must dam
Verbo regular: dam - dammed- dammed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must dam
you must dam
he must dam
we must dam
you must dam
they must dam 	I must be damming
you must be damming
he must be damming
we must be damming
you must be damming
they must be damming	I must have dammed
you must have dammed
he must have dammed
we must have dammed
you must have dammed
they must have dammed	I must have been damming
you must have been damming
he must have been damming
we must have been damming
you must have been damming
they must have been damming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't dam
you mustn't dam
he mustn't dam
we mustn't dam
you mustn't dam
they mustn't dam 	I mustn't be damming
you mustn't be damming
he mustn't be damming
we mustn't be damming
you mustn't be damming
they mustn't be damming	I mustn't have dammed
you mustn't have dammed
he mustn't have dammed
we mustn't have dammed
you mustn't have dammed
they mustn't have dammed	I mustn't have been damming
you mustn't have been damming
he mustn't have been damming
we mustn't have been damming
you mustn't have been damming
they mustn't have been damming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I dam?
must you dam?
must he dam?
must we dam?
must you dam?
must they dam? 	must I be damming?
must you be damming?
must he be damming?
must we be damming?
must you be damming?
must they be damming? 	must I have dammed?
must you have dammed?
must he have dammed?
must we have dammed?
must you have dammed?
must they have dammed? 	must I have been damming?
must you have been damming?
must he have been damming?
must we have been damming?
must you have been damming?
must they have been damming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I dam?
mustn't you dam?
mustn't he dam?
mustn't we dam?
mustn't you dam?
mustn't they dam? 	mustn't I be damming?
mustn't you be damming?
mustn't he be damming?
mustn't we be damming?
mustn't you be damming?
mustn't they be damming? 	mustn't I have dammed?
mustn't you have dammed?
mustn't he have dammed?
mustn't we have dammed?
mustn't you have dammed?
mustn't they have dammed? 	mustn't I have been damming?
mustn't you have been damming?
mustn't he have been damming?
mustn't we have been damming?
mustn't you have been damming?
mustn't they have been damming?