English verb conjugation
COULD PREFORMAT

Regular verb: preformat - preformated - preformated

Affirmation

Simple form	V-ing form
I could preformat you could preformat she could preformat we could preformat you could preformat they could preformat	I could be preformating you could be preformating she 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 she 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 she 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 she 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 she 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 she 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 she 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 she preformat? could we preformat? could you preformat? could they preformat?	could I be preformating? could you be preformating? could she 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 she 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 she 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 she 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 she 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 she 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 she have been preformating? couldn't we have been preformating? couldn't you have been preformating? couldn't they have been preformating?