I have learned that 'If I have had p.p,..structure' is not acceptable but I have seen have had p.p structure like 'He seemed to have had disappeared' and then what the difference is between 1) He seemed to have had disappeared. 2) He seemed to have disappeared.
And have you never seen and used 'If I have had p.p structure' and do you also agree with that?
Thank you so much as usual for your help in advance.
Top answer
Only #2 is correct. Have + had + past participial is not possible.
— RandomGuy
Only #2 is correct.
Have + had + past participial is not possible.
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