Present participle; Past participle - fevering - fevered Present - fever - fever - fevers - fever - fever - fever Past - fevered - fevered - fevered - fevered - fevered - fevered Future - will fever - will fever - will fever - will fever - will fever - will fever Present conditional - would fever - would fever - would fever - would fever - would fever - would fever Present Perfect - have fevered - have fevered - has fevered - have fevered - have fevered - have fevered Past Perfect - had fevered - had fevered - had fevered - had fevered - had fevered - had fevered Future Perfect - will have fevered - will have fevered - will have fevered - will have fevered - will have fevered - will have fevered Past conditional - would have fevered - would have fevered - would have fevered - would have fevered - would have fevered - would have fevered Imperative - - - fever - - - - - - - -