ought to pipe
Regular verb: pipe - piped- piped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to pipe
you ought to pipe
she ought to pipe
we ought to pipe
you ought to pipe
they ought to pipe 	I ought to be piping
you ought to be piping
she ought to be piping
we ought to be piping
you ought to be piping
they ought to be piping	I ought to have piped
you ought to have piped
she ought to have piped
we ought to have piped
you ought to have piped
they ought to have piped	I ought to have been piping
you ought to have been piping
she ought to have been piping
we ought to have been piping
you ought to have been piping
they ought to have been piping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to pipe
you ought not to pipe
she ought not to pipe
we ought not to pipe
you ought not to pipe
they ought not to pipe 	I ought not to piping
you ought not to piping
she ought not to piping
we ought not to piping
you ought not to piping
they ought not to piping	I ought not to have piped
you ought not to have piped
she ought not to have piped
we ought not to have piped
you ought not to have piped
they ought not to have piped	I ought not to have been piping
you ought not to have been piping
she ought not to have been piping
we ought not to have been piping
you ought not to have been piping
they ought not to have been piping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I pipe?
ought to you pipe?
ought to she pipe?
ought to we pipe?
ought to you pipe?
ought to they pipe? 	ought to I be piping?
ought to you be piping?
ought to she be piping?
ought to we be piping?
ought to you be piping?
ought to they be piping? 	ought to I have piped?
ought to you have piped?
ought to she have piped?
ought to we have piped?
ought to you have piped?
ought to they have piped? 	ought to I have been piping?
ought to you have been piping?
ought to she have been piping?
ought to we have been piping?
ought to you have been piping?
ought to they have been piping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to pipe?
ought you not to pipe?
ought she not to pipe?
ought we not to pipe?
ought you not to pipe?
ought they not to pipe? 	ought I not to be piping?
ought you not to be piping?
ought she not to be piping?
ought we not to be piping?
ought you not to be piping?
ought they not to be piping? 	ought I not to have piped?
ought you not to have piped?
ought she not to have piped?
ought we not to have piped?
ought you not to have piped?
ought they not to have piped? 	ought I not to have been piping?
ought you not to have been piping?
ought she not to have been piping?
ought we not to have been piping?
ought you not to have been piping?
ought they not to have been piping?