must stroke
Verbo regular: stroke - stroked- stroked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must stroke
you must stroke
he must stroke
we must stroke
you must stroke
they must stroke 	I must be stroking
you must be stroking
he must be stroking
we must be stroking
you must be stroking
they must be stroking	I must have stroked
you must have stroked
he must have stroked
we must have stroked
you must have stroked
they must have stroked	I must have been stroking
you must have been stroking
he must have been stroking
we must have been stroking
you must have been stroking
they must have been stroking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't stroke
you mustn't stroke
he mustn't stroke
we mustn't stroke
you mustn't stroke
they mustn't stroke 	I mustn't be stroking
you mustn't be stroking
he mustn't be stroking
we mustn't be stroking
you mustn't be stroking
they mustn't be stroking	I mustn't have stroked
you mustn't have stroked
he mustn't have stroked
we mustn't have stroked
you mustn't have stroked
they mustn't have stroked	I mustn't have been stroking
you mustn't have been stroking
he mustn't have been stroking
we mustn't have been stroking
you mustn't have been stroking
they mustn't have been stroking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I stroke?
must you stroke?
must he stroke?
must we stroke?
must you stroke?
must they stroke? 	must I be stroking?
must you be stroking?
must he be stroking?
must we be stroking?
must you be stroking?
must they be stroking? 	must I have stroked?
must you have stroked?
must he have stroked?
must we have stroked?
must you have stroked?
must they have stroked? 	must I have been stroking?
must you have been stroking?
must he have been stroking?
must we have been stroking?
must you have been stroking?
must they have been stroking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I stroke?
mustn't you stroke?
mustn't he stroke?
mustn't we stroke?
mustn't you stroke?
mustn't they stroke? 	mustn't I be stroking?
mustn't you be stroking?
mustn't he be stroking?
mustn't we be stroking?
mustn't you be stroking?
mustn't they be stroking? 	mustn't I have stroked?
mustn't you have stroked?
mustn't he have stroked?
mustn't we have stroked?
mustn't you have stroked?
mustn't they have stroked? 	mustn't I have been stroking?
mustn't you have been stroking?
mustn't he have been stroking?
mustn't we have been stroking?
mustn't you have been stroking?
mustn't they have been stroking?