must kill
Regular verb: kill - killed- killed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must kill
you must kill
he must kill
we must kill
you must kill
they must kill 	I must be killing
you must be killing
he must be killing
we must be killing
you must be killing
they must be killing	I must have killed
you must have killed
he must have killed
we must have killed
you must have killed
they must have killed	I must have been killing
you must have been killing
he must have been killing
we must have been killing
you must have been killing
they must have been killing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't kill
you mustn't kill
he mustn't kill
we mustn't kill
you mustn't kill
they mustn't kill 	I mustn't be killing
you mustn't be killing
he mustn't be killing
we mustn't be killing
you mustn't be killing
they mustn't be killing	I mustn't have killed
you mustn't have killed
he mustn't have killed
we mustn't have killed
you mustn't have killed
they mustn't have killed	I mustn't have been killing
you mustn't have been killing
he mustn't have been killing
we mustn't have been killing
you mustn't have been killing
they mustn't have been killing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I kill?
must you kill?
must he kill?
must we kill?
must you kill?
must they kill? 	must I be killing?
must you be killing?
must he be killing?
must we be killing?
must you be killing?
must they be killing? 	must I have killed?
must you have killed?
must he have killed?
must we have killed?
must you have killed?
must they have killed? 	must I have been killing?
must you have been killing?
must he have been killing?
must we have been killing?
must you have been killing?
must they have been killing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I kill?
mustn't you kill?
mustn't he kill?
mustn't we kill?
mustn't you kill?
mustn't they kill? 	mustn't I be killing?
mustn't you be killing?
mustn't he be killing?
mustn't we be killing?
mustn't you be killing?
mustn't they be killing? 	mustn't I have killed?
mustn't you have killed?
mustn't he have killed?
mustn't we have killed?
mustn't you have killed?
mustn't they have killed? 	mustn't I have been killing?
mustn't you have been killing?
mustn't he have been killing?
mustn't we have been killing?
mustn't you have been killing?
mustn't they have been killing?