I could hiss you could hiss he could hiss we could hiss you could hiss they could hiss
Forma con V-ing
I could be hissing you could be hissing he could be hissing we could be hissing you could be hissing they could be hissing
Perfecto
I could have hissed you could have hissed he could have hissed we could have hissed you could have hissed they could have hissed
Perfecto con V-ing
I could have been hissing you could have been hissing he could have been hissing we could have been hissing you could have been hissing they could have been hissing
Negación
Forma simple
I couldn't hiss you couldn't hiss he couldn't hiss we couldn't hiss you couldn't hiss they couldn't hiss
Forma con V-ing
I couldn't be hissing you couldn't be hissing he couldn't be hissing we couldn't be hissing you couldn't be hissing they couldn't be hissing
Perfecto
I couldn't have hissed you couldn't have hissed he couldn't have hissed we couldn't have hissed you couldn't have hissed they couldn't have hissed
Perfecto con V-ing
I couldn't have been hissing you couldn't have been hissing he couldn't have been hissing we couldn't have been hissing you couldn't have been hissing they couldn't have been hissing
Forma interrogativa
Forma simple
could I hiss? could you hiss? could he hiss? could we hiss? could you hiss? could they hiss?
Forma con V-ing
could I be hissing? could you be hissing? could he be hissing? could we be hissing? could you be hissing? could they be hissing?
Perfecto
could I have hissed? could you have hissed? could he have hissed? could we have hissed? could you have hissed? could they have hissed?
Perfecto con V-ing
could I have been hissing? could you have been hissing? could he have been hissing? could we have been hissing? could you have been hissing? could they have been hissing?
Forma interro-negativa
Forma simple
couldn't I hiss? couldn't you hiss? couldn't he hiss? couldn't we hiss? couldn't you hiss? couldn't they hiss?
Forma con V-ing
couldn't I be hissing? couldn't you be hissing? couldn't he be hissing? couldn't we be hissing? couldn't you be hissing? couldn't they be hissing?
Perfecto
couldn't I have hissed? couldn't you have hissed? couldn't he have hissed? couldn't we have hissed? couldn't you have hissed? couldn't they have hissed?
Perfecto con V-ing
couldn't I have been hissing? couldn't you have been hissing? couldn't he have been hissing? couldn't we have been hissing? couldn't you have been hissing? couldn't they have been hissing?