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 mustn't harpoon
you mustn't harpoon
she mustn't harpoon
we mustn't harpoon
you mustn't harpoon
they mustn't harpoon 	I mustn't be harpooning
you mustn't be harpooning
she mustn't be harpooning
we mustn't be harpooning
you mustn't be harpooning
they mustn't be harpooning	I mustn't have harpooned
you mustn't have harpooned
she mustn't have harpooned
we mustn't have harpooned
you mustn't have harpooned
they mustn't have harpooned	I mustn't have been harpooning
you mustn't have been harpooning
she mustn't have been harpooning
we mustn't have been harpooning
you mustn't have been harpooning
they mustn't 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 	
mustn't I harpoon?
mustn't you harpoon?
mustn't she harpoon?
mustn't we harpoon?
mustn't you harpoon?
mustn't they harpoon? 	mustn't I be harpooning?
mustn't you be harpooning?
mustn't she be harpooning?
mustn't we be harpooning?
mustn't you be harpooning?
mustn't they be harpooning? 	mustn't I have harpooned?
mustn't you have harpooned?
mustn't she have harpooned?
mustn't we have harpooned?
mustn't you have harpooned?
mustn't they have harpooned? 	mustn't I have been harpooning?
mustn't you have been harpooning?
mustn't she have been harpooning?
mustn't we have been harpooning?
mustn't you have been harpooning?
mustn't they have been harpooning?