I ought to dust you ought to dust she ought to dust we ought to dust you ought to dust they ought to dust
V-ing form
I ought to be dusting you ought to be dusting she ought to be dusting we ought to be dusting you ought to be dusting they ought to be dusting
Perfect
I ought to have dusted you ought to have dusted she ought to have dusted we ought to have dusted you ought to have dusted they ought to have dusted
V-ing perfect
I ought to have been dusting you ought to have been dusting she ought to have been dusting we ought to have been dusting you ought to have been dusting they ought to have been dusting
Negation
Simple form
I oughtn't to dust you oughtn't to dust she oughtn't to dust we oughtn't to dust you oughtn't to dust they oughtn't to dust
V-ing form
I oughtn't to be dusting you oughtn't to be dusting she oughtn't to be dusting we oughtn't to be dusting you oughtn't to be dusting they oughtn't to be dusting
Perfect
I oughtn't to have dusted you oughtn't to have dusted she oughtn't to have dusted we oughtn't to have dusted you oughtn't to have dusted they oughtn't to have dusted
V-ing perfect
I oughtn't to have been dusting you oughtn't to have been dusting she oughtn't to have been dusting we oughtn't to have been dusting you oughtn't to have been dusting they oughtn't to have been dusting
Interrogative form
Simple form
ought to I dust? ought to you dust? ought to she dust? ought to we dust? ought to you dust? ought to they dust?
V-ing form
ought to I be dusting? ought to you be dusting? ought to she be dusting? ought to we be dusting? ought to you be dusting? ought to they be dusting?
Perfect
ought to I have dusted? ought to you have dusted? ought to she have dusted? ought to we have dusted? ought to you have dusted? ought to they have dusted?
V-ing perfect
ought to I have been dusting? ought to you have been dusting? ought to she have been dusting? ought to we have been dusting? ought to you have been dusting? ought to they have been dusting?
Interro-negative form
Simple form
oughtn't I to dust? oughtn't you to dust? oughtn't she to dust? oughtn't we to dust? oughtn't you to dust? oughtn't they to dust?
V-ing form
oughtn't I to be dusting? oughtn't you to be dusting? oughtn't she to be dusting? oughtn't we to be dusting? oughtn't you to be dusting? oughtn't they to be dusting?
Perfect
oughtn't I to have dusted? oughtn't you to have dusted? oughtn't she to have dusted? oughtn't we to have dusted? oughtn't you to have dusted? oughtn't they to have dusted?
V-ing perfect
oughtn't I to have been dusting? oughtn't you to have been dusting? oughtn't she to have been dusting? oughtn't we to have been dusting? oughtn't you to have been dusting? oughtn't they to have been dusting?