must step
Verbo regular: step - stepped- stepped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not step
you must not step
he must not step
we must not step
you must not step
they must not step 	I must not be stepping
you must not be stepping
he must not be stepping
we must not be stepping
you must not be stepping
they must not be stepping	I must not have stepped
you must not have stepped
he must not have stepped
we must not have stepped
you must not have stepped
they must not have stepped	I must not have been stepping
you must not have been stepping
he must not have been stepping
we must not have been stepping
you must not have been stepping
they must not have been stepping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not step?
must you not step?
must he not step?
must we not step?
must you not step?
must they not step? 	must I not be stepping?
must you not be stepping?
must he not be stepping?
must we not be stepping?
must you not be stepping?
must they not be stepping? 	must I not have stepped?
must you not have stepped?
must he not have stepped?
must we not have stepped?
must you not have stepped?
must they not have stepped? 	must I not have been stepping?
must you not have been stepping?
must he not have been stepping?
must we not have been stepping?
must you not have been stepping?
must they not have been stepping?