Present participle; Past participle - telephoning - telephoned Present - telephone - telephone - telephones - telephone - telephone - telephone Past - telephoned - telephoned - telephoned - telephoned - telephoned - telephoned Future - will telephone - will telephone - will telephone - will telephone - will telephone - will telephone Present conditional - would telephone - would telephone - would telephone - would telephone - would telephone - would telephone Present Perfect - have telephoned - have telephoned - has telephoned - have telephoned - have telephoned - have telephoned Past Perfect - had telephoned - had telephoned - had telephoned - had telephoned - had telephoned - had telephoned Future Perfect - will have telephoned - will have telephoned - will have telephoned - will have telephoned - will have telephoned - will have telephoned Past conditional - would have telephoned - would have telephoned - would have telephoned - would have telephoned - would have telephoned - would have telephoned Imperative - - - telephone - - - - - - - -