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 couldn't hap you couldn't hap he couldn't hap we couldn't hap you couldn't hap they couldn't hap	I couldn't be haping you couldn't be haping he couldn't be haping we couldn't be haping you couldn't be haping they couldn't be haping
Perfect	V-ing perfect
I couldn't have haped you couldn't have haped he couldn't have haped we couldn't have haped you couldn't have haped they couldn't have haped	I couldn't have been haping you couldn't have been haping he couldn't have been haping we couldn't have been haping you couldn't have been haping they couldn't 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
couldn't I hap? couldn't you hap? couldn't he hap? couldn't we hap? couldn't you hap? couldn't they hap?	couldn't I be haping? couldn't you be haping? couldn't he be haping? couldn't we be haping? couldn't you be haping? couldn't they be haping?
Perfect	V-ing perfect
couldn't I have haped? couldn't you have haped? couldn't he have haped? couldn't we have haped? couldn't you have haped? couldn't they have haped?	couldn't I have been haping? couldn't you have been haping? couldn't he have been haping? couldn't we have been haping? couldn't you have been haping? couldn't they have been haping?