"ought to of have" is incorrect. ' ' as I ought ' and ' as I ought to've ' are not wrong.
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JJDouglasIs "ought to of have" ungrammatical?Yes, it's ungrammatical. Use "should have" instead.
JJDouglas On a related note, is "to've" an acceptable contraction?No.
teechrNo.Is there any reason why it's not acceptable. You can still say "to have", can't you?
JJDouglasIs there any reason why it's not acceptable.It's not standard in modern English; a century or two ago, it might have been.
JJDouglasYou can still say "to have", can't you?Of course! But that's not the same as "to've."