English verb conjugation
COULD BAN

Regular verb: ban - banned - banned

Affirmation

Simple form	V-ing form
I could ban you could ban she could ban we could ban you could ban they could ban	I could be banning you could be banning she could be banning we could be banning you could be banning they could be banning
Perfect	V-ing perfect
I could have banned you could have banned she could have banned we could have banned you could have banned they could have banned	I could have been banning you could have been banning she could have been banning we could have been banning you could have been banning they could have been banning

Negation

Simple form	V-ing form
I couldn't ban you couldn't ban she couldn't ban we couldn't ban you couldn't ban they couldn't ban	I couldn't be banning you couldn't be banning she couldn't be banning we couldn't be banning you couldn't be banning they couldn't be banning
Perfect	V-ing perfect
I couldn't have banned you couldn't have banned she couldn't have banned we couldn't have banned you couldn't have banned they couldn't have banned	I couldn't have been banning you couldn't have been banning she couldn't have been banning we couldn't have been banning you couldn't have been banning they couldn't have been banning

Interrogative form

Simple form	V-ing form
could I ban? could you ban? could she ban? could we ban? could you ban? could they ban?	could I be banning? could you be banning? could she be banning? could we be banning? could you be banning? could they be banning?
Perfect	V-ing perfect
could I have banned? could you have banned? could she have banned? could we have banned? could you have banned? could they have banned?	could I have been banning? could you have been banning? could she have been banning? could we have been banning? could you have been banning? could they have been banning?

Interro-negative form

Simple form	V-ing form
couldn't I ban? couldn't you ban? couldn't she ban? couldn't we ban? couldn't you ban? couldn't they ban?	couldn't I be banning? couldn't you be banning? couldn't she be banning? couldn't we be banning? couldn't you be banning? couldn't they be banning?
Perfect	V-ing perfect
couldn't I have banned? couldn't you have banned? couldn't she have banned? couldn't we have banned? couldn't you have banned? couldn't they have banned?	couldn't I have been banning? couldn't you have been banning? couldn't she have been banning? couldn't we have been banning? couldn't you have been banning? couldn't they have been banning?