use Modern::Perl qw/2015/;
use Lingua::EN::Conjugate qw/conjugate/;

while ( my $verb = <DATA> ) {
    chomp $verb;
    for my $pronoun (qw/I you he we you they/) {
        say conjugate(
            verb               => $verb,
            pronoun            => $pronoun,
            allow_contractions => 1,
            tense              => 'present',
        );
    }
    say '---------------------';
}

__DATA__
walk
hear
be
have
go
try
sing
may