English verb conjugation
COULD INVAGINATE

Regular verb: invaginate - invaginated - invaginated

Affirmation

Simple form	V-ing form
I could invaginate you could invaginate she could invaginate we could invaginate you could invaginate they could invaginate	I could be invaginating you could be invaginating she could be invaginating we could be invaginating you could be invaginating they could be invaginating
Perfect	V-ing perfect
I could have invaginated you could have invaginated she could have invaginated we could have invaginated you could have invaginated they could have invaginated	I could have been invaginating you could have been invaginating she could have been invaginating we could have been invaginating you could have been invaginating they could have been invaginating

Negation

Simple form	V-ing form
I couldn't invaginate you couldn't invaginate she couldn't invaginate we couldn't invaginate you couldn't invaginate they couldn't invaginate	I couldn't be invaginating you couldn't be invaginating she couldn't be invaginating we couldn't be invaginating you couldn't be invaginating they couldn't be invaginating
Perfect	V-ing perfect
I couldn't have invaginated you couldn't have invaginated she couldn't have invaginated we couldn't have invaginated you couldn't have invaginated they couldn't have invaginated	I couldn't have been invaginating you couldn't have been invaginating she couldn't have been invaginating we couldn't have been invaginating you couldn't have been invaginating they couldn't have been invaginating

Interrogative form

Simple form	V-ing form
could I invaginate? could you invaginate? could she invaginate? could we invaginate? could you invaginate? could they invaginate?	could I be invaginating? could you be invaginating? could she be invaginating? could we be invaginating? could you be invaginating? could they be invaginating?
Perfect	V-ing perfect
could I have invaginated? could you have invaginated? could she have invaginated? could we have invaginated? could you have invaginated? could they have invaginated?	could I have been invaginating? could you have been invaginating? could she have been invaginating? could we have been invaginating? could you have been invaginating? could they have been invaginating?

Interro-negative form

Simple form	V-ing form
couldn't I invaginate? couldn't you invaginate? couldn't she invaginate? couldn't we invaginate? couldn't you invaginate? couldn't they invaginate?	couldn't I be invaginating? couldn't you be invaginating? couldn't she be invaginating? couldn't we be invaginating? couldn't you be invaginating? couldn't they be invaginating?
Perfect	V-ing perfect
couldn't I have invaginated? couldn't you have invaginated? couldn't she have invaginated? couldn't we have invaginated? couldn't you have invaginated? couldn't they have invaginated?	couldn't I have been invaginating? couldn't you have been invaginating? couldn't she have been invaginating? couldn't we have been invaginating? couldn't you have been invaginating? couldn't they have been invaginating?