could euthanize
Regular verb: euthanize - euthanized- euthanized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could euthanize
you could euthanize
she could euthanize
we could euthanize
you could euthanize
they could euthanize 	I could be euthanizing
you could be euthanizing
she could be euthanizing
we could be euthanizing
you could be euthanizing
they could be euthanizing	I could have euthanized
you could have euthanized
she could have euthanized
we could have euthanized
you could have euthanized
they could have euthanized	I could have been euthanizing
you could have been euthanizing
she could have been euthanizing
we could have been euthanizing
you could have been euthanizing
they could have been euthanizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't euthanize
you couldn't euthanize
she couldn't euthanize
we couldn't euthanize
you couldn't euthanize
they couldn't euthanize 	I couldn't be euthanizing
you couldn't be euthanizing
she couldn't be euthanizing
we couldn't be euthanizing
you couldn't be euthanizing
they couldn't be euthanizing	I couldn't have euthanized
you couldn't have euthanized
she couldn't have euthanized
we couldn't have euthanized
you couldn't have euthanized
they couldn't have euthanized	I couldn't have been euthanizing
you couldn't have been euthanizing
she couldn't have been euthanizing
we couldn't have been euthanizing
you couldn't have been euthanizing
they couldn't have been euthanizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I euthanize?
could you euthanize?
could she euthanize?
could we euthanize?
could you euthanize?
could they euthanize? 	could I be euthanizing?
could you be euthanizing?
could she be euthanizing?
could we be euthanizing?
could you be euthanizing?
could they be euthanizing? 	could I have euthanized?
could you have euthanized?
could she have euthanized?
could we have euthanized?
could you have euthanized?
could they have euthanized? 	could I have been euthanizing?
could you have been euthanizing?
could she have been euthanizing?
could we have been euthanizing?
could you have been euthanizing?
could they have been euthanizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I euthanize?
couldn't you euthanize?
couldn't she euthanize?
couldn't we euthanize?
couldn't you euthanize?
couldn't they euthanize? 	couldn't I be euthanizing?
couldn't you be euthanizing?
couldn't she be euthanizing?
couldn't we be euthanizing?
couldn't you be euthanizing?
couldn't they be euthanizing? 	couldn't I have euthanized?
couldn't you have euthanized?
couldn't she have euthanized?
couldn't we have euthanized?
couldn't you have euthanized?
couldn't they have euthanized? 	couldn't I have been euthanizing?
couldn't you have been euthanizing?
couldn't she have been euthanizing?
couldn't we have been euthanizing?
couldn't you have been euthanizing?
couldn't they have been euthanizing?