Present participle; Past participle - heehawing - heehawed Present - heehaw - heehaw - heehaws - heehaw - heehaw - heehaw Past - heehawed - heehawed - heehawed - heehawed - heehawed - heehawed Future - will heehaw - will heehaw - will heehaw - will heehaw - will heehaw - will heehaw Present conditional - would heehaw - would heehaw - would heehaw - would heehaw - would heehaw - would heehaw Present Perfect - have heehawed - have heehawed - has heehawed - have heehawed - have heehawed - have heehawed Past Perfect - had heehawed - had heehawed - had heehawed - had heehawed - had heehawed - had heehawed Future Perfect - will have heehawed - will have heehawed - will have heehawed - will have heehawed - will have heehawed - will have heehawed Past conditional - would have heehawed - would have heehawed - would have heehawed - would have heehawed - would have heehawed - would have heehawed Imperative - - - heehaw - - - - - - - -