I can advertise you can advertise she can advertise we can advertise you can advertise they can advertise
V-ing form
I can be advertising you can be advertising she can be advertising we can be advertising you can be advertising they can be advertising
Perfect
I can have advertised you can have advertised she can have advertised we can have advertised you can have advertised they can have advertised
V-ing perfect
I can have been advertising you can have been advertising she can have been advertising we can have been advertising you can have been advertising they can have been advertising
Negation
Simple form
I can't advertise you can't advertise she can't advertise we can't advertise you can't advertise they can't advertise
V-ing form
I can't be advertising you can't be advertising she can't be advertising we can't be advertising you can't be advertising they can't be advertising
Perfect
I can't have advertised you can't have advertised she can't have advertised we can't have advertised you can't have advertised they can't have advertised
V-ing perfect
I can't have been advertising you can't have been advertising she can't have been advertising we can't have been advertising you can't have been advertising they can't have been advertising
Interrogative form
Simple form
can I advertise? can you advertise? can she advertise? can we advertise? can you advertise? can they advertise?
V-ing form
can I be advertising? can you be advertising? can she be advertising? can we be advertising? can you be advertising? can they be advertising?
Perfect
can I have advertised? can you have advertised? can she have advertised? can we have advertised? can you have advertised? can they have advertised?
V-ing perfect
can I have been advertising? can you have been advertising? can she have been advertising? can we have been advertising? can you have been advertising? can they have been advertising?
Interro-negative form
Simple form
can't I advertise? can't you advertise? can't she advertise? can't we advertise? can't you advertise? can't they advertise?
V-ing form
can't I be advertising? can't you be advertising? can't she be advertising? can't we be advertising? can't you be advertising? can't they be advertising?
Perfect
can't I have advertised? can't you have advertised? can't she have advertised? can't we have advertised? can't you have advertised? can't they have advertised?
V-ing perfect
can't I have been advertising? can't you have been advertising? can't she have been advertising? can't we have been advertising? can't you have been advertising? can't they have been advertising?