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