I could asphyxiate you could asphyxiate he could asphyxiate we could asphyxiate you could asphyxiate they could asphyxiate
V-ing form
I could be asphyxiating you could be asphyxiating he could be asphyxiating we could be asphyxiating you could be asphyxiating they could be asphyxiating
Perfect
I could have asphyxiated you could have asphyxiated he could have asphyxiated we could have asphyxiated you could have asphyxiated they could have asphyxiated
V-ing perfect
I could have been asphyxiating you could have been asphyxiating he could have been asphyxiating we could have been asphyxiating you could have been asphyxiating they could have been asphyxiating
Negation
Simple form
I could not asphyxiate you could not asphyxiate he could not asphyxiate we could not asphyxiate you could not asphyxiate they could not asphyxiate
V-ing form
I could not be asphyxiating you could not be asphyxiating he could not be asphyxiating we could not be asphyxiating you could not be asphyxiating they could not be asphyxiating
Perfect
I could not have asphyxiated you could not have asphyxiated he could not have asphyxiated we could not have asphyxiated you could not have asphyxiated they could not have asphyxiated
V-ing perfect
I could not have been asphyxiating you could not have been asphyxiating he could not have been asphyxiating we could not have been asphyxiating you could not have been asphyxiating they could not have been asphyxiating
Interrogative form
Simple form
could I asphyxiate? could you asphyxiate? could he asphyxiate? could we asphyxiate? could you asphyxiate? could they asphyxiate?
V-ing form
could I be asphyxiating? could you be asphyxiating? could he be asphyxiating? could we be asphyxiating? could you be asphyxiating? could they be asphyxiating?
Perfect
could I have asphyxiated? could you have asphyxiated? could he have asphyxiated? could we have asphyxiated? could you have asphyxiated? could they have asphyxiated?
V-ing perfect
could I have been asphyxiating? could you have been asphyxiating? could he have been asphyxiating? could we have been asphyxiating? could you have been asphyxiating? could they have been asphyxiating?
Interro-negative form
Simple form
could I not asphyxiate? could you not asphyxiate? could he not asphyxiate? could we not asphyxiate? could you not asphyxiate? could they not asphyxiate?
V-ing form
could I not be asphyxiating? could you not be asphyxiating? could he not be asphyxiating? could we not be asphyxiating? could you not be asphyxiating? could they not be asphyxiating?
Perfect
could I not have asphyxiated? could you not have asphyxiated? could he not have asphyxiated? could we not have asphyxiated? could you not have asphyxiated? could they not have asphyxiated?
V-ing perfect
could I not have been asphyxiating? could you not have been asphyxiating? could he not have been asphyxiating? could we not have been asphyxiating? could you not have been asphyxiating? could they not have been asphyxiating?