HAVE is used with some pronouns and plural nouns:
'I have a great English teacher.'
'You have toothpaste on your chin.'
HAS
Has is used with the third person singular.
For example:
'She has a great personality.'
'He has a new haircut.'
usually it goes like this
I have = I've
you have = you've
we have = we've
they have = They've
he has = he's
it has = it's
since 'father' is a third person singular we use 'have'.
If u are still uncertain please check the link "http://www.ecenglish.com/learnenglish/using-have-and-has"
hope it helped!!!!!!!!
