I ought to treat you ought to treat he ought to treat we ought to treat you ought to treat they ought to treat
V-ing form
I ought to be treating you ought to be treating he ought to be treating we ought to be treating you ought to be treating they ought to be treating
Perfect
I ought to have treated you ought to have treated he ought to have treated we ought to have treated you ought to have treated they ought to have treated
V-ing perfect
I ought to have been treating you ought to have been treating he ought to have been treating we ought to have been treating you ought to have been treating they ought to have been treating
Negation
Simple form
I oughtn't to treat you oughtn't to treat he oughtn't to treat we oughtn't to treat you oughtn't to treat they oughtn't to treat
V-ing form
I oughtn't to be treating you oughtn't to be treating he oughtn't to be treating we oughtn't to be treating you oughtn't to be treating they oughtn't to be treating
Perfect
I oughtn't to have treated you oughtn't to have treated he oughtn't to have treated we oughtn't to have treated you oughtn't to have treated they oughtn't to have treated
V-ing perfect
I oughtn't to have been treating you oughtn't to have been treating he oughtn't to have been treating we oughtn't to have been treating you oughtn't to have been treating they oughtn't to have been treating
Interrogative form
Simple form
ought to I treat? ought to you treat? ought to he treat? ought to we treat? ought to you treat? ought to they treat?
V-ing form
ought to I be treating? ought to you be treating? ought to he be treating? ought to we be treating? ought to you be treating? ought to they be treating?
Perfect
ought to I have treated? ought to you have treated? ought to he have treated? ought to we have treated? ought to you have treated? ought to they have treated?
V-ing perfect
ought to I have been treating? ought to you have been treating? ought to he have been treating? ought to we have been treating? ought to you have been treating? ought to they have been treating?
Interro-negative form
Simple form
oughtn't I to treat? oughtn't you to treat? oughtn't he to treat? oughtn't we to treat? oughtn't you to treat? oughtn't they to treat?
V-ing form
oughtn't I to be treating? oughtn't you to be treating? oughtn't he to be treating? oughtn't we to be treating? oughtn't you to be treating? oughtn't they to be treating?
Perfect
oughtn't I to have treated? oughtn't you to have treated? oughtn't he to have treated? oughtn't we to have treated? oughtn't you to have treated? oughtn't they to have treated?
V-ing perfect
oughtn't I to have been treating? oughtn't you to have been treating? oughtn't he to have been treating? oughtn't we to have been treating? oughtn't you to have been treating? oughtn't they to have been treating?