English verb conjugation
MUST SLIPPER

Regular verb: slipper - slippered - slippered

Affirmation

Simple form	V-ing form
I must slipper you must slipper he must slipper we must slipper you must slipper they must slipper	I must be slippering you must be slippering he must be slippering we must be slippering you must be slippering they must be slippering
Perfect	V-ing perfect
I must have slippered you must have slippered he must have slippered we must have slippered you must have slippered they must have slippered	I must have been slippering you must have been slippering he must have been slippering we must have been slippering you must have been slippering they must have been slippering

Negation

Simple form	V-ing form
I mustn't slipper you mustn't slipper he mustn't slipper we mustn't slipper you mustn't slipper they mustn't slipper	I mustn't be slippering you mustn't be slippering he mustn't be slippering we mustn't be slippering you mustn't be slippering they mustn't be slippering
Perfect	V-ing perfect
I mustn't have slippered you mustn't have slippered he mustn't have slippered we mustn't have slippered you mustn't have slippered they mustn't have slippered	I mustn't have been slippering you mustn't have been slippering he mustn't have been slippering we mustn't have been slippering you mustn't have been slippering they mustn't have been slippering

Interrogative form

Simple form	V-ing form
must I slipper? must you slipper? must he slipper? must we slipper? must you slipper? must they slipper?	must I be slippering? must you be slippering? must he be slippering? must we be slippering? must you be slippering? must they be slippering?
Perfect	V-ing perfect
must I have slippered? must you have slippered? must he have slippered? must we have slippered? must you have slippered? must they have slippered?	must I have been slippering? must you have been slippering? must he have been slippering? must we have been slippering? must you have been slippering? must they have been slippering?

Interro-negative form

Simple form	V-ing form
mustn't I slipper? mustn't you slipper? mustn't he slipper? mustn't we slipper? mustn't you slipper? mustn't they slipper?	mustn't I be slippering? mustn't you be slippering? mustn't he be slippering? mustn't we be slippering? mustn't you be slippering? mustn't they be slippering?
Perfect	V-ing perfect
mustn't I have slippered? mustn't you have slippered? mustn't he have slippered? mustn't we have slippered? mustn't you have slippered? mustn't they have slippered?	mustn't I have been slippering? mustn't you have been slippering? mustn't he have been slippering? mustn't we have been slippering? mustn't you have been slippering? mustn't they have been slippering?