could white
Regular verb: white - whited- whited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could white
you could white
she could white
we could white
you could white
they could white 	I could be whiting
you could be whiting
she could be whiting
we could be whiting
you could be whiting
they could be whiting	I could have whited
you could have whited
she could have whited
we could have whited
you could have whited
they could have whited	I could have been whiting
you could have been whiting
she could have been whiting
we could have been whiting
you could have been whiting
they could have been whiting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't white
you couldn't white
she couldn't white
we couldn't white
you couldn't white
they couldn't white 	I couldn't be whiting
you couldn't be whiting
she couldn't be whiting
we couldn't be whiting
you couldn't be whiting
they couldn't be whiting	I couldn't have whited
you couldn't have whited
she couldn't have whited
we couldn't have whited
you couldn't have whited
they couldn't have whited	I couldn't have been whiting
you couldn't have been whiting
she couldn't have been whiting
we couldn't have been whiting
you couldn't have been whiting
they couldn't have been whiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I white?
could you white?
could she white?
could we white?
could you white?
could they white? 	could I be whiting?
could you be whiting?
could she be whiting?
could we be whiting?
could you be whiting?
could they be whiting? 	could I have whited?
could you have whited?
could she have whited?
could we have whited?
could you have whited?
could they have whited? 	could I have been whiting?
could you have been whiting?
could she have been whiting?
could we have been whiting?
could you have been whiting?
could they have been whiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I white?
couldn't you white?
couldn't she white?
couldn't we white?
couldn't you white?
couldn't they white? 	couldn't I be whiting?
couldn't you be whiting?
couldn't she be whiting?
couldn't we be whiting?
couldn't you be whiting?
couldn't they be whiting? 	couldn't I have whited?
couldn't you have whited?
couldn't she have whited?
couldn't we have whited?
couldn't you have whited?
couldn't they have whited? 	couldn't I have been whiting?
couldn't you have been whiting?
couldn't she have been whiting?
couldn't we have been whiting?
couldn't you have been whiting?
couldn't they have been whiting?