could heal
Regular verb: heal - healed- healed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could heal
you could heal
he could heal
we could heal
you could heal
they could heal 	I could be healing
you could be healing
he could be healing
we could be healing
you could be healing
they could be healing	I could have healed
you could have healed
he could have healed
we could have healed
you could have healed
they could have healed	I could have been healing
you could have been healing
he could have been healing
we could have been healing
you could have been healing
they could have been healing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't heal
you couldn't heal
he couldn't heal
we couldn't heal
you couldn't heal
they couldn't heal 	I couldn't be healing
you couldn't be healing
he couldn't be healing
we couldn't be healing
you couldn't be healing
they couldn't be healing	I couldn't have healed
you couldn't have healed
he couldn't have healed
we couldn't have healed
you couldn't have healed
they couldn't have healed	I couldn't have been healing
you couldn't have been healing
he couldn't have been healing
we couldn't have been healing
you couldn't have been healing
they couldn't have been healing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I heal?
could you heal?
could he heal?
could we heal?
could you heal?
could they heal? 	could I be healing?
could you be healing?
could he be healing?
could we be healing?
could you be healing?
could they be healing? 	could I have healed?
could you have healed?
could he have healed?
could we have healed?
could you have healed?
could they have healed? 	could I have been healing?
could you have been healing?
could he have been healing?
could we have been healing?
could you have been healing?
could they have been healing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I heal?
couldn't you heal?
couldn't he heal?
couldn't we heal?
couldn't you heal?
couldn't they heal? 	couldn't I be healing?
couldn't you be healing?
couldn't he be healing?
couldn't we be healing?
couldn't you be healing?
couldn't they be healing? 	couldn't I have healed?
couldn't you have healed?
couldn't he have healed?
couldn't we have healed?
couldn't you have healed?
couldn't they have healed? 	couldn't I have been healing?
couldn't you have been healing?
couldn't he have been healing?
couldn't we have been healing?
couldn't you have been healing?
couldn't they have been healing?