English verb conjugation
MUST SPIRE

Regular verb: spire - spired - spired

Affirmation

Simple form	V-ing form
I must spire you must spire he must spire we must spire you must spire they must spire	I must be spiring you must be spiring he must be spiring we must be spiring you must be spiring they must be spiring
Perfect	V-ing perfect
I must have spired you must have spired he must have spired we must have spired you must have spired they must have spired	I must have been spiring you must have been spiring he must have been spiring we must have been spiring you must have been spiring they must have been spiring

Negation

Simple form	V-ing form
I must not spire you must not spire he must not spire we must not spire you must not spire they must not spire	I must not be spiring you must not be spiring he must not be spiring we must not be spiring you must not be spiring they must not be spiring
Perfect	V-ing perfect
I must not have spired you must not have spired he must not have spired we must not have spired you must not have spired they must not have spired	I must not have been spiring you must not have been spiring he must not have been spiring we must not have been spiring you must not have been spiring they must not have been spiring

Interrogative form

Simple form	V-ing form
must I spire? must you spire? must he spire? must we spire? must you spire? must they spire?	must I be spiring? must you be spiring? must he be spiring? must we be spiring? must you be spiring? must they be spiring?
Perfect	V-ing perfect
must I have spired? must you have spired? must he have spired? must we have spired? must you have spired? must they have spired?	must I have been spiring? must you have been spiring? must he have been spiring? must we have been spiring? must you have been spiring? must they have been spiring?

Interro-negative form

Simple form	V-ing form
must I not spire? must you not spire? must he not spire? must we not spire? must you not spire? must they not spire?	must I not be spiring? must you not be spiring? must he not be spiring? must we not be spiring? must you not be spiring? must they not be spiring?
Perfect	V-ing perfect
must I not have spired? must you not have spired? must he not have spired? must we not have spired? must you not have spired? must they not have spired?	must I not have been spiring? must you not have been spiring? must he not have been spiring? must we not have been spiring? must you not have been spiring? must they not have been spiring?