Verbo regular: underline - underlined - underlined
Afirmación
Forma simple
I could underline you could underline she could underline we could underline you could underline they could underline
Forma con V-ing
I could be underlining you could be underlining she could be underlining we could be underlining you could be underlining they could be underlining
Perfecto
I could have underlined you could have underlined she could have underlined we could have underlined you could have underlined they could have underlined
Perfecto con V-ing
I could have been underlining you could have been underlining she could have been underlining we could have been underlining you could have been underlining they could have been underlining
Negación
Forma simple
I could not underline you could not underline she could not underline we could not underline you could not underline they could not underline
Forma con V-ing
I could not be underlining you could not be underlining she could not be underlining we could not be underlining you could not be underlining they could not be underlining
Perfecto
I could not have underlined you could not have underlined she could not have underlined we could not have underlined you could not have underlined they could not have underlined
Perfecto con V-ing
I could not have been underlining you could not have been underlining she could not have been underlining we could not have been underlining you could not have been underlining they could not have been underlining
Forma interrogativa
Forma simple
could I underline? could you underline? could she underline? could we underline? could you underline? could they underline?
Forma con V-ing
could I be underlining? could you be underlining? could she be underlining? could we be underlining? could you be underlining? could they be underlining?
Perfecto
could I have underlined? could you have underlined? could she have underlined? could we have underlined? could you have underlined? could they have underlined?
Perfecto con V-ing
could I have been underlining? could you have been underlining? could she have been underlining? could we have been underlining? could you have been underlining? could they have been underlining?
Forma interro-negativa
Forma simple
could I not underline? could you not underline? could she not underline? could we not underline? could you not underline? could they not underline?
Forma con V-ing
could I not be underlining? could you not be underlining? could she not be underlining? could we not be underlining? could you not be underlining? could they not be underlining?
Perfecto
could I not have underlined? could you not have underlined? could she not have underlined? could we not have underlined? could you not have underlined? could they not have underlined?
Perfecto con V-ing
could I not have been underlining? could you not have been underlining? could she not have been underlining? could we not have been underlining? could you not have been underlining? could they not have been underlining?