I could nod you could nod he could nod we could nod you could nod they could nod
Forma com V-ing
I could be nodding you could be nodding he could be nodding we could be nodding you could be nodding they could be nodding
Perfeito
I could have nodded you could have nodded he could have nodded we could have nodded you could have nodded they could have nodded
Perfeito com V-ing
I could have been nodding you could have been nodding he could have been nodding we could have been nodding you could have been nodding they could have been nodding
Negação
Forma simple
I couldn't nod you couldn't nod he couldn't nod we couldn't nod you couldn't nod they couldn't nod
Forma com V-ing
I couldn't be nodding you couldn't be nodding he couldn't be nodding we couldn't be nodding you couldn't be nodding they couldn't be nodding
Perfeito
I couldn't have nodded you couldn't have nodded he couldn't have nodded we couldn't have nodded you couldn't have nodded they couldn't have nodded
Perfeito com V-ing
I couldn't have been nodding you couldn't have been nodding he couldn't have been nodding we couldn't have been nodding you couldn't have been nodding they couldn't have been nodding
Forma interrogativa
Forma simple
could I nod? could you nod? could he nod? could we nod? could you nod? could they nod?
Forma com V-ing
could I be nodding? could you be nodding? could he be nodding? could we be nodding? could you be nodding? could they be nodding?
Perfeito
could I have nodded? could you have nodded? could he have nodded? could we have nodded? could you have nodded? could they have nodded?
Perfeito com V-ing
could I have been nodding? could you have been nodding? could he have been nodding? could we have been nodding? could you have been nodding? could they have been nodding?
Forma interro-Negação
Forma simple
couldn't I nod? couldn't you nod? couldn't he nod? couldn't we nod? couldn't you nod? couldn't they nod?
Forma com V-ing
couldn't I be nodding? couldn't you be nodding? couldn't he be nodding? couldn't we be nodding? couldn't you be nodding? couldn't they be nodding?
Perfeito
couldn't I have nodded? couldn't you have nodded? couldn't he have nodded? couldn't we have nodded? couldn't you have nodded? couldn't they have nodded?
Perfeito com V-ing
couldn't I have been nodding? couldn't you have been nodding? couldn't he have been nodding? couldn't we have been nodding? couldn't you have been nodding? couldn't they have been nodding?