I can indulge you can indulge he can indulge we can indulge you can indulge they can indulge
V-ing form
I can be indulging you can be indulging he can be indulging we can be indulging you can be indulging they can be indulging
Perfect
I can have indulged you can have indulged he can have indulged we can have indulged you can have indulged they can have indulged
V-ing perfect
I can have been indulging you can have been indulging he can have been indulging we can have been indulging you can have been indulging they can have been indulging
Negation
Simple form
I can't indulge you can't indulge he can't indulge we can't indulge you can't indulge they can't indulge
V-ing form
I can't be indulging you can't be indulging he can't be indulging we can't be indulging you can't be indulging they can't be indulging
Perfect
I can't have indulged you can't have indulged he can't have indulged we can't have indulged you can't have indulged they can't have indulged
V-ing perfect
I can't have been indulging you can't have been indulging he can't have been indulging we can't have been indulging you can't have been indulging they can't have been indulging
Interrogative form
Simple form
can I indulge? can you indulge? can he indulge? can we indulge? can you indulge? can they indulge?
V-ing form
can I be indulging? can you be indulging? can he be indulging? can we be indulging? can you be indulging? can they be indulging?
Perfect
can I have indulged? can you have indulged? can he have indulged? can we have indulged? can you have indulged? can they have indulged?
V-ing perfect
can I have been indulging? can you have been indulging? can he have been indulging? can we have been indulging? can you have been indulging? can they have been indulging?
Interro-negative form
Simple form
can't I indulge? can't you indulge? can't he indulge? can't we indulge? can't you indulge? can't they indulge?
V-ing form
can't I be indulging? can't you be indulging? can't he be indulging? can't we be indulging? can't you be indulging? can't they be indulging?
Perfect
can't I have indulged? can't you have indulged? can't he have indulged? can't we have indulged? can't you have indulged? can't they have indulged?
V-ing perfect
can't I have been indulging? can't you have been indulging? can't he have been indulging? can't we have been indulging? can't you have been indulging? can't they have been indulging?