must taper
Regular verb: taper - tapered- tapered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must taper
you must taper
he must taper
we must taper
you must taper
they must taper 	I must be tapering
you must be tapering
he must be tapering
we must be tapering
you must be tapering
they must be tapering	I must have tapered
you must have tapered
he must have tapered
we must have tapered
you must have tapered
they must have tapered	I must have been tapering
you must have been tapering
he must have been tapering
we must have been tapering
you must have been tapering
they must have been tapering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't taper
you mustn't taper
he mustn't taper
we mustn't taper
you mustn't taper
they mustn't taper 	I mustn't be tapering
you mustn't be tapering
he mustn't be tapering
we mustn't be tapering
you mustn't be tapering
they mustn't be tapering	I mustn't have tapered
you mustn't have tapered
he mustn't have tapered
we mustn't have tapered
you mustn't have tapered
they mustn't have tapered	I mustn't have been tapering
you mustn't have been tapering
he mustn't have been tapering
we mustn't have been tapering
you mustn't have been tapering
they mustn't have been tapering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I taper?
must you taper?
must he taper?
must we taper?
must you taper?
must they taper? 	must I be tapering?
must you be tapering?
must he be tapering?
must we be tapering?
must you be tapering?
must they be tapering? 	must I have tapered?
must you have tapered?
must he have tapered?
must we have tapered?
must you have tapered?
must they have tapered? 	must I have been tapering?
must you have been tapering?
must he have been tapering?
must we have been tapering?
must you have been tapering?
must they have been tapering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I taper?
mustn't you taper?
mustn't he taper?
mustn't we taper?
mustn't you taper?
mustn't they taper? 	mustn't I be tapering?
mustn't you be tapering?
mustn't he be tapering?
mustn't we be tapering?
mustn't you be tapering?
mustn't they be tapering? 	mustn't I have tapered?
mustn't you have tapered?
mustn't he have tapered?
mustn't we have tapered?
mustn't you have tapered?
mustn't they have tapered? 	mustn't I have been tapering?
mustn't you have been tapering?
mustn't he have been tapering?
mustn't we have been tapering?
mustn't you have been tapering?
mustn't they have been tapering?