can polka
Regular verb: polka - polkaed- polkaed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot polka
you cannot polka
he cannot polka
we cannot polka
you cannot polka
they cannot polka 	I cannot be polkaing
you cannot be polkaing
he cannot be polkaing
we cannot be polkaing
you cannot be polkaing
they cannot be polkaing	I cannot have polkaed
you cannot have polkaed
he cannot have polkaed
we cannot have polkaed
you cannot have polkaed
they cannot have polkaed	I cannot have been polkaing
you cannot have been polkaing
he cannot have been polkaing
we cannot have been polkaing
you cannot have been polkaing
they cannot have been polkaing	

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

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