I can backlog you can backlog he can backlog we can backlog you can backlog they can backlog
V-ing form
I can be backloging you can be backloging he can be backloging we can be backloging you can be backloging they can be backloging
Perfect
I can have backloged you can have backloged he can have backloged we can have backloged you can have backloged they can have backloged
V-ing perfect
I can have been backloging you can have been backloging he can have been backloging we can have been backloging you can have been backloging they can have been backloging
Negation
Simple form
I cannot backlog you cannot backlog he cannot backlog we cannot backlog you cannot backlog they cannot backlog
V-ing form
I cannot be backloging you cannot be backloging he cannot be backloging we cannot be backloging you cannot be backloging they cannot be backloging
Perfect
I cannot have backloged you cannot have backloged he cannot have backloged we cannot have backloged you cannot have backloged they cannot have backloged
V-ing perfect
I cannot have been backloging you cannot have been backloging he cannot have been backloging we cannot have been backloging you cannot have been backloging they cannot have been backloging
Interrogative form
Simple form
can I backlog? can you backlog? can he backlog? can we backlog? can you backlog? can they backlog?
V-ing form
can I be backloging? can you be backloging? can he be backloging? can we be backloging? can you be backloging? can they be backloging?
Perfect
can I have backloged? can you have backloged? can he have backloged? can we have backloged? can you have backloged? can they have backloged?
V-ing perfect
can I have been backloging? can you have been backloging? can he have been backloging? can we have been backloging? can you have been backloging? can they have been backloging?
Interro-negative form
Simple form
can I not backlog? can you not backlog? can he not backlog? can we not backlog? can you not backlog? can they not backlog?
V-ing form
can I not be backloging? can you not be backloging? can he not be backloging? can we not be backloging? can you not be backloging? can they not be backloging?
Perfect
can I not have backloged? can you not have backloged? can he not have backloged? can we not have backloged? can you not have backloged? can they not have backloged?
V-ing perfect
can I not have been backloging? can you not have been backloging? can he not have been backloging? can we not have been backloging? can you not have been backloging? can they not have been backloging?