"should have done"

[Jonathan Lighter]

I always thought this was a British construction. Do people say this in the U.S.?

  Bill : People made assumptions. I didn't correct them. I guess I should have done.

  Katherine : I guess you should have done.

                                                                --Movie, _Mona Lisa Smile_ (2003)

  I would never use "done" in this way.  "I guess you should have" is my idiom.

  What exactly is this construction called ?  Is it a post-Dickensian development ?

  JL


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