Present participle; Past participle - quivering - quivered Present - quiver - quiver - quivers - quiver - quiver - quiver Past - quivered - quivered - quivered - quivered - quivered - quivered Future - will quiver - will quiver - will quiver - will quiver - will quiver - will quiver Present conditional - would quiver - would quiver - would quiver - would quiver - would quiver - would quiver Present Perfect - have quivered - have quivered - has quivered - have quivered - have quivered - have quivered Past Perfect - had quivered - had quivered - had quivered - had quivered - had quivered - had quivered Future Perfect - will have quivered - will have quivered - will have quivered - will have quivered - will have quivered - will have quivered Past conditional - would have quivered - would have quivered - would have quivered - would have quivered - would have quivered - would have quivered Imperative - - - quiver - - - - - - - -