Difference in meaning: "would have had to be" vs "would have had to have been"


Being a non native speaker, I cannot spot the difference here:



  • He would have had to have been there.

  • He would have had to be there.


The only thing that comes to my mind is that in the first case, there is the past infinitive which would imply that it requires him to have been there (before something), while in the second case it requires him to be there at that moment.




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