if my father have it vs if my father has it

Some examples from the web:

• I wanted to know if my father was brought here.
• If my father says something shocking, don't pay attention.
• It would be true if my father were alive.
• If my father is in prison, then Philip will be killed.
• I wonder if my father's underground somewhere
• You must forgive him if my father is a little overenthusiastic about Mr Shinar.
• If my father knew it, they sent me home to Ohio.
• What if my father was stung by a scorpion, and the poison...
• If my father had plans for my family, he would have told us.
• If my father was murdered it must have been for his stories.
• Especially if my father was a chemistry teacher.
• Let me know if my father was a part of this murder.
• If my father had lived, everything would have been different.
• If my father wasn't like that...
• I wonder if my father would approve of the future he inspired.
• If my father becomes your enemy, he will destroy you.
• If my father were alive he wouldn't let that rumor spread around town.
• And maybe I'll get my chance, if my father can still muster the courage for battle.
• If my father becomes incapacitated, it all goes to me when I'm old enough.
• It's the best time to see if my father's alive.

Some examples from the web:

• I wanted to know if my father was brought here.
• If my father says something shocking, don't pay attention.
• It would be true if my father were alive.
• If my father is in prison, then Philip will be killed.
• I wonder if my father's underground somewhere
• You must forgive him if my father is a little overenthusiastic about Mr Shinar.
• If my father knew it, they sent me home to Ohio.
• What if my father was stung by a scorpion, and the poison...
• If my father had plans for my family, he would have told us.
• If my father was murdered it must have been for his stories.
• Especially if my father was a chemistry teacher.
• Let me know if my father was a part of this murder.
• If my father had lived, everything would have been different.
• If my father wasn't like that...
• I wonder if my father would approve of the future he inspired.
• If my father becomes your enemy, he will destroy you.
• Who knows if my father has waited for me?
• If my father were alive he wouldn't let that rumor spread around town.
• And maybe I'll get my chance, if my father can still muster the courage for battle.
• If my father becomes incapacitated, it all goes to me when I'm old enough.