could euthanise
Regular verb: euthanise - euthanised- euthanised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could euthanise
you could euthanise
he could euthanise
we could euthanise
you could euthanise
they could euthanise 	I could be euthanising
you could be euthanising
he could be euthanising
we could be euthanising
you could be euthanising
they could be euthanising	I could have euthanised
you could have euthanised
he could have euthanised
we could have euthanised
you could have euthanised
they could have euthanised	I could have been euthanising
you could have been euthanising
he could have been euthanising
we could have been euthanising
you could have been euthanising
they could have been euthanising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't euthanise
you couldn't euthanise
he couldn't euthanise
we couldn't euthanise
you couldn't euthanise
they couldn't euthanise 	I couldn't be euthanising
you couldn't be euthanising
he couldn't be euthanising
we couldn't be euthanising
you couldn't be euthanising
they couldn't be euthanising	I couldn't have euthanised
you couldn't have euthanised
he couldn't have euthanised
we couldn't have euthanised
you couldn't have euthanised
they couldn't have euthanised	I couldn't have been euthanising
you couldn't have been euthanising
he couldn't have been euthanising
we couldn't have been euthanising
you couldn't have been euthanising
they couldn't have been euthanising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I euthanise?
could you euthanise?
could he euthanise?
could we euthanise?
could you euthanise?
could they euthanise? 	could I be euthanising?
could you be euthanising?
could he be euthanising?
could we be euthanising?
could you be euthanising?
could they be euthanising? 	could I have euthanised?
could you have euthanised?
could he have euthanised?
could we have euthanised?
could you have euthanised?
could they have euthanised? 	could I have been euthanising?
could you have been euthanising?
could he have been euthanising?
could we have been euthanising?
could you have been euthanising?
could they have been euthanising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I euthanise?
couldn't you euthanise?
couldn't he euthanise?
couldn't we euthanise?
couldn't you euthanise?
couldn't they euthanise? 	couldn't I be euthanising?
couldn't you be euthanising?
couldn't he be euthanising?
couldn't we be euthanising?
couldn't you be euthanising?
couldn't they be euthanising? 	couldn't I have euthanised?
couldn't you have euthanised?
couldn't he have euthanised?
couldn't we have euthanised?
couldn't you have euthanised?
couldn't they have euthanised? 	couldn't I have been euthanising?
couldn't you have been euthanising?
couldn't he have been euthanising?
couldn't we have been euthanising?
couldn't you have been euthanising?
couldn't they have been euthanising?