I can brown you can brown she can brown we can brown you can brown they can brown
V-ing form
I can be browning you can be browning she can be browning we can be browning you can be browning they can be browning
Perfect
I can have browned you can have browned she can have browned we can have browned you can have browned they can have browned
V-ing perfect
I can have been browning you can have been browning she can have been browning we can have been browning you can have been browning they can have been browning
Negation
Simple form
I cannot brown you cannot brown she cannot brown we cannot brown you cannot brown they cannot brown
V-ing form
I cannot be browning you cannot be browning she cannot be browning we cannot be browning you cannot be browning they cannot be browning
Perfect
I cannot have browned you cannot have browned she cannot have browned we cannot have browned you cannot have browned they cannot have browned
V-ing perfect
I cannot have been browning you cannot have been browning she cannot have been browning we cannot have been browning you cannot have been browning they cannot have been browning
Interrogative form
Simple form
can I brown? can you brown? can she brown? can we brown? can you brown? can they brown?
V-ing form
can I be browning? can you be browning? can she be browning? can we be browning? can you be browning? can they be browning?
Perfect
can I have browned? can you have browned? can she have browned? can we have browned? can you have browned? can they have browned?
V-ing perfect
can I have been browning? can you have been browning? can she have been browning? can we have been browning? can you have been browning? can they have been browning?
Interro-negative form
Simple form
can I not brown? can you not brown? can she not brown? can we not brown? can you not brown? can they not brown?
V-ing form
can I not be browning? can you not be browning? can she not be browning? can we not be browning? can you not be browning? can they not be browning?
Perfect
can I not have browned? can you not have browned? can she not have browned? can we not have browned? can you not have browned? can they not have browned?
V-ing perfect
can I not have been browning? can you not have been browning? can she not have been browning? can we not have been browning? can you not have been browning? can they not have been browning?