Present participle; Past participle - quailing - quailed Present - quail - quail - quails - quail - quail - quail Past - quailed - quailed - quailed - quailed - quailed - quailed Future - will quail - will quail - will quail - will quail - will quail - will quail Present conditional - would quail - would quail - would quail - would quail - would quail - would quail Present Perfect - have quailed - have quailed - has quailed - have quailed - have quailed - have quailed Past Perfect - had quailed - had quailed - had quailed - had quailed - had quailed - had quailed Future Perfect - will have quailed - will have quailed - will have quailed - will have quailed - will have quailed - will have quailed Past conditional - would have quailed - would have quailed - would have quailed - would have quailed - would have quailed - would have quailed Imperative - - - quail - - - - - - - -