Seguramente recordarás que ya hemos visto el verbo  TO HAVE en sus dos formas. Realizaremos un pequeño repaso de estos.

1) El verbo TO  HAVE cuyo significado es TENER. Ejemplo:

They  have a small dog

They  don't have a small dog

Do they have a small dog?

Yes, they do  / No, they don't

2)  El verbo TO HAVE GOT cuyo significado también es TENER. Ejemplo:

They have got a small dog

They have not (haven't) got a small dog

Have they got a small dog?

Yes, they have  /  No, they haven't

Ahora bien, existe una nueva acepción cual es HAVE TO cuyo significado demuestra necesidad  o firme obligación. En castellano se podría traducir como - TENER QUE (como obligación) y necesariamente deberá estar acompañada de otro verbo en infinitivo. Ejemplos:

Yo debo estudiar hoy = I have to study today

Ella debe ir al médico = She have to go to the doctor

Oraciones afirmativas

1) I have to learn Spanish

2) You have to be early tomorrow

3) Peter has to invite his friends

4) Mary has to cut her long hair

5) The dog has to be washed

6) We have to take a long break

7) You have to drink some coffee

8) They have to work on time

Oraciones negativas

1) I don't have to learn Spanish

2) You don't have to be early tomorrow

3) Peter doesn't have to invite his friends

4) Mary doesn't have to cut her long hair

5) The dog doesn't have to be washed

6) We don't have to take a long break

7) You don't have to drink some coffee

8) They don't have to work on time

Oraciones interrogativas

1) Do you have to learn Spanish?  Yes, I do / No, I don't

2) Do you have to be early tomorrow?  Yes, I do / No, I don't

3) Does Peter have to invite his friends?  Yes, he does / No, he doesn't

4) Does Mary have to but her long hair?  Yes, she does / No, she doesn't

5) Does the dog have to be washed?  Yes, it does / No, it doesn't

6) Do we have to take a long break?  Yes, we do  / No, we don't

7) Do you have to drink some coffee?  Yes, you do / No, you don't

8) Do they have to drink some coffee?  Yes, they do / No, they don't