%{/* * this sample demonstrates (very) simple recognition: * a verb/not a verb. */%}%%[\t ]+		/* ignore white space */ ;is |am |are |were |was |be |being |been |do |does |did |will |would |should |can |could |has |have |had |go		{ printf("%s: is a verb\n", yytext); }[a-zA-Z]+ 	{ printf("%s: is not a verb\n", yytext); }.|\n		{ ECHO; /* normal default anyway */ }%%main(){	yylex();}