Present participle; Past participle - attesting - attested Present - attest - attest - attests - attest - attest - attest Past - attested - attested - attested - attested - attested - attested Future - will attest - will attest - will attest - will attest - will attest - will attest Present conditional - would attest - would attest - would attest - would attest - would attest - would attest Present Perfect - have attested - have attested - has attested - have attested - have attested - have attested Past Perfect - had attested - had attested - had attested - had attested - had attested - had attested Future Perfect - will have attested - will have attested - will have attested - will have attested - will have attested - will have attested Past conditional - would have attested - would have attested - would have attested - would have attested - would have attested - would have attested Imperative - - - attest - - - - - - - -