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