I can surface you can surface she can surface we can surface you can surface they can surface
Forma con V-ing
I can be surfacing you can be surfacing she can be surfacing we can be surfacing you can be surfacing they can be surfacing
Perfecto
I can have surfaced you can have surfaced she can have surfaced we can have surfaced you can have surfaced they can have surfaced
Perfecto con V-ing
I can have been surfacing you can have been surfacing she can have been surfacing we can have been surfacing you can have been surfacing they can have been surfacing
Negación
Forma simple
I cannot surface you cannot surface she cannot surface we cannot surface you cannot surface they cannot surface
Forma con V-ing
I cannot be surfacing you cannot be surfacing she cannot be surfacing we cannot be surfacing you cannot be surfacing they cannot be surfacing
Perfecto
I cannot have surfaced you cannot have surfaced she cannot have surfaced we cannot have surfaced you cannot have surfaced they cannot have surfaced
Perfecto con V-ing
I cannot have been surfacing you cannot have been surfacing she cannot have been surfacing we cannot have been surfacing you cannot have been surfacing they cannot have been surfacing
Forma interrogativa
Forma simple
can I surface? can you surface? can she surface? can we surface? can you surface? can they surface?
Forma con V-ing
can I be surfacing? can you be surfacing? can she be surfacing? can we be surfacing? can you be surfacing? can they be surfacing?
Perfecto
can I have surfaced? can you have surfaced? can she have surfaced? can we have surfaced? can you have surfaced? can they have surfaced?
Perfecto con V-ing
can I have been surfacing? can you have been surfacing? can she have been surfacing? can we have been surfacing? can you have been surfacing? can they have been surfacing?
Forma interro-negativa
Forma simple
can I not surface? can you not surface? can she not surface? can we not surface? can you not surface? can they not surface?
Forma con V-ing
can I not be surfacing? can you not be surfacing? can she not be surfacing? can we not be surfacing? can you not be surfacing? can they not be surfacing?
Perfecto
can I not have surfaced? can you not have surfaced? can she not have surfaced? can we not have surfaced? can you not have surfaced? can they not have surfaced?
Perfecto con V-ing
can I not have been surfacing? can you not have been surfacing? can she not have been surfacing? can we not have been surfacing? can you not have been surfacing? can they not have been surfacing?