I can sell you can sell she can sell we can sell you can sell they can sell
Forma con V-ing
I can be selling you can be selling she can be selling we can be selling you can be selling they can be selling
Perfecto
I can have sold you can have sold she can have sold we can have sold you can have sold they can have sold
Perfecto con V-ing
I can have been selling you can have been selling she can have been selling we can have been selling you can have been selling they can have been selling
Negación
Forma simple
I can't sell you can't sell she can't sell we can't sell you can't sell they can't sell
Forma con V-ing
I can't be selling you can't be selling she can't be selling we can't be selling you can't be selling they can't be selling
Perfecto
I can't have sold you can't have sold she can't have sold we can't have sold you can't have sold they can't have sold
Perfecto con V-ing
I can't have been selling you can't have been selling she can't have been selling we can't have been selling you can't have been selling they can't have been selling
Forma interrogativa
Forma simple
can I sell? can you sell? can she sell? can we sell? can you sell? can they sell?
Forma con V-ing
can I be selling? can you be selling? can she be selling? can we be selling? can you be selling? can they be selling?
Perfecto
can I have sold? can you have sold? can she have sold? can we have sold? can you have sold? can they have sold?
Perfecto con V-ing
can I have been selling? can you have been selling? can she have been selling? can we have been selling? can you have been selling? can they have been selling?
Forma interro-negativa
Forma simple
can't I sell? can't you sell? can't she sell? can't we sell? can't you sell? can't they sell?
Forma con V-ing
can't I be selling? can't you be selling? can't she be selling? can't we be selling? can't you be selling? can't they be selling?
Perfecto
can't I have sold? can't you have sold? can't she have sold? can't we have sold? can't you have sold? can't they have sold?
Perfecto con V-ing
can't I have been selling? can't you have been selling? can't she have been selling? can't we have been selling? can't you have been selling? can't they have been selling?