English verb conjugation
MUST UMPIRE

Regular verb: umpire - umpired - umpired

Affirmation

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

Interrogative form

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