I can swim you can swim she can swim we can swim you can swim they can swim
Forma con V-ing
I can be swimming you can be swimming she can be swimming we can be swimming you can be swimming they can be swimming
Perfecto
I can have swum you can have swum she can have swum we can have swum you can have swum they can have swum
Perfecto con V-ing
I can have been swimming you can have been swimming she can have been swimming we can have been swimming you can have been swimming they can have been swimming
Negación
Forma simple
I can't swim you can't swim she can't swim we can't swim you can't swim they can't swim
Forma con V-ing
I can't be swimming you can't be swimming she can't be swimming we can't be swimming you can't be swimming they can't be swimming
Perfecto
I can't have swum you can't have swum she can't have swum we can't have swum you can't have swum they can't have swum
Perfecto con V-ing
I can't have been swimming you can't have been swimming she can't have been swimming we can't have been swimming you can't have been swimming they can't have been swimming
Forma interrogativa
Forma simple
can I swim? can you swim? can she swim? can we swim? can you swim? can they swim?
Forma con V-ing
can I be swimming? can you be swimming? can she be swimming? can we be swimming? can you be swimming? can they be swimming?
Perfecto
can I have swum? can you have swum? can she have swum? can we have swum? can you have swum? can they have swum?
Perfecto con V-ing
can I have been swimming? can you have been swimming? can she have been swimming? can we have been swimming? can you have been swimming? can they have been swimming?
Forma interro-negativa
Forma simple
can't I swim? can't you swim? can't she swim? can't we swim? can't you swim? can't they swim?
Forma con V-ing
can't I be swimming? can't you be swimming? can't she be swimming? can't we be swimming? can't you be swimming? can't they be swimming?
Perfecto
can't I have swum? can't you have swum? can't she have swum? can't we have swum? can't you have swum? can't they have swum?
Perfecto con V-ing
can't I have been swimming? can't you have been swimming? can't she have been swimming? can't we have been swimming? can't you have been swimming? can't they have been swimming?