English verb conjugation
MUST SLIPPER

Regular verb: slipper - slippered - slippered

Affirmation

Simple form	V-ing form
I must slipper you must slipper she must slipper we must slipper you must slipper they must slipper	I must be slippering you must be slippering she 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 she 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 she 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 must not slipper you must not slipper she must not slipper we must not slipper you must not slipper they must not slipper	I must not be slippering you must not be slippering she must not be slippering we must not be slippering you must not be slippering they must not be slippering
Perfect	V-ing perfect
I must not have slippered you must not have slippered she must not have slippered we must not have slippered you must not have slippered they must not have slippered	I must not have been slippering you must not have been slippering she must not have been slippering we must not have been slippering you must not have been slippering they must not have been slippering

Interrogative form

Simple form	V-ing form
must I slipper? must you slipper? must she slipper? must we slipper? must you slipper? must they slipper?	must I be slippering? must you be slippering? must she 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 she 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 she 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
must I not slipper? must you not slipper? must she not slipper? must we not slipper? must you not slipper? must they not slipper?	must I not be slippering? must you not be slippering? must she not be slippering? must we not be slippering? must you not be slippering? must they not be slippering?
Perfect	V-ing perfect
must I not have slippered? must you not have slippered? must she not have slippered? must we not have slippered? must you not have slippered? must they not have slippered?	must I not have been slippering? must you not have been slippering? must she not have been slippering? must we not have been slippering? must you not have been slippering? must they not have been slippering?