English verb conjugation
COULD GREY

Regular verb: grey - greyed - greyed

Affirmation

Simple form	V-ing form
I could grey you could grey she could grey we could grey you could grey they could grey	I could be greying you could be greying she could be greying we could be greying you could be greying they could be greying
Perfect	V-ing perfect
I could have greyed you could have greyed she could have greyed we could have greyed you could have greyed they could have greyed	I could have been greying you could have been greying she could have been greying we could have been greying you could have been greying they could have been greying

Negation

Simple form	V-ing form
I couldn't grey you couldn't grey she couldn't grey we couldn't grey you couldn't grey they couldn't grey	I couldn't be greying you couldn't be greying she couldn't be greying we couldn't be greying you couldn't be greying they couldn't be greying
Perfect	V-ing perfect
I couldn't have greyed you couldn't have greyed she couldn't have greyed we couldn't have greyed you couldn't have greyed they couldn't have greyed	I couldn't have been greying you couldn't have been greying she couldn't have been greying we couldn't have been greying you couldn't have been greying they couldn't have been greying

Interrogative form

Simple form	V-ing form
could I grey? could you grey? could she grey? could we grey? could you grey? could they grey?	could I be greying? could you be greying? could she be greying? could we be greying? could you be greying? could they be greying?
Perfect	V-ing perfect
could I have greyed? could you have greyed? could she have greyed? could we have greyed? could you have greyed? could they have greyed?	could I have been greying? could you have been greying? could she have been greying? could we have been greying? could you have been greying? could they have been greying?

Interro-negative form

Simple form	V-ing form
couldn't I grey? couldn't you grey? couldn't she grey? couldn't we grey? couldn't you grey? couldn't they grey?	couldn't I be greying? couldn't you be greying? couldn't she be greying? couldn't we be greying? couldn't you be greying? couldn't they be greying?
Perfect	V-ing perfect
couldn't I have greyed? couldn't you have greyed? couldn't she have greyed? couldn't we have greyed? couldn't you have greyed? couldn't they have greyed?	couldn't I have been greying? couldn't you have been greying? couldn't she have been greying? couldn't we have been greying? couldn't you have been greying? couldn't they have been greying?