can grey
Regular verb: grey - greyed- greyed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot grey
you cannot grey
she cannot grey
we cannot grey
you cannot grey
they cannot grey 	I cannot be greying
you cannot be greying
she cannot be greying
we cannot be greying
you cannot be greying
they cannot be greying	I cannot have greyed
you cannot have greyed
she cannot have greyed
we cannot have greyed
you cannot have greyed
they cannot have greyed	I cannot have been greying
you cannot have been greying
she cannot have been greying
we cannot have been greying
you cannot have been greying
they cannot have been greying	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not grey?
can you not grey?
can she not grey?
can we not grey?
can you not grey?
can they not grey? 	can I not be greying?
can you not be greying?
can she not be greying?
can we not be greying?
can you not be greying?
can they not be greying? 	can I not have greyed?
can you not have greyed?
can she not have greyed?
can we not have greyed?
can you not have greyed?
can they not have greyed? 	can I not have been greying?
can you not have been greying?
can she not have been greying?
can we not have been greying?
can you not have been greying?
can they not have been greying?