ought to lack
Regular verb: lack - lacked- lacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to lack
you ought to lack
he ought to lack
we ought to lack
you ought to lack
they ought to lack 	I ought to be lacking
you ought to be lacking
he ought to be lacking
we ought to be lacking
you ought to be lacking
they ought to be lacking	I ought to have lacked
you ought to have lacked
he ought to have lacked
we ought to have lacked
you ought to have lacked
they ought to have lacked	I ought to have been lacking
you ought to have been lacking
he ought to have been lacking
we ought to have been lacking
you ought to have been lacking
they ought to have been lacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to lack
you oughtn't to lack
he oughtn't to lack
we oughtn't to lack
you oughtn't to lack
they oughtn't to lack 	I oughtn't to be lacking
you oughtn't to be lacking
he oughtn't to be lacking
we oughtn't to be lacking
you oughtn't to be lacking
they oughtn't to be lacking	I oughtn't to have lacked
you oughtn't to have lacked
he oughtn't to have lacked
we oughtn't to have lacked
you oughtn't to have lacked
they oughtn't to have lacked	I oughtn't to have been lacking
you oughtn't to have been lacking
he oughtn't to have been lacking
we oughtn't to have been lacking
you oughtn't to have been lacking
they oughtn't to have been lacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I lack?
ought to you lack?
ought to he lack?
ought to we lack?
ought to you lack?
ought to they lack? 	ought to I be lacking?
ought to you be lacking?
ought to he be lacking?
ought to we be lacking?
ought to you be lacking?
ought to they be lacking? 	ought to I have lacked?
ought to you have lacked?
ought to he have lacked?
ought to we have lacked?
ought to you have lacked?
ought to they have lacked? 	ought to I have been lacking?
ought to you have been lacking?
ought to he have been lacking?
ought to we have been lacking?
ought to you have been lacking?
ought to they have been lacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to lack?
oughtn't you to lack?
oughtn't he to lack?
oughtn't we to lack?
oughtn't you to lack?
oughtn't they to lack? 	oughtn't I to be lacking?
oughtn't you to be lacking?
oughtn't he to be lacking?
oughtn't we to be lacking?
oughtn't you to be lacking?
oughtn't they to be lacking? 	oughtn't I to have lacked?
oughtn't you to have lacked?
oughtn't he to have lacked?
oughtn't we to have lacked?
oughtn't you to have lacked?
oughtn't they to have lacked? 	oughtn't I to have been lacking?
oughtn't you to have been lacking?
oughtn't he to have been lacking?
oughtn't we to have been lacking?
oughtn't you to have been lacking?
oughtn't they to have been lacking?