must polka
Regular verb: polka - polkaed- polkaed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must polka
you must polka
she must polka
we must polka
you must polka
they must polka 	I must be polkaing
you must be polkaing
she must be polkaing
we must be polkaing
you must be polkaing
they must be polkaing	I must have polkaed
you must have polkaed
she must have polkaed
we must have polkaed
you must have polkaed
they must have polkaed	I must have been polkaing
you must have been polkaing
she must have been polkaing
we must have been polkaing
you must have been polkaing
they must have been polkaing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not polka
you must not polka
she must not polka
we must not polka
you must not polka
they must not polka 	I must not be polkaing
you must not be polkaing
she must not be polkaing
we must not be polkaing
you must not be polkaing
they must not be polkaing	I must not have polkaed
you must not have polkaed
she must not have polkaed
we must not have polkaed
you must not have polkaed
they must not have polkaed	I must not have been polkaing
you must not have been polkaing
she must not have been polkaing
we must not have been polkaing
you must not have been polkaing
they must not have been polkaing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I polka?
must you polka?
must she polka?
must we polka?
must you polka?
must they polka? 	must I be polkaing?
must you be polkaing?
must she be polkaing?
must we be polkaing?
must you be polkaing?
must they be polkaing? 	must I have polkaed?
must you have polkaed?
must she have polkaed?
must we have polkaed?
must you have polkaed?
must they have polkaed? 	must I have been polkaing?
must you have been polkaing?
must she have been polkaing?
must we have been polkaing?
must you have been polkaing?
must they have been polkaing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not polka?
must you not polka?
must she not polka?
must we not polka?
must you not polka?
must they not polka? 	must I not be polkaing?
must you not be polkaing?
must she not be polkaing?
must we not be polkaing?
must you not be polkaing?
must they not be polkaing? 	must I not have polkaed?
must you not have polkaed?
must she not have polkaed?
must we not have polkaed?
must you not have polkaed?
must they not have polkaed? 	must I not have been polkaing?
must you not have been polkaing?
must she not have been polkaing?
must we not have been polkaing?
must you not have been polkaing?
must they not have been polkaing?