can umpire
Regular verb: umpire - umpired- umpired

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't umpire
you can't umpire
he can't umpire
we can't umpire
you can't umpire
they can't umpire 	I can't be umpiring
you can't be umpiring
he can't be umpiring
we can't be umpiring
you can't be umpiring
they can't be umpiring	I can't have umpired
you can't have umpired
he can't have umpired
we can't have umpired
you can't have umpired
they can't have umpired	I can't have been umpiring
you can't have been umpiring
he can't have been umpiring
we can't have been umpiring
you can't have been umpiring
they can't have been umpiring	

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

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