‘Would Of’ or ‘Would Have’?

When people say or write would of, should of, could of or might of, they really mean would have, should have, could have or might have. For example:

✅ I would have been an only child if it weren’t for IVF.

❌ I would of been an only child if it weren’t for IVF.

✅ You should have studied harder for the exam.