ought to stratify
Regular verb: stratify - stratified- stratified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to stratify
you ought to stratify
he ought to stratify
we ought to stratify
you ought to stratify
they ought to stratify 	I ought to be stratifying
you ought to be stratifying
he ought to be stratifying
we ought to be stratifying
you ought to be stratifying
they ought to be stratifying	I ought to have stratified
you ought to have stratified
he ought to have stratified
we ought to have stratified
you ought to have stratified
they ought to have stratified	I ought to have been stratifying
you ought to have been stratifying
he ought to have been stratifying
we ought to have been stratifying
you ought to have been stratifying
they ought to have been stratifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to stratify
you oughtn't to stratify
he oughtn't to stratify
we oughtn't to stratify
you oughtn't to stratify
they oughtn't to stratify 	I oughtn't to be stratifying
you oughtn't to be stratifying
he oughtn't to be stratifying
we oughtn't to be stratifying
you oughtn't to be stratifying
they oughtn't to be stratifying	I oughtn't to have stratified
you oughtn't to have stratified
he oughtn't to have stratified
we oughtn't to have stratified
you oughtn't to have stratified
they oughtn't to have stratified	I oughtn't to have been stratifying
you oughtn't to have been stratifying
he oughtn't to have been stratifying
we oughtn't to have been stratifying
you oughtn't to have been stratifying
they oughtn't to have been stratifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I stratify?
ought to you stratify?
ought to he stratify?
ought to we stratify?
ought to you stratify?
ought to they stratify? 	ought to I be stratifying?
ought to you be stratifying?
ought to he be stratifying?
ought to we be stratifying?
ought to you be stratifying?
ought to they be stratifying? 	ought to I have stratified?
ought to you have stratified?
ought to he have stratified?
ought to we have stratified?
ought to you have stratified?
ought to they have stratified? 	ought to I have been stratifying?
ought to you have been stratifying?
ought to he have been stratifying?
ought to we have been stratifying?
ought to you have been stratifying?
ought to they have been stratifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to stratify?
oughtn't you to stratify?
oughtn't he to stratify?
oughtn't we to stratify?
oughtn't you to stratify?
oughtn't they to stratify? 	oughtn't I to be stratifying?
oughtn't you to be stratifying?
oughtn't he to be stratifying?
oughtn't we to be stratifying?
oughtn't you to be stratifying?
oughtn't they to be stratifying? 	oughtn't I to have stratified?
oughtn't you to have stratified?
oughtn't he to have stratified?
oughtn't we to have stratified?
oughtn't you to have stratified?
oughtn't they to have stratified? 	oughtn't I to have been stratifying?
oughtn't you to have been stratifying?
oughtn't he to have been stratifying?
oughtn't we to have been stratifying?
oughtn't you to have been stratifying?
oughtn't they to have been stratifying?