English verb conjugation
COULD WHITE

Regular verb: white - whited - whited

Affirmation

Simple form	V-ing form
I could white you could white he could white we could white you could white they could white	I could be whiting you could be whiting he could be whiting we could be whiting you could be whiting they could be whiting
Perfect	V-ing perfect
I could have whited you could have whited he could have whited we could have whited you could have whited they could have whited	I could have been whiting you could have been whiting he could have been whiting we could have been whiting you could have been whiting they could have been whiting

Negation

Simple form	V-ing form
I could not white you could not white he could not white we could not white you could not white they could not white	I could not be whiting you could not be whiting he could not be whiting we could not be whiting you could not be whiting they could not be whiting
Perfect	V-ing perfect
I could not have whited you could not have whited he could not have whited we could not have whited you could not have whited they could not have whited	I could not have been whiting you could not have been whiting he could not have been whiting we could not have been whiting you could not have been whiting they could not have been whiting

Interrogative form

Simple form	V-ing form
could I white? could you white? could he white? could we white? could you white? could they white?	could I be whiting? could you be whiting? could he be whiting? could we be whiting? could you be whiting? could they be whiting?
Perfect	V-ing perfect
could I have whited? could you have whited? could he have whited? could we have whited? could you have whited? could they have whited?	could I have been whiting? could you have been whiting? could he have been whiting? could we have been whiting? could you have been whiting? could they have been whiting?

Interro-negative form

Simple form	V-ing form
could I not white? could you not white? could he not white? could we not white? could you not white? could they not white?	could I not be whiting? could you not be whiting? could he not be whiting? could we not be whiting? could you not be whiting? could they not be whiting?
Perfect	V-ing perfect
could I not have whited? could you not have whited? could he not have whited? could we not have whited? could you not have whited? could they not have whited?	could I not have been whiting? could you not have been whiting? could he not have been whiting? could we not have been whiting? could you not have been whiting? could they not have been whiting?