English verb conjugation
MUST WHIR

Regular verb: whir - whired - whired

Affirmation

Simple form	V-ing form
I must whir you must whir he must whir we must whir you must whir they must whir	I must be whiring you must be whiring he must be whiring we must be whiring you must be whiring they must be whiring
Perfect	V-ing perfect
I must have whired you must have whired he must have whired we must have whired you must have whired they must have whired	I must have been whiring you must have been whiring he must have been whiring we must have been whiring you must have been whiring they must have been whiring

Negation

Simple form	V-ing form
I must not whir you must not whir he must not whir we must not whir you must not whir they must not whir	I must not be whiring you must not be whiring he must not be whiring we must not be whiring you must not be whiring they must not be whiring
Perfect	V-ing perfect
I must not have whired you must not have whired he must not have whired we must not have whired you must not have whired they must not have whired	I must not have been whiring you must not have been whiring he must not have been whiring we must not have been whiring you must not have been whiring they must not have been whiring

Interrogative form

Simple form	V-ing form
must I whir? must you whir? must he whir? must we whir? must you whir? must they whir?	must I be whiring? must you be whiring? must he be whiring? must we be whiring? must you be whiring? must they be whiring?
Perfect	V-ing perfect
must I have whired? must you have whired? must he have whired? must we have whired? must you have whired? must they have whired?	must I have been whiring? must you have been whiring? must he have been whiring? must we have been whiring? must you have been whiring? must they have been whiring?

Interro-negative form

Simple form	V-ing form
must I not whir? must you not whir? must he not whir? must we not whir? must you not whir? must they not whir?	must I not be whiring? must you not be whiring? must he not be whiring? must we not be whiring? must you not be whiring? must they not be whiring?
Perfect	V-ing perfect
must I not have whired? must you not have whired? must he not have whired? must we not have whired? must you not have whired? must they not have whired?	must I not have been whiring? must you not have been whiring? must he not have been whiring? must we not have been whiring? must you not have been whiring? must they not have been whiring?