ought to pi
Regular verb: pi - pied- pied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to pi
you ought to pi
she ought to pi
we ought to pi
you ought to pi
they ought to pi 	I ought to be piing
you ought to be piing
she ought to be piing
we ought to be piing
you ought to be piing
they ought to be piing	I ought to have pied
you ought to have pied
she ought to have pied
we ought to have pied
you ought to have pied
they ought to have pied	I ought to have been piing
you ought to have been piing
she ought to have been piing
we ought to have been piing
you ought to have been piing
they ought to have been piing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to pi
you ought not to pi
she ought not to pi
we ought not to pi
you ought not to pi
they ought not to pi 	I ought not to piing
you ought not to piing
she ought not to piing
we ought not to piing
you ought not to piing
they ought not to piing	I ought not to have pied
you ought not to have pied
she ought not to have pied
we ought not to have pied
you ought not to have pied
they ought not to have pied	I ought not to have been piing
you ought not to have been piing
she ought not to have been piing
we ought not to have been piing
you ought not to have been piing
they ought not to have been piing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I pi?
ought to you pi?
ought to she pi?
ought to we pi?
ought to you pi?
ought to they pi? 	ought to I be piing?
ought to you be piing?
ought to she be piing?
ought to we be piing?
ought to you be piing?
ought to they be piing? 	ought to I have pied?
ought to you have pied?
ought to she have pied?
ought to we have pied?
ought to you have pied?
ought to they have pied? 	ought to I have been piing?
ought to you have been piing?
ought to she have been piing?
ought to we have been piing?
ought to you have been piing?
ought to they have been piing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to pi?
ought you not to pi?
ought she not to pi?
ought we not to pi?
ought you not to pi?
ought they not to pi? 	ought I not to be piing?
ought you not to be piing?
ought she not to be piing?
ought we not to be piing?
ought you not to be piing?
ought they not to be piing? 	ought I not to have pied?
ought you not to have pied?
ought she not to have pied?
ought we not to have pied?
ought you not to have pied?
ought they not to have pied? 	ought I not to have been piing?
ought you not to have been piing?
ought she not to have been piing?
ought we not to have been piing?
ought you not to have been piing?
ought they not to have been piing?