could asphyxiate
Regular verb: asphyxiate - asphyxiated- asphyxiated

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

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

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

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