Present participle; Past participle - throbbing - throbbed Present - throb - throb - throbs - throb - throb - throb Past - throbbed - throbbed - throbbed - throbbed - throbbed - throbbed Future - will throb - will throb - will throb - will throb - will throb - will throb Present conditional - would throb - would throb - would throb - would throb - would throb - would throb Present Perfect - have throbbed - have throbbed - has throbbed - have throbbed - have throbbed - have throbbed Past Perfect - had throbbed - had throbbed - had throbbed - had throbbed - had throbbed - had throbbed Future Perfect - will have throbbed - will have throbbed - will have throbbed - will have throbbed - will have throbbed - will have throbbed Past conditional - would have throbbed - would have throbbed - would have throbbed - would have throbbed - would have throbbed - would have throbbed Imperative - - - throb - - - - - - - -