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 couldn't surface you couldn't surface he couldn't surface we couldn't surface you couldn't surface they couldn't surface	I couldn't be surfacing you couldn't be surfacing he couldn't be surfacing we couldn't be surfacing you couldn't be surfacing they couldn't be surfacing
Perfecto	Perfecto con V-ing
I couldn't have surfaced you couldn't have surfaced he couldn't have surfaced we couldn't have surfaced you couldn't have surfaced they couldn't have surfaced	I couldn't have been surfacing you couldn't have been surfacing he couldn't have been surfacing we couldn't have been surfacing you couldn't have been surfacing they couldn't 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
couldn't I surface? couldn't you surface? couldn't he surface? couldn't we surface? couldn't you surface? couldn't they surface?	couldn't I be surfacing? couldn't you be surfacing? couldn't he be surfacing? couldn't we be surfacing? couldn't you be surfacing? couldn't they be surfacing?
Perfecto	Perfecto con V-ing
couldn't I have surfaced? couldn't you have surfaced? couldn't he have surfaced? couldn't we have surfaced? couldn't you have surfaced? couldn't they have surfaced?	couldn't I have been surfacing? couldn't you have been surfacing? couldn't he have been surfacing? couldn't we have been surfacing? couldn't you have been surfacing? couldn't they have been surfacing?