Double progressives?

[Mark A. Mandel]

This appeared on the LINGUIST List, and I thought it might not be out of
place on ADS-L as well. It's probably best to reply to the questioner.

   Mark A. Mandel : Dragon Systems, a Lernout & Hauspie company
          Mark_Mandel at dragonsys.com : Senior Linguist
 320 Nevada St., Newton, MA 02460, USA : http://www.dragonsys.com

>>>>>
     Date: Sun, 20 May 2001 17:02:24 +0100
     From: jlc115 <jlc115 at york.ac.uk>
     Subject: Double progressives?

Some dialects of English allow the use of double aspectuals:

1. He could have not have gone.

Some American English dialects allow double modal constructions:

2. He might could have gone.

I was wondering if there are any dialects that allow double progressives?

Thanks.