I should dust you should dust he should dust we should dust you should dust they should dust
V-ing form
I should be dusting you should be dusting he should be dusting we should be dusting you should be dusting they should be dusting
Perfect
I should have dusted you should have dusted he should have dusted we should have dusted you should have dusted they should have dusted
V-ing perfect
I should have been dusting you should have been dusting he should have been dusting we should have been dusting you should have been dusting they should have been dusting
Negation
Simple form
I should not dust you should not dust he should not dust we should not dust you should not dust they should not dust
V-ing form
I should not be dusting you should not be dusting he should not be dusting we should not be dusting you should not be dusting they should not be dusting
Perfect
I should not have dusted you should not have dusted he should not have dusted we should not have dusted you should not have dusted they should not have dusted
V-ing perfect
I should not have been dusting you should not have been dusting he should not have been dusting we should not have been dusting you should not have been dusting they should not have been dusting
Interrogative form
Simple form
should I dust? should you dust? should he dust? should we dust? should you dust? should they dust?
V-ing form
should I be dusting? should you be dusting? should he be dusting? should we be dusting? should you be dusting? should they be dusting?
Perfect
should I have dusted? should you have dusted? should he have dusted? should we have dusted? should you have dusted? should they have dusted?
V-ing perfect
should I have been dusting? should you have been dusting? should he have been dusting? should we have been dusting? should you have been dusting? should they have been dusting?
Interro-negative form
Simple form
should I not dust? should you not dust? should he not dust? should we not dust? should you not dust? should they not dust?
V-ing form
should I not be dusting? should you not be dusting? should he not be dusting? should we not be dusting? should you not be dusting? should they not be dusting?
Perfect
should I not have dusted? should you not have dusted? should he not have dusted? should we not have dusted? should you not have dusted? should they not have dusted?
V-ing perfect
should I not have been dusting? should you not have been dusting? should he not have been dusting? should we not have been dusting? should you not have been dusting? should they not have been dusting?