English verb conjugation
COULD PREFORMAT

Regular verb: preformat - preformated - preformated

Affirmation

Simple form	V-ing form
I could preformat you could preformat he could preformat we could preformat you could preformat they could preformat	I could be preformating you could be preformating he could be preformating we could be preformating you could be preformating they could be preformating
Perfect	V-ing perfect
I could have preformated you could have preformated he could have preformated we could have preformated you could have preformated they could have preformated	I could have been preformating you could have been preformating he could have been preformating we could have been preformating you could have been preformating they could have been preformating

Negation

Simple form	V-ing form
I couldn't preformat you couldn't preformat he couldn't preformat we couldn't preformat you couldn't preformat they couldn't preformat	I couldn't be preformating you couldn't be preformating he couldn't be preformating we couldn't be preformating you couldn't be preformating they couldn't be preformating
Perfect	V-ing perfect
I couldn't have preformated you couldn't have preformated he couldn't have preformated we couldn't have preformated you couldn't have preformated they couldn't have preformated	I couldn't have been preformating you couldn't have been preformating he couldn't have been preformating we couldn't have been preformating you couldn't have been preformating they couldn't have been preformating

Interrogative form

Simple form	V-ing form
could I preformat? could you preformat? could he preformat? could we preformat? could you preformat? could they preformat?	could I be preformating? could you be preformating? could he be preformating? could we be preformating? could you be preformating? could they be preformating?
Perfect	V-ing perfect
could I have preformated? could you have preformated? could he have preformated? could we have preformated? could you have preformated? could they have preformated?	could I have been preformating? could you have been preformating? could he have been preformating? could we have been preformating? could you have been preformating? could they have been preformating?

Interro-negative form

Simple form	V-ing form
couldn't I preformat? couldn't you preformat? couldn't he preformat? couldn't we preformat? couldn't you preformat? couldn't they preformat?	couldn't I be preformating? couldn't you be preformating? couldn't he be preformating? couldn't we be preformating? couldn't you be preformating? couldn't they be preformating?
Perfect	V-ing perfect
couldn't I have preformated? couldn't you have preformated? couldn't he have preformated? couldn't we have preformated? couldn't you have preformated? couldn't they have preformated?	couldn't I have been preformating? couldn't you have been preformating? couldn't he have been preformating? couldn't we have been preformating? couldn't you have been preformating? couldn't they have been preformating?