#!/usr/bin/env perl

use 5.010;
use warnings;
use strict;

my @frags = qw{
                  "'frags'"
                  "'frags
                  frags'.
                  frag's.
                  frags.
                  frags'
          };

for my $frag (@frags) {
    print  "{$frag} : ";

    if ($frag =~ /\W'\w/) {                            #1
        print 'matched by first regex. ';
    }
    if ($frag =~ /\w'\W/) {                            #2
        print 'matched by second regex. ';
    }
    if ($frag =~ /\W'\w | \w'\W/) {                #3
        print 'matched by third regex. ';
    }
    say '';
}

##</code><code>##

{"'frags'"} : matched by first regex. matched by second regex.
{"'frags} : matched by first regex.
{frags'.} : matched by second regex.
{frag's.} :
{frags.} :
{frags'} :