ought to postdate
Regular verb: postdate - postdated- postdated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to postdate
you ought to postdate
he ought to postdate
we ought to postdate
you ought to postdate
they ought to postdate 	I ought to be postdating
you ought to be postdating
he ought to be postdating
we ought to be postdating
you ought to be postdating
they ought to be postdating	I ought to have postdated
you ought to have postdated
he ought to have postdated
we ought to have postdated
you ought to have postdated
they ought to have postdated	I ought to have been postdating
you ought to have been postdating
he ought to have been postdating
we ought to have been postdating
you ought to have been postdating
they ought to have been postdating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to postdate
you ought not to postdate
he ought not to postdate
we ought not to postdate
you ought not to postdate
they ought not to postdate 	I ought not to postdating
you ought not to postdating
he ought not to postdating
we ought not to postdating
you ought not to postdating
they ought not to postdating	I ought not to have postdated
you ought not to have postdated
he ought not to have postdated
we ought not to have postdated
you ought not to have postdated
they ought not to have postdated	I ought not to have been postdating
you ought not to have been postdating
he ought not to have been postdating
we ought not to have been postdating
you ought not to have been postdating
they ought not to have been postdating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I postdate?
ought to you postdate?
ought to he postdate?
ought to we postdate?
ought to you postdate?
ought to they postdate? 	ought to I be postdating?
ought to you be postdating?
ought to he be postdating?
ought to we be postdating?
ought to you be postdating?
ought to they be postdating? 	ought to I have postdated?
ought to you have postdated?
ought to he have postdated?
ought to we have postdated?
ought to you have postdated?
ought to they have postdated? 	ought to I have been postdating?
ought to you have been postdating?
ought to he have been postdating?
ought to we have been postdating?
ought to you have been postdating?
ought to they have been postdating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to postdate?
ought you not to postdate?
ought he not to postdate?
ought we not to postdate?
ought you not to postdate?
ought they not to postdate? 	ought I not to be postdating?
ought you not to be postdating?
ought he not to be postdating?
ought we not to be postdating?
ought you not to be postdating?
ought they not to be postdating? 	ought I not to have postdated?
ought you not to have postdated?
ought he not to have postdated?
ought we not to have postdated?
ought you not to have postdated?
ought they not to have postdated? 	ought I not to have been postdating?
ought you not to have been postdating?
ought he not to have been postdating?
ought we not to have been postdating?
ought you not to have been postdating?
ought they not to have been postdating?