must harpoon
Regular verb: harpoon - harpooned- harpooned

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

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

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

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