I can purge you can purge he can purge we can purge you can purge they can purge
V-ing form
I can be purging you can be purging he can be purging we can be purging you can be purging they can be purging
Perfect
I can have purged you can have purged he can have purged we can have purged you can have purged they can have purged
V-ing perfect
I can have been purging you can have been purging he can have been purging we can have been purging you can have been purging they can have been purging
Negation
Simple form
I can't purge you can't purge he can't purge we can't purge you can't purge they can't purge
V-ing form
I can't be purging you can't be purging he can't be purging we can't be purging you can't be purging they can't be purging
Perfect
I can't have purged you can't have purged he can't have purged we can't have purged you can't have purged they can't have purged
V-ing perfect
I can't have been purging you can't have been purging he can't have been purging we can't have been purging you can't have been purging they can't have been purging
Interrogative form
Simple form
can I purge? can you purge? can he purge? can we purge? can you purge? can they purge?
V-ing form
can I be purging? can you be purging? can he be purging? can we be purging? can you be purging? can they be purging?
Perfect
can I have purged? can you have purged? can he have purged? can we have purged? can you have purged? can they have purged?
V-ing perfect
can I have been purging? can you have been purging? can he have been purging? can we have been purging? can you have been purging? can they have been purging?
Interro-negative form
Simple form
can't I purge? can't you purge? can't he purge? can't we purge? can't you purge? can't they purge?
V-ing form
can't I be purging? can't you be purging? can't he be purging? can't we be purging? can't you be purging? can't they be purging?
Perfect
can't I have purged? can't you have purged? can't he have purged? can't we have purged? can't you have purged? can't they have purged?
V-ing perfect
can't I have been purging? can't you have been purging? can't he have been purging? can't we have been purging? can't you have been purging? can't they have been purging?