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 couldn't polka you couldn't polka he couldn't polka we couldn't polka you couldn't polka they couldn't polka	I couldn't be polkaing you couldn't be polkaing he couldn't be polkaing we couldn't be polkaing you couldn't be polkaing they couldn't be polkaing
Perfect	V-ing perfect
I couldn't have polkaed you couldn't have polkaed he couldn't have polkaed we couldn't have polkaed you couldn't have polkaed they couldn't have polkaed	I couldn't have been polkaing you couldn't have been polkaing he couldn't have been polkaing we couldn't have been polkaing you couldn't have been polkaing they couldn't 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
couldn't I polka? couldn't you polka? couldn't he polka? couldn't we polka? couldn't you polka? couldn't they polka?	couldn't I be polkaing? couldn't you be polkaing? couldn't he be polkaing? couldn't we be polkaing? couldn't you be polkaing? couldn't they be polkaing?
Perfect	V-ing perfect
couldn't I have polkaed? couldn't you have polkaed? couldn't he have polkaed? couldn't we have polkaed? couldn't you have polkaed? couldn't they have polkaed?	couldn't I have been polkaing? couldn't you have been polkaing? couldn't he have been polkaing? couldn't we have been polkaing? couldn't you have been polkaing? couldn't they have been polkaing?