Please, could you give me some advice as for where on the Internet I could find some information about Discourse functions (in English Syntax).
Thank you very much
But here's a start:
The Discourse Functions of Sentences @ The Internet Grammar of English
[I don't think, on the basis of the filename - "...discours.html" - that this was written by a Francophone. Many old file-naming systems - including early versions of Microsoft Windows - imposed a limit of 8 characters before the "." . (I remember the fuss that was made in the mid-'90s when Windows 95 allowed longer filenames.]