English verb conjugation
OUGHT TO SUSTAIN

Regular verb: sustain - sustained - sustained

Affirmation

Simple form	V-ing form
I ought to sustain you ought to sustain he ought to sustain we ought to sustain you ought to sustain they ought to sustain	I ought to be sustaining you ought to be sustaining he ought to be sustaining we ought to be sustaining you ought to be sustaining they ought to be sustaining
Perfect	V-ing perfect
I ought to have sustained you ought to have sustained he ought to have sustained we ought to have sustained you ought to have sustained they ought to have sustained	I ought to have been sustaining you ought to have been sustaining he ought to have been sustaining we ought to have been sustaining you ought to have been sustaining they ought to have been sustaining

Negation

Simple form	V-ing form
I oughtn't to sustain you oughtn't to sustain he oughtn't to sustain we oughtn't to sustain you oughtn't to sustain they oughtn't to sustain	I oughtn't to be sustaining you oughtn't to be sustaining he oughtn't to be sustaining we oughtn't to be sustaining you oughtn't to be sustaining they oughtn't to be sustaining
Perfect	V-ing perfect
I oughtn't to have sustained you oughtn't to have sustained he oughtn't to have sustained we oughtn't to have sustained you oughtn't to have sustained they oughtn't to have sustained	I oughtn't to have been sustaining you oughtn't to have been sustaining he oughtn't to have been sustaining we oughtn't to have been sustaining you oughtn't to have been sustaining they oughtn't to have been sustaining

Interrogative form

Simple form	V-ing form
ought to I sustain? ought to you sustain? ought to he sustain? ought to we sustain? ought to you sustain? ought to they sustain?	ought to I be sustaining? ought to you be sustaining? ought to he be sustaining? ought to we be sustaining? ought to you be sustaining? ought to they be sustaining?
Perfect	V-ing perfect
ought to I have sustained? ought to you have sustained? ought to he have sustained? ought to we have sustained? ought to you have sustained? ought to they have sustained?	ought to I have been sustaining? ought to you have been sustaining? ought to he have been sustaining? ought to we have been sustaining? ought to you have been sustaining? ought to they have been sustaining?

Interro-negative form

Simple form	V-ing form
oughtn't I to sustain? oughtn't you to sustain? oughtn't he to sustain? oughtn't we to sustain? oughtn't you to sustain? oughtn't they to sustain?	oughtn't I to be sustaining? oughtn't you to be sustaining? oughtn't he to be sustaining? oughtn't we to be sustaining? oughtn't you to be sustaining? oughtn't they to be sustaining?
Perfect	V-ing perfect
oughtn't I to have sustained? oughtn't you to have sustained? oughtn't he to have sustained? oughtn't we to have sustained? oughtn't you to have sustained? oughtn't they to have sustained?	oughtn't I to have been sustaining? oughtn't you to have been sustaining? oughtn't he to have been sustaining? oughtn't we to have been sustaining? oughtn't you to have been sustaining? oughtn't they to have been sustaining?