English verb conjugation
COULD SQUARE-DANCE

Regular verb: square-dance - square-danced - square-danced

Affirmation

Simple form	V-ing form
I could square-dance you could square-dance she could square-dance we could square-dance you could square-dance they could square-dance	I could be square-dancing you could be square-dancing she could be square-dancing we could be square-dancing you could be square-dancing they could be square-dancing
Perfect	V-ing perfect
I could have square-danced you could have square-danced she could have square-danced we could have square-danced you could have square-danced they could have square-danced	I could have been square-dancing you could have been square-dancing she could have been square-dancing we could have been square-dancing you could have been square-dancing they could have been square-dancing

Negation

Simple form	V-ing form
I couldn't square-dance you couldn't square-dance she couldn't square-dance we couldn't square-dance you couldn't square-dance they couldn't square-dance	I couldn't be square-dancing you couldn't be square-dancing she couldn't be square-dancing we couldn't be square-dancing you couldn't be square-dancing they couldn't be square-dancing
Perfect	V-ing perfect
I couldn't have square-danced you couldn't have square-danced she couldn't have square-danced we couldn't have square-danced you couldn't have square-danced they couldn't have square-danced	I couldn't have been square-dancing you couldn't have been square-dancing she couldn't have been square-dancing we couldn't have been square-dancing you couldn't have been square-dancing they couldn't have been square-dancing

Interrogative form

Simple form	V-ing form
could I square-dance? could you square-dance? could she square-dance? could we square-dance? could you square-dance? could they square-dance?	could I be square-dancing? could you be square-dancing? could she be square-dancing? could we be square-dancing? could you be square-dancing? could they be square-dancing?
Perfect	V-ing perfect
could I have square-danced? could you have square-danced? could she have square-danced? could we have square-danced? could you have square-danced? could they have square-danced?	could I have been square-dancing? could you have been square-dancing? could she have been square-dancing? could we have been square-dancing? could you have been square-dancing? could they have been square-dancing?

Interro-negative form

Simple form	V-ing form
couldn't I square-dance? couldn't you square-dance? couldn't she square-dance? couldn't we square-dance? couldn't you square-dance? couldn't they square-dance?	couldn't I be square-dancing? couldn't you be square-dancing? couldn't she be square-dancing? couldn't we be square-dancing? couldn't you be square-dancing? couldn't they be square-dancing?
Perfect	V-ing perfect
couldn't I have square-danced? couldn't you have square-danced? couldn't she have square-danced? couldn't we have square-danced? couldn't you have square-danced? couldn't they have square-danced?	couldn't I have been square-dancing? couldn't you have been square-dancing? couldn't she have been square-dancing? couldn't we have been square-dancing? couldn't you have been square-dancing? couldn't they have been square-dancing?