English verb conjugation
OUGHT TO IMPAIR

Regular verb: impair - impaired - impaired

Affirmation

Simple form	V-ing form
I ought to impair you ought to impair he ought to impair we ought to impair you ought to impair they ought to impair	I ought to be impairing you ought to be impairing he ought to be impairing we ought to be impairing you ought to be impairing they ought to be impairing
Perfect	V-ing perfect
I ought to have impaired you ought to have impaired he ought to have impaired we ought to have impaired you ought to have impaired they ought to have impaired	I ought to have been impairing you ought to have been impairing he ought to have been impairing we ought to have been impairing you ought to have been impairing they ought to have been impairing

Negation

Simple form	V-ing form
I oughtn't to impair you oughtn't to impair he oughtn't to impair we oughtn't to impair you oughtn't to impair they oughtn't to impair	I oughtn't to be impairing you oughtn't to be impairing he oughtn't to be impairing we oughtn't to be impairing you oughtn't to be impairing they oughtn't to be impairing
Perfect	V-ing perfect
I oughtn't to have impaired you oughtn't to have impaired he oughtn't to have impaired we oughtn't to have impaired you oughtn't to have impaired they oughtn't to have impaired	I oughtn't to have been impairing you oughtn't to have been impairing he oughtn't to have been impairing we oughtn't to have been impairing you oughtn't to have been impairing they oughtn't to have been impairing

Interrogative form

Simple form	V-ing form
ought to I impair? ought to you impair? ought to he impair? ought to we impair? ought to you impair? ought to they impair?	ought to I be impairing? ought to you be impairing? ought to he be impairing? ought to we be impairing? ought to you be impairing? ought to they be impairing?
Perfect	V-ing perfect
ought to I have impaired? ought to you have impaired? ought to he have impaired? ought to we have impaired? ought to you have impaired? ought to they have impaired?	ought to I have been impairing? ought to you have been impairing? ought to he have been impairing? ought to we have been impairing? ought to you have been impairing? ought to they have been impairing?

Interro-negative form

Simple form	V-ing form
oughtn't I to impair? oughtn't you to impair? oughtn't he to impair? oughtn't we to impair? oughtn't you to impair? oughtn't they to impair?	oughtn't I to be impairing? oughtn't you to be impairing? oughtn't he to be impairing? oughtn't we to be impairing? oughtn't you to be impairing? oughtn't they to be impairing?
Perfect	V-ing perfect
oughtn't I to have impaired? oughtn't you to have impaired? oughtn't he to have impaired? oughtn't we to have impaired? oughtn't you to have impaired? oughtn't they to have impaired?	oughtn't I to have been impairing? oughtn't you to have been impairing? oughtn't he to have been impairing? oughtn't we to have been impairing? oughtn't you to have been impairing? oughtn't they to have been impairing?