Have y Have Got both express possesion. There is no difference in meaning but Have Got is less formal and only exists in the Present Simple Tense.

Tanto Have como Have Got expresan posesión. Significan lo mismo pero Have Got es menos formal y solo existe en Tiempo Presente Simple.

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To Have

To Have is a regular verb.

We almost never use the contraction so you can forget about it.

To Have es un verbo regular. Apenas usamos la contracción así que puedes olvidarlo.

Affirmative

I have a secret.

Tengo un secreto.

Negative

I don’t have a secret.

No tengo un secreto.

Question

Do you have a secret?

¿Tienes un secreto?

Short Answers

Yes, I do. / No, I don’t.

Negative Question

Don’t you have a secret?

¿No tienes un secreto?

Short Answers

Yes, I do, actually (De hecho). / No, I don’t.

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Have Got

Have got is less formal. Do not use it in formal writing. It is very common to use the contraction.

Have Got es menos formal. No lo uses en redacciones formales. Es muy común usar la contracción.

Affirmative

Long Form I have got a secret.

Contraction I’ve got a secret.

Translation Tengo un secreto.

Negative

Long Form I have not got a secret.

Contraction I haven’t got a secret.

Translation No tengo un secreto.

Question

Long Form Have you got a secret?

Contraction (None)

Translation ¿Tienes un secreto?

Short Answers

Yes, I have. / No, I haven’t.

Si, tengo. / No, no tengo.

Negative Question

Long Form Have you not got a secret?

Contraction Haven’t you got a secret?

Translation ¿No tienes un secreto?

Short Answers

Yes, I have actually. / No, I haven't.

Si, tengo(de hecho). / No, no tengo.