I can dust you can dust he can dust we can dust you can dust they can dust
V-ing form
I can be dusting you can be dusting he can be dusting we can be dusting you can be dusting they can be dusting
Perfect
I can have dusted you can have dusted he 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 he 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 he 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 he 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 he 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 he 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 he dust? can we dust? can you dust? can they dust?
V-ing form
can I be dusting? can you be dusting? can he be dusting? can we be dusting? can you be dusting? can they be dusting?
Perfect
can I have dusted? can you have dusted? can he 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 he 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 he 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 he 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 he 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 he have been dusting? can't we have been dusting? can't you have been dusting? can't they have been dusting?