English verb conjugation
COULD JAPE

Regular verb: jape - japed - japed

Affirmation

Simple form	V-ing form
I could jape you could jape she could jape we could jape you could jape they could jape	I could be japing you could be japing she could be japing we could be japing you could be japing they could be japing
Perfect	V-ing perfect
I could have japed you could have japed she could have japed we could have japed you could have japed they could have japed	I could have been japing you could have been japing she could have been japing we could have been japing you could have been japing they could have been japing

Negation

Simple form	V-ing form
I could not jape you could not jape she could not jape we could not jape you could not jape they could not jape	I could not be japing you could not be japing she could not be japing we could not be japing you could not be japing they could not be japing
Perfect	V-ing perfect
I could not have japed you could not have japed she could not have japed we could not have japed you could not have japed they could not have japed	I could not have been japing you could not have been japing she could not have been japing we could not have been japing you could not have been japing they could not have been japing

Interrogative form

Simple form	V-ing form
could I jape? could you jape? could she jape? could we jape? could you jape? could they jape?	could I be japing? could you be japing? could she be japing? could we be japing? could you be japing? could they be japing?
Perfect	V-ing perfect
could I have japed? could you have japed? could she have japed? could we have japed? could you have japed? could they have japed?	could I have been japing? could you have been japing? could she have been japing? could we have been japing? could you have been japing? could they have been japing?

Interro-negative form

Simple form	V-ing form
could I not jape? could you not jape? could she not jape? could we not jape? could you not jape? could they not jape?	could I not be japing? could you not be japing? could she not be japing? could we not be japing? could you not be japing? could they not be japing?
Perfect	V-ing perfect
could I not have japed? could you not have japed? could she not have japed? could we not have japed? could you not have japed? could they not have japed?	could I not have been japing? could you not have been japing? could she not have been japing? could we not have been japing? could you not have been japing? could they not have been japing?