English verb conjugation
COULD NEUTER

Regular verb: neuter - neutered - neutered

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?