English verb conjugation
CAN SLIPPER

Regular verb: slipper - slippered - slippered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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