could harpoon harpoon
Regular verb: harpoon harpoon - harpoon harpooned- harpoon harpooned

, this verb may not exist. Conjugation is given as example.

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't harpoon harpoon
you couldn't harpoon harpoon
he couldn't harpoon harpoon
we couldn't harpoon harpoon
you couldn't harpoon harpoon
they couldn't harpoon harpoon 	I couldn't be harpoon harpooning
you couldn't be harpoon harpooning
he couldn't be harpoon harpooning
we couldn't be harpoon harpooning
you couldn't be harpoon harpooning
they couldn't be harpoon harpooning	I couldn't have harpoon harpooned
you couldn't have harpoon harpooned
he couldn't have harpoon harpooned
we couldn't have harpoon harpooned
you couldn't have harpoon harpooned
they couldn't have harpoon harpooned	I couldn't have been harpoon harpooning
you couldn't have been harpoon harpooning
he couldn't have been harpoon harpooning
we couldn't have been harpoon harpooning
you couldn't have been harpoon harpooning
they couldn't have been harpoon harpooning	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I harpoon harpoon?
couldn't you harpoon harpoon?
couldn't he harpoon harpoon?
couldn't we harpoon harpoon?
couldn't you harpoon harpoon?
couldn't they harpoon harpoon? 	couldn't I be harpoon harpooning?
couldn't you be harpoon harpooning?
couldn't he be harpoon harpooning?
couldn't we be harpoon harpooning?
couldn't you be harpoon harpooning?
couldn't they be harpoon harpooning? 	couldn't I have harpoon harpooned?
couldn't you have harpoon harpooned?
couldn't he have harpoon harpooned?
couldn't we have harpoon harpooned?
couldn't you have harpoon harpooned?
couldn't they have harpoon harpooned? 	couldn't I have been harpoon harpooning?
couldn't you have been harpoon harpooning?
couldn't he have been harpoon harpooning?
couldn't we have been harpoon harpooning?
couldn't you have been harpoon harpooning?
couldn't they have been harpoon harpooning?