Linux cp with a regexp

Question

I would like to copy some files in a directory, renaming the files but conserving extension. Is this possible with a simple cp, using regex ?

For example :

Answer 1

Suppose you have myfile.a, myfile.b, myfile.c:

for i in myfile.*; do echo mv "$i" "${i/myfile./newname.}"; done

This creates (upon removal of echo) newname.a, newname.b, newname.c.