must porpoise
Regular verb: porpoise - porpoised- porpoised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must porpoise
you must porpoise
he must porpoise
we must porpoise
you must porpoise
they must porpoise 	I must be porpoising
you must be porpoising
he must be porpoising
we must be porpoising
you must be porpoising
they must be porpoising	I must have porpoised
you must have porpoised
he must have porpoised
we must have porpoised
you must have porpoised
they must have porpoised	I must have been porpoising
you must have been porpoising
he must have been porpoising
we must have been porpoising
you must have been porpoising
they must have been porpoising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't porpoise
you mustn't porpoise
he mustn't porpoise
we mustn't porpoise
you mustn't porpoise
they mustn't porpoise 	I mustn't be porpoising
you mustn't be porpoising
he mustn't be porpoising
we mustn't be porpoising
you mustn't be porpoising
they mustn't be porpoising	I mustn't have porpoised
you mustn't have porpoised
he mustn't have porpoised
we mustn't have porpoised
you mustn't have porpoised
they mustn't have porpoised	I mustn't have been porpoising
you mustn't have been porpoising
he mustn't have been porpoising
we mustn't have been porpoising
you mustn't have been porpoising
they mustn't have been porpoising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I porpoise?
must you porpoise?
must he porpoise?
must we porpoise?
must you porpoise?
must they porpoise? 	must I be porpoising?
must you be porpoising?
must he be porpoising?
must we be porpoising?
must you be porpoising?
must they be porpoising? 	must I have porpoised?
must you have porpoised?
must he have porpoised?
must we have porpoised?
must you have porpoised?
must they have porpoised? 	must I have been porpoising?
must you have been porpoising?
must he have been porpoising?
must we have been porpoising?
must you have been porpoising?
must they have been porpoising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I porpoise?
mustn't you porpoise?
mustn't he porpoise?
mustn't we porpoise?
mustn't you porpoise?
mustn't they porpoise? 	mustn't I be porpoising?
mustn't you be porpoising?
mustn't he be porpoising?
mustn't we be porpoising?
mustn't you be porpoising?
mustn't they be porpoising? 	mustn't I have porpoised?
mustn't you have porpoised?
mustn't he have porpoised?
mustn't we have porpoised?
mustn't you have porpoised?
mustn't they have porpoised? 	mustn't I have been porpoising?
mustn't you have been porpoising?
mustn't he have been porpoising?
mustn't we have been porpoising?
mustn't you have been porpoising?
mustn't they have been porpoising?