English verb conjugation
COULD POLKA

Regular verb: polka - polkaed - polkaed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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