English verb conjugation
COULD OD

Regular verb: od - oded - oded

Affirmation

Simple form	V-ing form
I could od you could od he could od we could od you could od they could od	I could be oding you could be oding he could be oding we could be oding you could be oding they could be oding
Perfect	V-ing perfect
I could have oded you could have oded he could have oded we could have oded you could have oded they could have oded	I could have been oding you could have been oding he could have been oding we could have been oding you could have been oding they could have been oding

Negation

Simple form	V-ing form
I couldn't od you couldn't od he couldn't od we couldn't od you couldn't od they couldn't od	I couldn't be oding you couldn't be oding he couldn't be oding we couldn't be oding you couldn't be oding they couldn't be oding
Perfect	V-ing perfect
I couldn't have oded you couldn't have oded he couldn't have oded we couldn't have oded you couldn't have oded they couldn't have oded	I couldn't have been oding you couldn't have been oding he couldn't have been oding we couldn't have been oding you couldn't have been oding they couldn't have been oding

Interrogative form

Simple form	V-ing form
could I od? could you od? could he od? could we od? could you od? could they od?	could I be oding? could you be oding? could he be oding? could we be oding? could you be oding? could they be oding?
Perfect	V-ing perfect
could I have oded? could you have oded? could he have oded? could we have oded? could you have oded? could they have oded?	could I have been oding? could you have been oding? could he have been oding? could we have been oding? could you have been oding? could they have been oding?

Interro-negative form

Simple form	V-ing form
couldn't I od? couldn't you od? couldn't he od? couldn't we od? couldn't you od? couldn't they od?	couldn't I be oding? couldn't you be oding? couldn't he be oding? couldn't we be oding? couldn't you be oding? couldn't they be oding?
Perfect	V-ing perfect
couldn't I have oded? couldn't you have oded? couldn't he have oded? couldn't we have oded? couldn't you have oded? couldn't they have oded?	couldn't I have been oding? couldn't you have been oding? couldn't he have been oding? couldn't we have been oding? couldn't you have been oding? couldn't they have been oding?