must asphyxiate
Regular verb: asphyxiate - asphyxiated- asphyxiated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must asphyxiate
you must asphyxiate
he must asphyxiate
we must asphyxiate
you must asphyxiate
they must asphyxiate 	I must be asphyxiating
you must be asphyxiating
he must be asphyxiating
we must be asphyxiating
you must be asphyxiating
they must be asphyxiating	I must have asphyxiated
you must have asphyxiated
he must have asphyxiated
we must have asphyxiated
you must have asphyxiated
they must have asphyxiated	I must have been asphyxiating
you must have been asphyxiating
he must have been asphyxiating
we must have been asphyxiating
you must have been asphyxiating
they must have been asphyxiating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't asphyxiate
you mustn't asphyxiate
he mustn't asphyxiate
we mustn't asphyxiate
you mustn't asphyxiate
they mustn't asphyxiate 	I mustn't be asphyxiating
you mustn't be asphyxiating
he mustn't be asphyxiating
we mustn't be asphyxiating
you mustn't be asphyxiating
they mustn't be asphyxiating	I mustn't have asphyxiated
you mustn't have asphyxiated
he mustn't have asphyxiated
we mustn't have asphyxiated
you mustn't have asphyxiated
they mustn't have asphyxiated	I mustn't have been asphyxiating
you mustn't have been asphyxiating
he mustn't have been asphyxiating
we mustn't have been asphyxiating
you mustn't have been asphyxiating
they mustn't have been asphyxiating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I asphyxiate?
must you asphyxiate?
must he asphyxiate?
must we asphyxiate?
must you asphyxiate?
must they asphyxiate? 	must I be asphyxiating?
must you be asphyxiating?
must he be asphyxiating?
must we be asphyxiating?
must you be asphyxiating?
must they be asphyxiating? 	must I have asphyxiated?
must you have asphyxiated?
must he have asphyxiated?
must we have asphyxiated?
must you have asphyxiated?
must they have asphyxiated? 	must I have been asphyxiating?
must you have been asphyxiating?
must he have been asphyxiating?
must we have been asphyxiating?
must you have been asphyxiating?
must they have been asphyxiating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I asphyxiate?
mustn't you asphyxiate?
mustn't he asphyxiate?
mustn't we asphyxiate?
mustn't you asphyxiate?
mustn't they asphyxiate? 	mustn't I be asphyxiating?
mustn't you be asphyxiating?
mustn't he be asphyxiating?
mustn't we be asphyxiating?
mustn't you be asphyxiating?
mustn't they be asphyxiating? 	mustn't I have asphyxiated?
mustn't you have asphyxiated?
mustn't he have asphyxiated?
mustn't we have asphyxiated?
mustn't you have asphyxiated?
mustn't they have asphyxiated? 	mustn't I have been asphyxiating?
mustn't you have been asphyxiating?
mustn't he have been asphyxiating?
mustn't we have been asphyxiating?
mustn't you have been asphyxiating?
mustn't they have been asphyxiating?