must step
Verbo regular: step - stepped- stepped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must step
you must step
he must step
we must step
you must step
they must step 	I must be stepping
you must be stepping
he must be stepping
we must be stepping
you must be stepping
they must be stepping	I must have stepped
you must have stepped
he must have stepped
we must have stepped
you must have stepped
they must have stepped	I must have been stepping
you must have been stepping
he must have been stepping
we must have been stepping
you must have been stepping
they must have been stepping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't step
you mustn't step
he mustn't step
we mustn't step
you mustn't step
they mustn't step 	I mustn't be stepping
you mustn't be stepping
he mustn't be stepping
we mustn't be stepping
you mustn't be stepping
they mustn't be stepping	I mustn't have stepped
you mustn't have stepped
he mustn't have stepped
we mustn't have stepped
you mustn't have stepped
they mustn't have stepped	I mustn't have been stepping
you mustn't have been stepping
he mustn't have been stepping
we mustn't have been stepping
you mustn't have been stepping
they mustn't have been stepping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I step?
must you step?
must he step?
must we step?
must you step?
must they step? 	must I be stepping?
must you be stepping?
must he be stepping?
must we be stepping?
must you be stepping?
must they be stepping? 	must I have stepped?
must you have stepped?
must he have stepped?
must we have stepped?
must you have stepped?
must they have stepped? 	must I have been stepping?
must you have been stepping?
must he have been stepping?
must we have been stepping?
must you have been stepping?
must they have been stepping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I step?
mustn't you step?
mustn't he step?
mustn't we step?
mustn't you step?
mustn't they step? 	mustn't I be stepping?
mustn't you be stepping?
mustn't he be stepping?
mustn't we be stepping?
mustn't you be stepping?
mustn't they be stepping? 	mustn't I have stepped?
mustn't you have stepped?
mustn't he have stepped?
mustn't we have stepped?
mustn't you have stepped?
mustn't they have stepped? 	mustn't I have been stepping?
mustn't you have been stepping?
mustn't he have been stepping?
mustn't we have been stepping?
mustn't you have been stepping?
mustn't they have been stepping?