must woof
Regular verb: woof - woofed- woofed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must woof
you must woof
she must woof
we must woof
you must woof
they must woof 	I must be woofing
you must be woofing
she must be woofing
we must be woofing
you must be woofing
they must be woofing	I must have woofed
you must have woofed
she must have woofed
we must have woofed
you must have woofed
they must have woofed	I must have been woofing
you must have been woofing
she must have been woofing
we must have been woofing
you must have been woofing
they must have been woofing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't woof
you mustn't woof
she mustn't woof
we mustn't woof
you mustn't woof
they mustn't woof 	I mustn't be woofing
you mustn't be woofing
she mustn't be woofing
we mustn't be woofing
you mustn't be woofing
they mustn't be woofing	I mustn't have woofed
you mustn't have woofed
she mustn't have woofed
we mustn't have woofed
you mustn't have woofed
they mustn't have woofed	I mustn't have been woofing
you mustn't have been woofing
she mustn't have been woofing
we mustn't have been woofing
you mustn't have been woofing
they mustn't have been woofing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I woof?
must you woof?
must she woof?
must we woof?
must you woof?
must they woof? 	must I be woofing?
must you be woofing?
must she be woofing?
must we be woofing?
must you be woofing?
must they be woofing? 	must I have woofed?
must you have woofed?
must she have woofed?
must we have woofed?
must you have woofed?
must they have woofed? 	must I have been woofing?
must you have been woofing?
must she have been woofing?
must we have been woofing?
must you have been woofing?
must they have been woofing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I woof?
mustn't you woof?
mustn't she woof?
mustn't we woof?
mustn't you woof?
mustn't they woof? 	mustn't I be woofing?
mustn't you be woofing?
mustn't she be woofing?
mustn't we be woofing?
mustn't you be woofing?
mustn't they be woofing? 	mustn't I have woofed?
mustn't you have woofed?
mustn't she have woofed?
mustn't we have woofed?
mustn't you have woofed?
mustn't they have woofed? 	mustn't I have been woofing?
mustn't you have been woofing?
mustn't she have been woofing?
mustn't we have been woofing?
mustn't you have been woofing?
mustn't they have been woofing?