could disable
Regular verb: disable - disabled- disabled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could disable
you could disable
he could disable
we could disable
you could disable
they could disable 	I could be disabling
you could be disabling
he could be disabling
we could be disabling
you could be disabling
they could be disabling	I could have disabled
you could have disabled
he could have disabled
we could have disabled
you could have disabled
they could have disabled	I could have been disabling
you could have been disabling
he could have been disabling
we could have been disabling
you could have been disabling
they could have been disabling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't disable
you couldn't disable
he couldn't disable
we couldn't disable
you couldn't disable
they couldn't disable 	I couldn't be disabling
you couldn't be disabling
he couldn't be disabling
we couldn't be disabling
you couldn't be disabling
they couldn't be disabling	I couldn't have disabled
you couldn't have disabled
he couldn't have disabled
we couldn't have disabled
you couldn't have disabled
they couldn't have disabled	I couldn't have been disabling
you couldn't have been disabling
he couldn't have been disabling
we couldn't have been disabling
you couldn't have been disabling
they couldn't have been disabling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I disable?
could you disable?
could he disable?
could we disable?
could you disable?
could they disable? 	could I be disabling?
could you be disabling?
could he be disabling?
could we be disabling?
could you be disabling?
could they be disabling? 	could I have disabled?
could you have disabled?
could he have disabled?
could we have disabled?
could you have disabled?
could they have disabled? 	could I have been disabling?
could you have been disabling?
could he have been disabling?
could we have been disabling?
could you have been disabling?
could they have been disabling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I disable?
couldn't you disable?
couldn't he disable?
couldn't we disable?
couldn't you disable?
couldn't they disable? 	couldn't I be disabling?
couldn't you be disabling?
couldn't he be disabling?
couldn't we be disabling?
couldn't you be disabling?
couldn't they be disabling? 	couldn't I have disabled?
couldn't you have disabled?
couldn't he have disabled?
couldn't we have disabled?
couldn't you have disabled?
couldn't they have disabled? 	couldn't I have been disabling?
couldn't you have been disabling?
couldn't he have been disabling?
couldn't we have been disabling?
couldn't you have been disabling?
couldn't they have been disabling?