It is have not of!

[MyCatIsABiggerBastardThanYours]

Could have...
Should have...
Would have...

I know it has been said before and I also realise it is not the most important thing in the world, but heck this is Pedants corner so I am hoping I am amongst the equally annoyed.

Make it your one woman mission to never say should've, could've, etc.

If more people spoke in a way that didn't shorten, it would help this particular issue.

This is a problem of mishearing.

This drives me absolutely insane!!!
I see it all the time on Facebook even with people that revived a decent education.

Received not revived .... Bloody autocorrect.

Haha I didn't realise I was saying it wrong until my boyfriend asked me to repeat myself one day i write it properly but always say it wrong.

You are not alone....it really really gets one my nerve to...Probably my biggest pet hate.

To, two and too is another but I'm guessing that was just a typo!

I am with you op. Another one we're/ were, there/ their. It's really not that hard.

Another one we're/ were, there/ their. It's really not that hard.

It might be quite hard for someone with learning difficulties, like my son.

I am another. Would OF, could OF, should OF are very high on my list of pet hates. They are not even phrases.

It is HAVE.