English verb conjugation
COULD OVERDESIGN

Regular verb: overdesign - overdesigned - overdesigned

Affirmation

Simple form	V-ing form
I could overdesign you could overdesign he could overdesign we could overdesign you could overdesign they could overdesign	I could be overdesigning you could be overdesigning he could be overdesigning we could be overdesigning you could be overdesigning they could be overdesigning
Perfect	V-ing perfect
I could have overdesigned you could have overdesigned he could have overdesigned we could have overdesigned you could have overdesigned they could have overdesigned	I could have been overdesigning you could have been overdesigning he could have been overdesigning we could have been overdesigning you could have been overdesigning they could have been overdesigning

Negation

Simple form	V-ing form
I couldn't overdesign you couldn't overdesign he couldn't overdesign we couldn't overdesign you couldn't overdesign they couldn't overdesign	I couldn't be overdesigning you couldn't be overdesigning he couldn't be overdesigning we couldn't be overdesigning you couldn't be overdesigning they couldn't be overdesigning
Perfect	V-ing perfect
I couldn't have overdesigned you couldn't have overdesigned he couldn't have overdesigned we couldn't have overdesigned you couldn't have overdesigned they couldn't have overdesigned	I couldn't have been overdesigning you couldn't have been overdesigning he couldn't have been overdesigning we couldn't have been overdesigning you couldn't have been overdesigning they couldn't have been overdesigning

Interrogative form

Simple form	V-ing form
could I overdesign? could you overdesign? could he overdesign? could we overdesign? could you overdesign? could they overdesign?	could I be overdesigning? could you be overdesigning? could he be overdesigning? could we be overdesigning? could you be overdesigning? could they be overdesigning?
Perfect	V-ing perfect
could I have overdesigned? could you have overdesigned? could he have overdesigned? could we have overdesigned? could you have overdesigned? could they have overdesigned?	could I have been overdesigning? could you have been overdesigning? could he have been overdesigning? could we have been overdesigning? could you have been overdesigning? could they have been overdesigning?

Interro-negative form

Simple form	V-ing form
couldn't I overdesign? couldn't you overdesign? couldn't he overdesign? couldn't we overdesign? couldn't you overdesign? couldn't they overdesign?	couldn't I be overdesigning? couldn't you be overdesigning? couldn't he be overdesigning? couldn't we be overdesigning? couldn't you be overdesigning? couldn't they be overdesigning?
Perfect	V-ing perfect
couldn't I have overdesigned? couldn't you have overdesigned? couldn't he have overdesigned? couldn't we have overdesigned? couldn't you have overdesigned? couldn't they have overdesigned?	couldn't I have been overdesigning? couldn't you have been overdesigning? couldn't he have been overdesigning? couldn't we have been overdesigning? couldn't you have been overdesigning? couldn't they have been overdesigning?