English verb conjugation
COULD JEST

Regular verb: jest - jested - jested

Affirmation

Simple form	V-ing form
I could jest you could jest he could jest we could jest you could jest they could jest	I could be jesting you could be jesting he could be jesting we could be jesting you could be jesting they could be jesting
Perfect	V-ing perfect
I could have jested you could have jested he could have jested we could have jested you could have jested they could have jested	I could have been jesting you could have been jesting he could have been jesting we could have been jesting you could have been jesting they could have been jesting

Negation

Simple form	V-ing form
I could not jest you could not jest he could not jest we could not jest you could not jest they could not jest	I could not be jesting you could not be jesting he could not be jesting we could not be jesting you could not be jesting they could not be jesting
Perfect	V-ing perfect
I could not have jested you could not have jested he could not have jested we could not have jested you could not have jested they could not have jested	I could not have been jesting you could not have been jesting he could not have been jesting we could not have been jesting you could not have been jesting they could not have been jesting

Interrogative form

Simple form	V-ing form
could I jest? could you jest? could he jest? could we jest? could you jest? could they jest?	could I be jesting? could you be jesting? could he be jesting? could we be jesting? could you be jesting? could they be jesting?
Perfect	V-ing perfect
could I have jested? could you have jested? could he have jested? could we have jested? could you have jested? could they have jested?	could I have been jesting? could you have been jesting? could he have been jesting? could we have been jesting? could you have been jesting? could they have been jesting?

Interro-negative form

Simple form	V-ing form
could I not jest? could you not jest? could he not jest? could we not jest? could you not jest? could they not jest?	could I not be jesting? could you not be jesting? could he not be jesting? could we not be jesting? could you not be jesting? could they not be jesting?
Perfect	V-ing perfect
could I not have jested? could you not have jested? could he not have jested? could we not have jested? could you not have jested? could they not have jested?	could I not have been jesting? could you not have been jesting? could he not have been jesting? could we not have been jesting? could you not have been jesting? could they not have been jesting?