English verb conjugation
COULD JAPE

Regular verb: jape - japed - japed

Affirmation

Simple form	V-ing form
I could jape you could jape he could jape we could jape you could jape they could jape	I could be japing you could be japing he 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 he 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 he 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 couldn't jape you couldn't jape he couldn't jape we couldn't jape you couldn't jape they couldn't jape	I couldn't be japing you couldn't be japing he couldn't be japing we couldn't be japing you couldn't be japing they couldn't be japing
Perfect	V-ing perfect
I couldn't have japed you couldn't have japed he couldn't have japed we couldn't have japed you couldn't have japed they couldn't have japed	I couldn't have been japing you couldn't have been japing he couldn't have been japing we couldn't have been japing you couldn't have been japing they couldn't have been japing

Interrogative form

Simple form	V-ing form
could I jape? could you jape? could he jape? could we jape? could you jape? could they jape?	could I be japing? could you be japing? could he 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 he 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 he 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
couldn't I jape? couldn't you jape? couldn't he jape? couldn't we jape? couldn't you jape? couldn't they jape?	couldn't I be japing? couldn't you be japing? couldn't he be japing? couldn't we be japing? couldn't you be japing? couldn't they be japing?
Perfect	V-ing perfect
couldn't I have japed? couldn't you have japed? couldn't he have japed? couldn't we have japed? couldn't you have japed? couldn't they have japed?	couldn't I have been japing? couldn't you have been japing? couldn't he have been japing? couldn't we have been japing? couldn't you have been japing? couldn't they have been japing?