English verb conjugation
COULD INFLECT

Regular verb: inflect - inflected - inflected

Affirmation

Simple form	V-ing form
I could inflect you could inflect he could inflect we could inflect you could inflect they could inflect	I could be inflecting you could be inflecting he could be inflecting we could be inflecting you could be inflecting they could be inflecting
Perfect	V-ing perfect
I could have inflected you could have inflected he could have inflected we could have inflected you could have inflected they could have inflected	I could have been inflecting you could have been inflecting he could have been inflecting we could have been inflecting you could have been inflecting they could have been inflecting

Negation

Simple form	V-ing form
I couldn't inflect you couldn't inflect he couldn't inflect we couldn't inflect you couldn't inflect they couldn't inflect	I couldn't be inflecting you couldn't be inflecting he couldn't be inflecting we couldn't be inflecting you couldn't be inflecting they couldn't be inflecting
Perfect	V-ing perfect
I couldn't have inflected you couldn't have inflected he couldn't have inflected we couldn't have inflected you couldn't have inflected they couldn't have inflected	I couldn't have been inflecting you couldn't have been inflecting he couldn't have been inflecting we couldn't have been inflecting you couldn't have been inflecting they couldn't have been inflecting

Interrogative form

Simple form	V-ing form
could I inflect? could you inflect? could he inflect? could we inflect? could you inflect? could they inflect?	could I be inflecting? could you be inflecting? could he be inflecting? could we be inflecting? could you be inflecting? could they be inflecting?
Perfect	V-ing perfect
could I have inflected? could you have inflected? could he have inflected? could we have inflected? could you have inflected? could they have inflected?	could I have been inflecting? could you have been inflecting? could he have been inflecting? could we have been inflecting? could you have been inflecting? could they have been inflecting?

Interro-negative form

Simple form	V-ing form
couldn't I inflect? couldn't you inflect? couldn't he inflect? couldn't we inflect? couldn't you inflect? couldn't they inflect?	couldn't I be inflecting? couldn't you be inflecting? couldn't he be inflecting? couldn't we be inflecting? couldn't you be inflecting? couldn't they be inflecting?
Perfect	V-ing perfect
couldn't I have inflected? couldn't you have inflected? couldn't he have inflected? couldn't we have inflected? couldn't you have inflected? couldn't they have inflected?	couldn't I have been inflecting? couldn't you have been inflecting? couldn't he have been inflecting? couldn't we have been inflecting? couldn't you have been inflecting? couldn't they have been inflecting?