I can forage you can forage he can forage we can forage you can forage they can forage
V-ing form
I can be foraging you can be foraging he can be foraging we can be foraging you can be foraging they can be foraging
Perfect
I can have foraged you can have foraged he can have foraged we can have foraged you can have foraged they can have foraged
V-ing perfect
I can have been foraging you can have been foraging he can have been foraging we can have been foraging you can have been foraging they can have been foraging
Negation
Simple form
I can't forage you can't forage he can't forage we can't forage you can't forage they can't forage
V-ing form
I can't be foraging you can't be foraging he can't be foraging we can't be foraging you can't be foraging they can't be foraging
Perfect
I can't have foraged you can't have foraged he can't have foraged we can't have foraged you can't have foraged they can't have foraged
V-ing perfect
I can't have been foraging you can't have been foraging he can't have been foraging we can't have been foraging you can't have been foraging they can't have been foraging
Interrogative form
Simple form
can I forage? can you forage? can he forage? can we forage? can you forage? can they forage?
V-ing form
can I be foraging? can you be foraging? can he be foraging? can we be foraging? can you be foraging? can they be foraging?
Perfect
can I have foraged? can you have foraged? can he have foraged? can we have foraged? can you have foraged? can they have foraged?
V-ing perfect
can I have been foraging? can you have been foraging? can he have been foraging? can we have been foraging? can you have been foraging? can they have been foraging?
Interro-negative form
Simple form
can't I forage? can't you forage? can't he forage? can't we forage? can't you forage? can't they forage?
V-ing form
can't I be foraging? can't you be foraging? can't he be foraging? can't we be foraging? can't you be foraging? can't they be foraging?
Perfect
can't I have foraged? can't you have foraged? can't he have foraged? can't we have foraged? can't you have foraged? can't they have foraged?
V-ing perfect
can't I have been foraging? can't you have been foraging? can't he have been foraging? can't we have been foraging? can't you have been foraging? can't they have been foraging?