoing.We have been hastoing.You have been hastoing.They have been hastoing. | Have I been hastoing?Have you been hastoing?Has he/she/it been hastoing?Have we been hastoing?Have you been hastoing?Have they been hastoing? | I have not been hastoing. You have not been hastoing. He/She/It has not been hastoing. We have not been hastoing. You have not been hastoing. They have not been hastoing. |Past Simple |
Affirmative     | Interrogative     | Negative     |
I hastoed. You hastoed.He/She/It hastoed.We hastoed.You hastoed.They hastoed. | Did I hasto?Did you hasto?Did he/she/it hasto?Did we hasto?Did you hasto?Did they hasto? | I did not hasto. You did not hasto. He/She/It did not hasto. We did not hasto. You did not hasto. They did not hasto. |

Past Continuous |
Affirmative    | Interrogative     | Negative     |
I was hastoing. You were hastoing.He/She/It was hastoing.We were hastoing.You were hastoing.They were hastoing. | Was I hastoing?Were you hastoing?Was he/she/it hastoing?Were we hastoing?Were you hastoing?Were they hastoing? | I was not hastoing. You were not hastoing. He/She/It was not hastoing. We were not hastoing. You were not hastoing. They were...
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