must stalk
Verbo regular: stalk - stalked- stalked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must stalk
you must stalk
he must stalk
we must stalk
you must stalk
they must stalk 	I must be stalking
you must be stalking
he must be stalking
we must be stalking
you must be stalking
they must be stalking	I must have stalked
you must have stalked
he must have stalked
we must have stalked
you must have stalked
they must have stalked	I must have been stalking
you must have been stalking
he must have been stalking
we must have been stalking
you must have been stalking
they must have been stalking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't stalk
you mustn't stalk
he mustn't stalk
we mustn't stalk
you mustn't stalk
they mustn't stalk 	I mustn't be stalking
you mustn't be stalking
he mustn't be stalking
we mustn't be stalking
you mustn't be stalking
they mustn't be stalking	I mustn't have stalked
you mustn't have stalked
he mustn't have stalked
we mustn't have stalked
you mustn't have stalked
they mustn't have stalked	I mustn't have been stalking
you mustn't have been stalking
he mustn't have been stalking
we mustn't have been stalking
you mustn't have been stalking
they mustn't have been stalking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I stalk?
must you stalk?
must he stalk?
must we stalk?
must you stalk?
must they stalk? 	must I be stalking?
must you be stalking?
must he be stalking?
must we be stalking?
must you be stalking?
must they be stalking? 	must I have stalked?
must you have stalked?
must he have stalked?
must we have stalked?
must you have stalked?
must they have stalked? 	must I have been stalking?
must you have been stalking?
must he have been stalking?
must we have been stalking?
must you have been stalking?
must they have been stalking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I stalk?
mustn't you stalk?
mustn't he stalk?
mustn't we stalk?
mustn't you stalk?
mustn't they stalk? 	mustn't I be stalking?
mustn't you be stalking?
mustn't he be stalking?
mustn't we be stalking?
mustn't you be stalking?
mustn't they be stalking? 	mustn't I have stalked?
mustn't you have stalked?
mustn't he have stalked?
mustn't we have stalked?
mustn't you have stalked?
mustn't they have stalked? 	mustn't I have been stalking?
mustn't you have been stalking?
mustn't he have been stalking?
mustn't we have been stalking?
mustn't you have been stalking?
mustn't they have been stalking?