Present participle; Past participle - unstopping - unstopped Present - unstop - unstop - unstops - unstop - unstop - unstop Past - unstopped - unstopped - unstopped - unstopped - unstopped - unstopped Future - will unstop - will unstop - will unstop - will unstop - will unstop - will unstop Present conditional - would unstop - would unstop - would unstop - would unstop - would unstop - would unstop Present Perfect - have unstopped - have unstopped - has unstopped - have unstopped - have unstopped - have unstopped Past Perfect - had unstopped - had unstopped - had unstopped - had unstopped - had unstopped - had unstopped Future Perfect - will have unstopped - will have unstopped - will have unstopped - will have unstopped - will have unstopped - will have unstopped Past conditional - would have unstopped - would have unstopped - would have unstopped - would have unstopped - would have unstopped - would have unstopped Imperative - - - unstop - - - - - - - -