could umpire
Verbe régulier : umpire - umpired- umpired
Traduction française : arbitrer - servir d'arbitre 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could umpire
you could umpire
he could umpire
we could umpire
you could umpire
they could umpire 	I could be umpiring
you could be umpiring
he could be umpiring
we could be umpiring
you could be umpiring
they could be umpiring	I could have umpired
you could have umpired
he could have umpired
we could have umpired
you could have umpired
they could have umpired	I could have been umpiring
you could have been umpiring
he could have been umpiring
we could have been umpiring
you could have been umpiring
they could have been umpiring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't umpire
you couldn't umpire
he couldn't umpire
we couldn't umpire
you couldn't umpire
they couldn't umpire 	I couldn't be umpiring
you couldn't be umpiring
he couldn't be umpiring
we couldn't be umpiring
you couldn't be umpiring
they couldn't be umpiring	I couldn't have umpired
you couldn't have umpired
he couldn't have umpired
we couldn't have umpired
you couldn't have umpired
they couldn't have umpired	I couldn't have been umpiring
you couldn't have been umpiring
he couldn't have been umpiring
we couldn't have been umpiring
you couldn't have been umpiring
they couldn't have been umpiring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I umpire?
could you umpire?
could he umpire?
could we umpire?
could you umpire?
could they umpire? 	could I be umpiring?
could you be umpiring?
could he be umpiring?
could we be umpiring?
could you be umpiring?
could they be umpiring? 	could I have umpired?
could you have umpired?
could he have umpired?
could we have umpired?
could you have umpired?
could they have umpired? 	could I have been umpiring?
could you have been umpiring?
could he have been umpiring?
could we have been umpiring?
could you have been umpiring?
could they have been umpiring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I umpire?
couldn't you umpire?
couldn't he umpire?
couldn't we umpire?
couldn't you umpire?
couldn't they umpire? 	couldn't I be umpiring?
couldn't you be umpiring?
couldn't he be umpiring?
couldn't we be umpiring?
couldn't you be umpiring?
couldn't they be umpiring? 	couldn't I have umpired?
couldn't you have umpired?
couldn't he have umpired?
couldn't we have umpired?
couldn't you have umpired?
couldn't they have umpired? 	couldn't I have been umpiring?
couldn't you have been umpiring?
couldn't he have been umpiring?
couldn't we have been umpiring?
couldn't you have been umpiring?
couldn't they have been umpiring?