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 couldn't gray you couldn't gray she couldn't gray we couldn't gray you couldn't gray they couldn't gray	I couldn't be graying you couldn't be graying she couldn't be graying we couldn't be graying you couldn't be graying they couldn't be graying
Perfect	V-ing perfect
I couldn't have grayed you couldn't have grayed she couldn't have grayed we couldn't have grayed you couldn't have grayed they couldn't have grayed	I couldn't have been graying you couldn't have been graying she couldn't have been graying we couldn't have been graying you couldn't have been graying they couldn't 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
couldn't I gray? couldn't you gray? couldn't she gray? couldn't we gray? couldn't you gray? couldn't they gray?	couldn't I be graying? couldn't you be graying? couldn't she be graying? couldn't we be graying? couldn't you be graying? couldn't they be graying?
Perfect	V-ing perfect
couldn't I have grayed? couldn't you have grayed? couldn't she have grayed? couldn't we have grayed? couldn't you have grayed? couldn't they have grayed?	couldn't I have been graying? couldn't you have been graying? couldn't she have been graying? couldn't we have been graying? couldn't you have been graying? couldn't they have been graying?