Present participle; Past participle - yawning - yawned Present - yawn - yawn - yawns - yawn - yawn - yawn Past - yawned - yawned - yawned - yawned - yawned - yawned Future - will yawn - will yawn - will yawn - will yawn - will yawn - will yawn Present conditional - would yawn - would yawn - would yawn - would yawn - would yawn - would yawn Present Perfect - have yawned - have yawned - has yawned - have yawned - have yawned - have yawned Past Perfect - had yawned - had yawned - had yawned - had yawned - had yawned - had yawned Future Perfect - will have yawned - will have yawned - will have yawned - will have yawned - will have yawned - will have yawned Past conditional - would have yawned - would have yawned - would have yawned - would have yawned - would have yawned - would have yawned Imperative - - - yawn - - - - - - - -