Conjugación del verbo inglés
COULD SURFACE

Verbo regular: surface - surfaced - surfaced

Afirmación

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