I could nod you could nod she could nod we could nod you could nod they could nod
Forma con V-ing
I could be nodding you could be nodding she could be nodding we could be nodding you could be nodding they could be nodding
Perfecto
I could have nodded you could have nodded she could have nodded we could have nodded you could have nodded they could have nodded
Perfecto con V-ing
I could have been nodding you could have been nodding she could have been nodding we could have been nodding you could have been nodding they could have been nodding
Negación
Forma simple
I couldn't nod you couldn't nod she couldn't nod we couldn't nod you couldn't nod they couldn't nod
Forma con V-ing
I couldn't be nodding you couldn't be nodding she couldn't be nodding we couldn't be nodding you couldn't be nodding they couldn't be nodding
Perfecto
I couldn't have nodded you couldn't have nodded she couldn't have nodded we couldn't have nodded you couldn't have nodded they couldn't have nodded
Perfecto con V-ing
I couldn't have been nodding you couldn't have been nodding she 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 she nod? could we nod? could you nod? could they nod?
Forma con V-ing
could I be nodding? could you be nodding? could she be nodding? could we be nodding? could you be nodding? could they be nodding?
Perfecto
could I have nodded? could you have nodded? could she have nodded? could we have nodded? could you have nodded? could they have nodded?
Perfecto con V-ing
could I have been nodding? could you have been nodding? could she have been nodding? could we have been nodding? could you have been nodding? could they have been nodding?
Forma interro-negativa
Forma simple
couldn't I nod? couldn't you nod? couldn't she nod? couldn't we nod? couldn't you nod? couldn't they nod?
Forma con V-ing
couldn't I be nodding? couldn't you be nodding? couldn't she be nodding? couldn't we be nodding? couldn't you be nodding? couldn't they be nodding?
Perfecto
couldn't I have nodded? couldn't you have nodded? couldn't she have nodded? couldn't we have nodded? couldn't you have nodded? couldn't they have nodded?
Perfecto con V-ing
couldn't I have been nodding? couldn't you have been nodding? couldn't she have been nodding? couldn't we have been nodding? couldn't you have been nodding? couldn't they have been nodding?