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