4 ms·"A Perl regexp, sure." is not part of the grammar of English because it lacks a verb.by petmon 5y ago"A Perl regexp, sure." is not part of the grammar of English because it lacks a verb.867-5309 5y agoperhaps you meant "does not follow". only the loose rules are "part of" besides, "it is" is implied in that sentence, so there's your verbxigoi 5y agoNatural languages don't have a formal grammar.