must raven
Verbo regular: raven - ravened- ravened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must raven
you must raven
he must raven
we must raven
you must raven
they must raven 	I must be ravening
you must be ravening
he must be ravening
we must be ravening
you must be ravening
they must be ravening	I must have ravened
you must have ravened
he must have ravened
we must have ravened
you must have ravened
they must have ravened	I must have been ravening
you must have been ravening
he must have been ravening
we must have been ravening
you must have been ravening
they must have been ravening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not raven
you must not raven
he must not raven
we must not raven
you must not raven
they must not raven 	I must not be ravening
you must not be ravening
he must not be ravening
we must not be ravening
you must not be ravening
they must not be ravening	I must not have ravened
you must not have ravened
he must not have ravened
we must not have ravened
you must not have ravened
they must not have ravened	I must not have been ravening
you must not have been ravening
he must not have been ravening
we must not have been ravening
you must not have been ravening
they must not have been ravening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I raven?
must you raven?
must he raven?
must we raven?
must you raven?
must they raven? 	must I be ravening?
must you be ravening?
must he be ravening?
must we be ravening?
must you be ravening?
must they be ravening? 	must I have ravened?
must you have ravened?
must he have ravened?
must we have ravened?
must you have ravened?
must they have ravened? 	must I have been ravening?
must you have been ravening?
must he have been ravening?
must we have been ravening?
must you have been ravening?
must they have been ravening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not raven?
must you not raven?
must he not raven?
must we not raven?
must you not raven?
must they not raven? 	must I not be ravening?
must you not be ravening?
must he not be ravening?
must we not be ravening?
must you not be ravening?
must they not be ravening? 	must I not have ravened?
must you not have ravened?
must he not have ravened?
must we not have ravened?
must you not have ravened?
must they not have ravened? 	must I not have been ravening?
must you not have been ravening?
must he not have been ravening?
must we not have been ravening?
must you not have been ravening?
must they not have been ravening?