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 couldn't underline you couldn't underline she couldn't underline we couldn't underline you couldn't underline they couldn't underline
Forma con V-ing
I couldn't be underlining you couldn't be underlining she couldn't be underlining we couldn't be underlining you couldn't be underlining they couldn't be underlining
Perfecto
I couldn't have underlined you couldn't have underlined she couldn't have underlined we couldn't have underlined you couldn't have underlined they couldn't have underlined
Perfecto con V-ing
I couldn't have been underlining you couldn't have been underlining she couldn't have been underlining we couldn't have been underlining you couldn't have been underlining they couldn't 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
couldn't I underline? couldn't you underline? couldn't she underline? couldn't we underline? couldn't you underline? couldn't they underline?
Forma con V-ing
couldn't I be underlining? couldn't you be underlining? couldn't she be underlining? couldn't we be underlining? couldn't you be underlining? couldn't they be underlining?
Perfecto
couldn't I have underlined? couldn't you have underlined? couldn't she have underlined? couldn't we have underlined? couldn't you have underlined? couldn't they have underlined?
Perfecto con V-ing
couldn't I have been underlining? couldn't you have been underlining? couldn't she have been underlining? couldn't we have been underlining? couldn't you have been underlining? couldn't they have been underlining?