must unhorse
Regular verb: unhorse - unhorsed- unhorsed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unhorse
you must unhorse
he must unhorse
we must unhorse
you must unhorse
they must unhorse 	I must be unhorsing
you must be unhorsing
he must be unhorsing
we must be unhorsing
you must be unhorsing
they must be unhorsing	I must have unhorsed
you must have unhorsed
he must have unhorsed
we must have unhorsed
you must have unhorsed
they must have unhorsed	I must have been unhorsing
you must have been unhorsing
he must have been unhorsing
we must have been unhorsing
you must have been unhorsing
they must have been unhorsing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not unhorse
you must not unhorse
he must not unhorse
we must not unhorse
you must not unhorse
they must not unhorse 	I must not be unhorsing
you must not be unhorsing
he must not be unhorsing
we must not be unhorsing
you must not be unhorsing
they must not be unhorsing	I must not have unhorsed
you must not have unhorsed
he must not have unhorsed
we must not have unhorsed
you must not have unhorsed
they must not have unhorsed	I must not have been unhorsing
you must not have been unhorsing
he must not have been unhorsing
we must not have been unhorsing
you must not have been unhorsing
they must not have been unhorsing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unhorse?
must you unhorse?
must he unhorse?
must we unhorse?
must you unhorse?
must they unhorse? 	must I be unhorsing?
must you be unhorsing?
must he be unhorsing?
must we be unhorsing?
must you be unhorsing?
must they be unhorsing? 	must I have unhorsed?
must you have unhorsed?
must he have unhorsed?
must we have unhorsed?
must you have unhorsed?
must they have unhorsed? 	must I have been unhorsing?
must you have been unhorsing?
must he have been unhorsing?
must we have been unhorsing?
must you have been unhorsing?
must they have been unhorsing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not unhorse?
must you not unhorse?
must he not unhorse?
must we not unhorse?
must you not unhorse?
must they not unhorse? 	must I not be unhorsing?
must you not be unhorsing?
must he not be unhorsing?
must we not be unhorsing?
must you not be unhorsing?
must they not be unhorsing? 	must I not have unhorsed?
must you not have unhorsed?
must he not have unhorsed?
must we not have unhorsed?
must you not have unhorsed?
must they not have unhorsed? 	must I not have been unhorsing?
must you not have been unhorsing?
must he not have been unhorsing?
must we not have been unhorsing?
must you not have been unhorsing?
must they not have been unhorsing?