must kipper
Regular verb: kipper - kippered- kippered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must kipper
you must kipper
he must kipper
we must kipper
you must kipper
they must kipper 	I must be kippering
you must be kippering
he must be kippering
we must be kippering
you must be kippering
they must be kippering	I must have kippered
you must have kippered
he must have kippered
we must have kippered
you must have kippered
they must have kippered	I must have been kippering
you must have been kippering
he must have been kippering
we must have been kippering
you must have been kippering
they must have been kippering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not kipper
you must not kipper
he must not kipper
we must not kipper
you must not kipper
they must not kipper 	I must not be kippering
you must not be kippering
he must not be kippering
we must not be kippering
you must not be kippering
they must not be kippering	I must not have kippered
you must not have kippered
he must not have kippered
we must not have kippered
you must not have kippered
they must not have kippered	I must not have been kippering
you must not have been kippering
he must not have been kippering
we must not have been kippering
you must not have been kippering
they must not have been kippering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I kipper?
must you kipper?
must he kipper?
must we kipper?
must you kipper?
must they kipper? 	must I be kippering?
must you be kippering?
must he be kippering?
must we be kippering?
must you be kippering?
must they be kippering? 	must I have kippered?
must you have kippered?
must he have kippered?
must we have kippered?
must you have kippered?
must they have kippered? 	must I have been kippering?
must you have been kippering?
must he have been kippering?
must we have been kippering?
must you have been kippering?
must they have been kippering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not kipper?
must you not kipper?
must he not kipper?
must we not kipper?
must you not kipper?
must they not kipper? 	must I not be kippering?
must you not be kippering?
must he not be kippering?
must we not be kippering?
must you not be kippering?
must they not be kippering? 	must I not have kippered?
must you not have kippered?
must he not have kippered?
must we not have kippered?
must you not have kippered?
must they not have kippered? 	must I not have been kippering?
must you not have been kippering?
must he not have been kippering?
must we not have been kippering?
must you not have been kippering?
must they not have been kippering?