English verb conjugation
COULD HAP

Regular verb: hap - haped - haped

Affirmation

Simple form	V-ing form
I could hap you could hap he could hap we could hap you could hap they could hap	I could be haping you could be haping he could be haping we could be haping you could be haping they could be haping
Perfect	V-ing perfect
I could have haped you could have haped he could have haped we could have haped you could have haped they could have haped	I could have been haping you could have been haping he could have been haping we could have been haping you could have been haping they could have been haping

Negation

Simple form	V-ing form
I could not hap you could not hap he could not hap we could not hap you could not hap they could not hap	I could not be haping you could not be haping he could not be haping we could not be haping you could not be haping they could not be haping
Perfect	V-ing perfect
I could not have haped you could not have haped he could not have haped we could not have haped you could not have haped they could not have haped	I could not have been haping you could not have been haping he could not have been haping we could not have been haping you could not have been haping they could not have been haping

Interrogative form

Simple form	V-ing form
could I hap? could you hap? could he hap? could we hap? could you hap? could they hap?	could I be haping? could you be haping? could he be haping? could we be haping? could you be haping? could they be haping?
Perfect	V-ing perfect
could I have haped? could you have haped? could he have haped? could we have haped? could you have haped? could they have haped?	could I have been haping? could you have been haping? could he have been haping? could we have been haping? could you have been haping? could they have been haping?

Interro-negative form

Simple form	V-ing form
could I not hap? could you not hap? could he not hap? could we not hap? could you not hap? could they not hap?	could I not be haping? could you not be haping? could he not be haping? could we not be haping? could you not be haping? could they not be haping?
Perfect	V-ing perfect
could I not have haped? could you not have haped? could he not have haped? could we not have haped? could you not have haped? could they not have haped?	could I not have been haping? could you not have been haping? could he not have been haping? could we not have been haping? could you not have been haping? could they not have been haping?