could head
Regular verb: head - headed- headed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could head
you could head
he could head
we could head
you could head
they could head 	I could be heading
you could be heading
he could be heading
we could be heading
you could be heading
they could be heading	I could have headed
you could have headed
he could have headed
we could have headed
you could have headed
they could have headed	I could have been heading
you could have been heading
he could have been heading
we could have been heading
you could have been heading
they could have been heading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't head
you couldn't head
he couldn't head
we couldn't head
you couldn't head
they couldn't head 	I couldn't be heading
you couldn't be heading
he couldn't be heading
we couldn't be heading
you couldn't be heading
they couldn't be heading	I couldn't have headed
you couldn't have headed
he couldn't have headed
we couldn't have headed
you couldn't have headed
they couldn't have headed	I couldn't have been heading
you couldn't have been heading
he couldn't have been heading
we couldn't have been heading
you couldn't have been heading
they couldn't have been heading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I head?
could you head?
could he head?
could we head?
could you head?
could they head? 	could I be heading?
could you be heading?
could he be heading?
could we be heading?
could you be heading?
could they be heading? 	could I have headed?
could you have headed?
could he have headed?
could we have headed?
could you have headed?
could they have headed? 	could I have been heading?
could you have been heading?
could he have been heading?
could we have been heading?
could you have been heading?
could they have been heading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I head?
couldn't you head?
couldn't he head?
couldn't we head?
couldn't you head?
couldn't they head? 	couldn't I be heading?
couldn't you be heading?
couldn't he be heading?
couldn't we be heading?
couldn't you be heading?
couldn't they be heading? 	couldn't I have headed?
couldn't you have headed?
couldn't he have headed?
couldn't we have headed?
couldn't you have headed?
couldn't they have headed? 	couldn't I have been heading?
couldn't you have been heading?
couldn't he have been heading?
couldn't we have been heading?
couldn't you have been heading?
couldn't they have been heading?