Have Got

Have got is similar to Have, they both mean the same. 


How to construct phrases with Have got.


AFFIRMATIVE:


I have a little sister. = I have got a little sister. / or / I've got a little sister.


INTERROGATIVE:


Do I have a little sister? = Have I got a little sister?


NEGATIVE:


I don't have a little sister. = I haven't got a little sister.


If someone asks you with 'have got' is better answer with 'have got'.


Person 1: Do you have a car?
Person 2: No, I don't. (Not: No, I haven't got)

Ps.: The third person of the verb TO HAVE is TO HAS.