English verb conjugation
COULD COPY

Regular verb: copy - copied - copied

Affirmation

Simple form	V-ing form
I could copy you could copy he could copy we could copy you could copy they could copy	I could be copying you could be copying he could be copying we could be copying you could be copying they could be copying
Perfect	V-ing perfect
I could have copied you could have copied he could have copied we could have copied you could have copied they could have copied	I could have been copying you could have been copying he could have been copying we could have been copying you could have been copying they could have been copying

Negation

Simple form	V-ing form
I couldn't copy you couldn't copy he couldn't copy we couldn't copy you couldn't copy they couldn't copy	I couldn't be copying you couldn't be copying he couldn't be copying we couldn't be copying you couldn't be copying they couldn't be copying
Perfect	V-ing perfect
I couldn't have copied you couldn't have copied he couldn't have copied we couldn't have copied you couldn't have copied they couldn't have copied	I couldn't have been copying you couldn't have been copying he couldn't have been copying we couldn't have been copying you couldn't have been copying they couldn't have been copying

Interrogative form

Simple form	V-ing form
could I copy? could you copy? could he copy? could we copy? could you copy? could they copy?	could I be copying? could you be copying? could he be copying? could we be copying? could you be copying? could they be copying?
Perfect	V-ing perfect
could I have copied? could you have copied? could he have copied? could we have copied? could you have copied? could they have copied?	could I have been copying? could you have been copying? could he have been copying? could we have been copying? could you have been copying? could they have been copying?

Interro-negative form

Simple form	V-ing form
couldn't I copy? couldn't you copy? couldn't he copy? couldn't we copy? couldn't you copy? couldn't they copy?	couldn't I be copying? couldn't you be copying? couldn't he be copying? couldn't we be copying? couldn't you be copying? couldn't they be copying?
Perfect	V-ing perfect
couldn't I have copied? couldn't you have copied? couldn't he have copied? couldn't we have copied? couldn't you have copied? couldn't they have copied?	couldn't I have been copying? couldn't you have been copying? couldn't he have been copying? couldn't we have been copying? couldn't you have been copying? couldn't they have been copying?