could neuter
Regular verb: neuter - neutered- neutered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could neuter
you could neuter
he could neuter
we could neuter
you could neuter
they could neuter 	I could be neutering
you could be neutering
he could be neutering
we could be neutering
you could be neutering
they could be neutering	I could have neutered
you could have neutered
he could have neutered
we could have neutered
you could have neutered
they could have neutered	I could have been neutering
you could have been neutering
he could have been neutering
we could have been neutering
you could have been neutering
they could have been neutering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't neuter
you couldn't neuter
he couldn't neuter
we couldn't neuter
you couldn't neuter
they couldn't neuter 	I couldn't be neutering
you couldn't be neutering
he couldn't be neutering
we couldn't be neutering
you couldn't be neutering
they couldn't be neutering	I couldn't have neutered
you couldn't have neutered
he couldn't have neutered
we couldn't have neutered
you couldn't have neutered
they couldn't have neutered	I couldn't have been neutering
you couldn't have been neutering
he couldn't have been neutering
we couldn't have been neutering
you couldn't have been neutering
they couldn't have been neutering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I neuter?
could you neuter?
could he neuter?
could we neuter?
could you neuter?
could they neuter? 	could I be neutering?
could you be neutering?
could he be neutering?
could we be neutering?
could you be neutering?
could they be neutering? 	could I have neutered?
could you have neutered?
could he have neutered?
could we have neutered?
could you have neutered?
could they have neutered? 	could I have been neutering?
could you have been neutering?
could he have been neutering?
could we have been neutering?
could you have been neutering?
could they have been neutering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I neuter?
couldn't you neuter?
couldn't he neuter?
couldn't we neuter?
couldn't you neuter?
couldn't they neuter? 	couldn't I be neutering?
couldn't you be neutering?
couldn't he be neutering?
couldn't we be neutering?
couldn't you be neutering?
couldn't they be neutering? 	couldn't I have neutered?
couldn't you have neutered?
couldn't he have neutered?
couldn't we have neutered?
couldn't you have neutered?
couldn't they have neutered? 	couldn't I have been neutering?
couldn't you have been neutering?
couldn't he have been neutering?
couldn't we have been neutering?
couldn't you have been neutering?
couldn't they have been neutering?