I can desert you can desert she can desert we can desert you can desert they can desert
V-ing form
I can be deserting you can be deserting she can be deserting we can be deserting you can be deserting they can be deserting
Perfect
I can have deserted you can have deserted she can have deserted we can have deserted you can have deserted they can have deserted
V-ing perfect
I can have been deserting you can have been deserting she can have been deserting we can have been deserting you can have been deserting they can have been deserting
Negation
Simple form
I cannot desert you cannot desert she cannot desert we cannot desert you cannot desert they cannot desert
V-ing form
I cannot be deserting you cannot be deserting she cannot be deserting we cannot be deserting you cannot be deserting they cannot be deserting
Perfect
I cannot have deserted you cannot have deserted she cannot have deserted we cannot have deserted you cannot have deserted they cannot have deserted
V-ing perfect
I cannot have been deserting you cannot have been deserting she cannot have been deserting we cannot have been deserting you cannot have been deserting they cannot have been deserting
Interrogative form
Simple form
can I desert? can you desert? can she desert? can we desert? can you desert? can they desert?
V-ing form
can I be deserting? can you be deserting? can she be deserting? can we be deserting? can you be deserting? can they be deserting?
Perfect
can I have deserted? can you have deserted? can she have deserted? can we have deserted? can you have deserted? can they have deserted?
V-ing perfect
can I have been deserting? can you have been deserting? can she have been deserting? can we have been deserting? can you have been deserting? can they have been deserting?
Interro-negative form
Simple form
can I not desert? can you not desert? can she not desert? can we not desert? can you not desert? can they not desert?
V-ing form
can I not be deserting? can you not be deserting? can she not be deserting? can we not be deserting? can you not be deserting? can they not be deserting?
Perfect
can I not have deserted? can you not have deserted? can she not have deserted? can we not have deserted? can you not have deserted? can they not have deserted?
V-ing perfect
can I not have been deserting? can you not have been deserting? can she not have been deserting? can we not have been deserting? can you not have been deserting? can they not have been deserting?