must whir
Regular verb: whir - whired- whired

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