English verb conjugation
COULD GRAY

Regular verb: gray - grayed - grayed

Affirmation

Simple form	V-ing form
I could gray you could gray she could gray we could gray you could gray they could gray	I could be graying you could be graying she could be graying we could be graying you could be graying they could be graying
Perfect	V-ing perfect
I could have grayed you could have grayed she could have grayed we could have grayed you could have grayed they could have grayed	I could have been graying you could have been graying she could have been graying we could have been graying you could have been graying they could have been graying

Negation

Simple form	V-ing form
I could not gray you could not gray she could not gray we could not gray you could not gray they could not gray	I could not be graying you could not be graying she could not be graying we could not be graying you could not be graying they could not be graying
Perfect	V-ing perfect
I could not have grayed you could not have grayed she could not have grayed we could not have grayed you could not have grayed they could not have grayed	I could not have been graying you could not have been graying she could not have been graying we could not have been graying you could not have been graying they could not have been graying

Interrogative form

Simple form	V-ing form
could I gray? could you gray? could she gray? could we gray? could you gray? could they gray?	could I be graying? could you be graying? could she be graying? could we be graying? could you be graying? could they be graying?
Perfect	V-ing perfect
could I have grayed? could you have grayed? could she have grayed? could we have grayed? could you have grayed? could they have grayed?	could I have been graying? could you have been graying? could she have been graying? could we have been graying? could you have been graying? could they have been graying?

Interro-negative form

Simple form	V-ing form
could I not gray? could you not gray? could she not gray? could we not gray? could you not gray? could they not gray?	could I not be graying? could you not be graying? could she not be graying? could we not be graying? could you not be graying? could they not be graying?
Perfect	V-ing perfect
could I not have grayed? could you not have grayed? could she not have grayed? could we not have grayed? could you not have grayed? could they not have grayed?	could I not have been graying? could you not have been graying? could she not have been graying? could we not have been graying? could you not have been graying? could they not have been graying?