could harpoon
Regular verb: harpoon - harpooned- harpooned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could harpoon
you could harpoon
she could harpoon
we could harpoon
you could harpoon
they could harpoon 	I could be harpooning
you could be harpooning
she could be harpooning
we could be harpooning
you could be harpooning
they could be harpooning	I could have harpooned
you could have harpooned
she could have harpooned
we could have harpooned
you could have harpooned
they could have harpooned	I could have been harpooning
you could have been harpooning
she could have been harpooning
we could have been harpooning
you could have been harpooning
they could have been harpooning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not harpoon
you could not harpoon
she could not harpoon
we could not harpoon
you could not harpoon
they could not harpoon 	I could not be harpooning
you could not be harpooning
she could not be harpooning
we could not be harpooning
you could not be harpooning
they could not be harpooning	I could not have harpooned
you could not have harpooned
she could not have harpooned
we could not have harpooned
you could not have harpooned
they could not have harpooned	I could not have been harpooning
you could not have been harpooning
she could not have been harpooning
we could not have been harpooning
you could not have been harpooning
they could not have been harpooning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I harpoon?
could you harpoon?
could she harpoon?
could we harpoon?
could you harpoon?
could they harpoon? 	could I be harpooning?
could you be harpooning?
could she be harpooning?
could we be harpooning?
could you be harpooning?
could they be harpooning? 	could I have harpooned?
could you have harpooned?
could she have harpooned?
could we have harpooned?
could you have harpooned?
could they have harpooned? 	could I have been harpooning?
could you have been harpooning?
could she have been harpooning?
could we have been harpooning?
could you have been harpooning?
could they have been harpooning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not harpoon?
could you not harpoon?
could she not harpoon?
could we not harpoon?
could you not harpoon?
could they not harpoon? 	could I not be harpooning?
could you not be harpooning?
could she not be harpooning?
could we not be harpooning?
could you not be harpooning?
could they not be harpooning? 	could I not have harpooned?
could you not have harpooned?
could she not have harpooned?
could we not have harpooned?
could you not have harpooned?
could they not have harpooned? 	could I not have been harpooning?
could you not have been harpooning?
could she not have been harpooning?
could we not have been harpooning?
could you not have been harpooning?
could they not have been harpooning?