I could sit you could sit he could sit we could sit you could sit they could sit
Forma com V-ing
I could be sitting you could be sitting he could be sitting we could be sitting you could be sitting they could be sitting
Perfeito
I could have sat you could have sat he could have sat we could have sat you could have sat they could have sat
Perfeito com V-ing
I could have been sitting you could have been sitting he could have been sitting we could have been sitting you could have been sitting they could have been sitting
Negação
Forma simple
I couldn't sit you couldn't sit he couldn't sit we couldn't sit you couldn't sit they couldn't sit
Forma com V-ing
I couldn't be sitting you couldn't be sitting he couldn't be sitting we couldn't be sitting you couldn't be sitting they couldn't be sitting
Perfeito
I couldn't have sat you couldn't have sat he couldn't have sat we couldn't have sat you couldn't have sat they couldn't have sat
Perfeito com V-ing
I couldn't have been sitting you couldn't have been sitting he couldn't have been sitting we couldn't have been sitting you couldn't have been sitting they couldn't have been sitting
Forma interrogativa
Forma simple
could I sit? could you sit? could he sit? could we sit? could you sit? could they sit?
Forma com V-ing
could I be sitting? could you be sitting? could he be sitting? could we be sitting? could you be sitting? could they be sitting?
Perfeito
could I have sat? could you have sat? could he have sat? could we have sat? could you have sat? could they have sat?
Perfeito com V-ing
could I have been sitting? could you have been sitting? could he have been sitting? could we have been sitting? could you have been sitting? could they have been sitting?
Forma interro-Negação
Forma simple
couldn't I sit? couldn't you sit? couldn't he sit? couldn't we sit? couldn't you sit? couldn't they sit?
Forma com V-ing
couldn't I be sitting? couldn't you be sitting? couldn't he be sitting? couldn't we be sitting? couldn't you be sitting? couldn't they be sitting?
Perfeito
couldn't I have sat? couldn't you have sat? couldn't he have sat? couldn't we have sat? couldn't you have sat? couldn't they have sat?
Perfeito com V-ing
couldn't I have been sitting? couldn't you have been sitting? couldn't he have been sitting? couldn't we have been sitting? couldn't you have been sitting? couldn't they have been sitting?