must unship
Regular verb: unship - unshipped- unshipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unship
you must unship
he must unship
we must unship
you must unship
they must unship 	I must be unshipping
you must be unshipping
he must be unshipping
we must be unshipping
you must be unshipping
they must be unshipping	I must have unshipped
you must have unshipped
he must have unshipped
we must have unshipped
you must have unshipped
they must have unshipped	I must have been unshipping
you must have been unshipping
he must have been unshipping
we must have been unshipping
you must have been unshipping
they must have been unshipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unship
you mustn't unship
he mustn't unship
we mustn't unship
you mustn't unship
they mustn't unship 	I mustn't be unshipping
you mustn't be unshipping
he mustn't be unshipping
we mustn't be unshipping
you mustn't be unshipping
they mustn't be unshipping	I mustn't have unshipped
you mustn't have unshipped
he mustn't have unshipped
we mustn't have unshipped
you mustn't have unshipped
they mustn't have unshipped	I mustn't have been unshipping
you mustn't have been unshipping
he mustn't have been unshipping
we mustn't have been unshipping
you mustn't have been unshipping
they mustn't have been unshipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unship?
must you unship?
must he unship?
must we unship?
must you unship?
must they unship? 	must I be unshipping?
must you be unshipping?
must he be unshipping?
must we be unshipping?
must you be unshipping?
must they be unshipping? 	must I have unshipped?
must you have unshipped?
must he have unshipped?
must we have unshipped?
must you have unshipped?
must they have unshipped? 	must I have been unshipping?
must you have been unshipping?
must he have been unshipping?
must we have been unshipping?
must you have been unshipping?
must they have been unshipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unship?
mustn't you unship?
mustn't he unship?
mustn't we unship?
mustn't you unship?
mustn't they unship? 	mustn't I be unshipping?
mustn't you be unshipping?
mustn't he be unshipping?
mustn't we be unshipping?
mustn't you be unshipping?
mustn't they be unshipping? 	mustn't I have unshipped?
mustn't you have unshipped?
mustn't he have unshipped?
mustn't we have unshipped?
mustn't you have unshipped?
mustn't they have unshipped? 	mustn't I have been unshipping?
mustn't you have been unshipping?
mustn't he have been unshipping?
mustn't we have been unshipping?
mustn't you have been unshipping?
mustn't they have been unshipping?