must umpire
Regular verb: umpire - umpired- umpired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must umpire
you must umpire
he must umpire
we must umpire
you must umpire
they must umpire 	I must be umpiring
you must be umpiring
he must be umpiring
we must be umpiring
you must be umpiring
they must be umpiring	I must have umpired
you must have umpired
he must have umpired
we must have umpired
you must have umpired
they must have umpired	I must have been umpiring
you must have been umpiring
he must have been umpiring
we must have been umpiring
you must have been umpiring
they must have been umpiring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not umpire
you must not umpire
he must not umpire
we must not umpire
you must not umpire
they must not umpire 	I must not be umpiring
you must not be umpiring
he must not be umpiring
we must not be umpiring
you must not be umpiring
they must not be umpiring	I must not have umpired
you must not have umpired
he must not have umpired
we must not have umpired
you must not have umpired
they must not have umpired	I must not have been umpiring
you must not have been umpiring
he must not have been umpiring
we must not have been umpiring
you must not have been umpiring
they must not have been umpiring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I umpire?
must you umpire?
must he umpire?
must we umpire?
must you umpire?
must they umpire? 	must I be umpiring?
must you be umpiring?
must he be umpiring?
must we be umpiring?
must you be umpiring?
must they be umpiring? 	must I have umpired?
must you have umpired?
must he have umpired?
must we have umpired?
must you have umpired?
must they have umpired? 	must I have been umpiring?
must you have been umpiring?
must he have been umpiring?
must we have been umpiring?
must you have been umpiring?
must they have been umpiring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not umpire?
must you not umpire?
must he not umpire?
must we not umpire?
must you not umpire?
must they not umpire? 	must I not be umpiring?
must you not be umpiring?
must he not be umpiring?
must we not be umpiring?
must you not be umpiring?
must they not be umpiring? 	must I not have umpired?
must you not have umpired?
must he not have umpired?
must we not have umpired?
must you not have umpired?
must they not have umpired? 	must I not have been umpiring?
must you not have been umpiring?
must he not have been umpiring?
must we not have been umpiring?
must you not have been umpiring?
must they not have been umpiring?