English verb conjugation
OUGHT TO LENGTHEN

Regular verb: lengthen - lengthened - lengthened

Affirmation

Simple form	V-ing form
I ought to lengthen you ought to lengthen he ought to lengthen we ought to lengthen you ought to lengthen they ought to lengthen	I ought to be lengthening you ought to be lengthening he ought to be lengthening we ought to be lengthening you ought to be lengthening they ought to be lengthening
Perfect	V-ing perfect
I ought to have lengthened you ought to have lengthened he ought to have lengthened we ought to have lengthened you ought to have lengthened they ought to have lengthened	I ought to have been lengthening you ought to have been lengthening he ought to have been lengthening we ought to have been lengthening you ought to have been lengthening they ought to have been lengthening

Negation

Simple form	V-ing form
I oughtn't to lengthen you oughtn't to lengthen he oughtn't to lengthen we oughtn't to lengthen you oughtn't to lengthen they oughtn't to lengthen	I oughtn't to be lengthening you oughtn't to be lengthening he oughtn't to be lengthening we oughtn't to be lengthening you oughtn't to be lengthening they oughtn't to be lengthening
Perfect	V-ing perfect
I oughtn't to have lengthened you oughtn't to have lengthened he oughtn't to have lengthened we oughtn't to have lengthened you oughtn't to have lengthened they oughtn't to have lengthened	I oughtn't to have been lengthening you oughtn't to have been lengthening he oughtn't to have been lengthening we oughtn't to have been lengthening you oughtn't to have been lengthening they oughtn't to have been lengthening

Interrogative form

Simple form	V-ing form
ought to I lengthen? ought to you lengthen? ought to he lengthen? ought to we lengthen? ought to you lengthen? ought to they lengthen?	ought to I be lengthening? ought to you be lengthening? ought to he be lengthening? ought to we be lengthening? ought to you be lengthening? ought to they be lengthening?
Perfect	V-ing perfect
ought to I have lengthened? ought to you have lengthened? ought to he have lengthened? ought to we have lengthened? ought to you have lengthened? ought to they have lengthened?	ought to I have been lengthening? ought to you have been lengthening? ought to he have been lengthening? ought to we have been lengthening? ought to you have been lengthening? ought to they have been lengthening?

Interro-negative form

Simple form	V-ing form
oughtn't I to lengthen? oughtn't you to lengthen? oughtn't he to lengthen? oughtn't we to lengthen? oughtn't you to lengthen? oughtn't they to lengthen?	oughtn't I to be lengthening? oughtn't you to be lengthening? oughtn't he to be lengthening? oughtn't we to be lengthening? oughtn't you to be lengthening? oughtn't they to be lengthening?
Perfect	V-ing perfect
oughtn't I to have lengthened? oughtn't you to have lengthened? oughtn't he to have lengthened? oughtn't we to have lengthened? oughtn't you to have lengthened? oughtn't they to have lengthened?	oughtn't I to have been lengthening? oughtn't you to have been lengthening? oughtn't he to have been lengthening? oughtn't we to have been lengthening? oughtn't you to have been lengthening? oughtn't they to have been lengthening?