I can forage you can forage she can forage we can forage you can forage they can forage
V-ing form
I can be foraging you can be foraging she can be foraging we can be foraging you can be foraging they can be foraging
Perfect
I can have foraged you can have foraged she 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 she can have been foraging we can have been foraging you can have been foraging they can have been foraging
Negation
Simple form
I cannot forage you cannot forage she cannot forage we cannot forage you cannot forage they cannot forage
V-ing form
I cannot be foraging you cannot be foraging she cannot be foraging we cannot be foraging you cannot be foraging they cannot be foraging
Perfect
I cannot have foraged you cannot have foraged she cannot have foraged we cannot have foraged you cannot have foraged they cannot have foraged
V-ing perfect
I cannot have been foraging you cannot have been foraging she cannot have been foraging we cannot have been foraging you cannot have been foraging they cannot have been foraging
Interrogative form
Simple form
can I forage? can you forage? can she forage? can we forage? can you forage? can they forage?
V-ing form
can I be foraging? can you be foraging? can she be foraging? can we be foraging? can you be foraging? can they be foraging?
Perfect
can I have foraged? can you have foraged? can she 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 she have been foraging? can we have been foraging? can you have been foraging? can they have been foraging?
Interro-negative form
Simple form
can I not forage? can you not forage? can she not forage? can we not forage? can you not forage? can they not forage?
V-ing form
can I not be foraging? can you not be foraging? can she not be foraging? can we not be foraging? can you not be foraging? can they not be foraging?
Perfect
can I not have foraged? can you not have foraged? can she not have foraged? can we not have foraged? can you not have foraged? can they not have foraged?
V-ing perfect
can I not have been foraging? can you not have been foraging? can she not have been foraging? can we not have been foraging? can you not have been foraging? can they not have been foraging?