must decapitate
Regular verb: decapitate - decapitated- decapitated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must decapitate
you must decapitate
he must decapitate
we must decapitate
you must decapitate
they must decapitate 	I must be decapitating
you must be decapitating
he must be decapitating
we must be decapitating
you must be decapitating
they must be decapitating	I must have decapitated
you must have decapitated
he must have decapitated
we must have decapitated
you must have decapitated
they must have decapitated	I must have been decapitating
you must have been decapitating
he must have been decapitating
we must have been decapitating
you must have been decapitating
they must have been decapitating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not decapitate
you must not decapitate
he must not decapitate
we must not decapitate
you must not decapitate
they must not decapitate 	I must not be decapitating
you must not be decapitating
he must not be decapitating
we must not be decapitating
you must not be decapitating
they must not be decapitating	I must not have decapitated
you must not have decapitated
he must not have decapitated
we must not have decapitated
you must not have decapitated
they must not have decapitated	I must not have been decapitating
you must not have been decapitating
he must not have been decapitating
we must not have been decapitating
you must not have been decapitating
they must not have been decapitating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I decapitate?
must you decapitate?
must he decapitate?
must we decapitate?
must you decapitate?
must they decapitate? 	must I be decapitating?
must you be decapitating?
must he be decapitating?
must we be decapitating?
must you be decapitating?
must they be decapitating? 	must I have decapitated?
must you have decapitated?
must he have decapitated?
must we have decapitated?
must you have decapitated?
must they have decapitated? 	must I have been decapitating?
must you have been decapitating?
must he have been decapitating?
must we have been decapitating?
must you have been decapitating?
must they have been decapitating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not decapitate?
must you not decapitate?
must he not decapitate?
must we not decapitate?
must you not decapitate?
must they not decapitate? 	must I not be decapitating?
must you not be decapitating?
must he not be decapitating?
must we not be decapitating?
must you not be decapitating?
must they not be decapitating? 	must I not have decapitated?
must you not have decapitated?
must he not have decapitated?
must we not have decapitated?
must you not have decapitated?
must they not have decapitated? 	must I not have been decapitating?
must you not have been decapitating?
must he not have been decapitating?
must we not have been decapitating?
must you not have been decapitating?
must they not have been decapitating?