I can grey you can grey he can grey we can grey you can grey they can grey
V-ing form
I can be greying you can be greying he can be greying we can be greying you can be greying they can be greying
Perfect
I can have greyed you can have greyed he can have greyed we can have greyed you can have greyed they can have greyed
V-ing perfect
I can have been greying you can have been greying he can have been greying we can have been greying you can have been greying they can have been greying
Negation
Simple form
I can't grey you can't grey he can't grey we can't grey you can't grey they can't grey
V-ing form
I can't be greying you can't be greying he can't be greying we can't be greying you can't be greying they can't be greying
Perfect
I can't have greyed you can't have greyed he can't have greyed we can't have greyed you can't have greyed they can't have greyed
V-ing perfect
I can't have been greying you can't have been greying he can't have been greying we can't have been greying you can't have been greying they can't have been greying
Interrogative form
Simple form
can I grey? can you grey? can he grey? can we grey? can you grey? can they grey?
V-ing form
can I be greying? can you be greying? can he be greying? can we be greying? can you be greying? can they be greying?
Perfect
can I have greyed? can you have greyed? can he have greyed? can we have greyed? can you have greyed? can they have greyed?
V-ing perfect
can I have been greying? can you have been greying? can he have been greying? can we have been greying? can you have been greying? can they have been greying?
Interro-negative form
Simple form
can't I grey? can't you grey? can't he grey? can't we grey? can't you grey? can't they grey?
V-ing form
can't I be greying? can't you be greying? can't he be greying? can't we be greying? can't you be greying? can't they be greying?
Perfect
can't I have greyed? can't you have greyed? can't he have greyed? can't we have greyed? can't you have greyed? can't they have greyed?
V-ing perfect
can't I have been greying? can't you have been greying? can't he have been greying? can't we have been greying? can't you have been greying? can't they have been greying?