Conjugación del verbo inglés
COULD SURFACE

Verbo regular: surface - surfaced - surfaced

Afirmación

Forma simple	Forma con V-ing
I could surface you could surface he could surface we could surface you could surface they could surface	I could be surfacing you could be surfacing he could be surfacing we could be surfacing you could be surfacing they could be surfacing
Perfecto	Perfecto con V-ing
I could have surfaced you could have surfaced he could have surfaced we could have surfaced you could have surfaced they could have surfaced	I could have been surfacing you could have been surfacing he could have been surfacing we could have been surfacing you could have been surfacing they could have been surfacing

Negación

Forma simple	Forma con V-ing
I could not surface you could not surface he could not surface we could not surface you could not surface they could not surface	I could not be surfacing you could not be surfacing he could not be surfacing we could not be surfacing you could not be surfacing they could not be surfacing
Perfecto	Perfecto con V-ing
I could not have surfaced you could not have surfaced he could not have surfaced we could not have surfaced you could not have surfaced they could not have surfaced	I could not have been surfacing you could not have been surfacing he could not have been surfacing we could not have been surfacing you could not have been surfacing they could not have been surfacing

Forma interrogativa

Forma simple	Forma con V-ing
could I surface? could you surface? could he surface? could we surface? could you surface? could they surface?	could I be surfacing? could you be surfacing? could he be surfacing? could we be surfacing? could you be surfacing? could they be surfacing?
Perfecto	Perfecto con V-ing
could I have surfaced? could you have surfaced? could he have surfaced? could we have surfaced? could you have surfaced? could they have surfaced?	could I have been surfacing? could you have been surfacing? could he have been surfacing? could we have been surfacing? could you have been surfacing? could they have been surfacing?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not surface? could you not surface? could he not surface? could we not surface? could you not surface? could they not surface?	could I not be surfacing? could you not be surfacing? could he not be surfacing? could we not be surfacing? could you not be surfacing? could they not be surfacing?
Perfecto	Perfecto con V-ing
could I not have surfaced? could you not have surfaced? could he not have surfaced? could we not have surfaced? could you not have surfaced? could they not have surfaced?	could I not have been surfacing? could you not have been surfacing? could he not have been surfacing? could we not have been surfacing? could you not have been surfacing? could they not have been surfacing?