Present participle; Past participle - ribbing - ribbed Present - rib - rib - ribs - rib - rib - rib Past - ribbed - ribbed - ribbed - ribbed - ribbed - ribbed Future - will rib - will rib - will rib - will rib - will rib - will rib Present conditional - would rib - would rib - would rib - would rib - would rib - would rib Present Perfect - have ribbed - have ribbed - has ribbed - have ribbed - have ribbed - have ribbed Past Perfect - had ribbed - had ribbed - had ribbed - had ribbed - had ribbed - had ribbed Future Perfect - will have ribbed - will have ribbed - will have ribbed - will have ribbed - will have ribbed - will have ribbed Past conditional - would have ribbed - would have ribbed - would have ribbed - would have ribbed - would have ribbed - would have ribbed Imperative - - - rib - - - - - - - -