Conjugación del verbo inglés COULD SUM
Verbo regular: sum - summed - summed
Afirmación
Forma simple
I could sumyou could sum
he could sum
we could sum
you could sum
they could sum
Forma con V-ing
I could be summingyou could be summing
he could be summing
we could be summing
you could be summing
they could be summing
Perfecto
I could have summedyou could have summed
he could have summed
we could have summed
you could have summed
they could have summed
Perfecto con V-ing
I could have been summingyou could have been summing
he could have been summing
we could have been summing
you could have been summing
they could have been summing
Negación
Forma simple
I couldn't sumyou couldn't sum
he couldn't sum
we couldn't sum
you couldn't sum
they couldn't sum
Forma con V-ing
I couldn't be summingyou couldn't be summing
he couldn't be summing
we couldn't be summing
you couldn't be summing
they couldn't be summing
Perfecto
I couldn't have summedyou couldn't have summed
he couldn't have summed
we couldn't have summed
you couldn't have summed
they couldn't have summed
Perfecto con V-ing
I couldn't have been summingyou couldn't have been summing
he couldn't have been summing
we couldn't have been summing
you couldn't have been summing
they couldn't have been summing
Forma interrogativa
Forma simple
could I sum?could you sum?
could he sum?
could we sum?
could you sum?
could they sum?
Forma con V-ing
could I be summing?could you be summing?
could he be summing?
could we be summing?
could you be summing?
could they be summing?
Perfecto
could I have summed?could you have summed?
could he have summed?
could we have summed?
could you have summed?
could they have summed?
Perfecto con V-ing
could I have been summing?could you have been summing?
could he have been summing?
could we have been summing?
could you have been summing?
could they have been summing?
Forma interro-negativa
Forma simple
couldn't I sum?couldn't you sum?
couldn't he sum?
couldn't we sum?
couldn't you sum?
couldn't they sum?
Forma con V-ing
couldn't I be summing?couldn't you be summing?
couldn't he be summing?
couldn't we be summing?
couldn't you be summing?
couldn't they be summing?
Perfecto
couldn't I have summed?couldn't you have summed?
couldn't he have summed?
couldn't we have summed?
couldn't you have summed?
couldn't they have summed?
Perfecto con V-ing
couldn't I have been summing?couldn't you have been summing?
couldn't he have been summing?
couldn't we have been summing?
couldn't you have been summing?
couldn't they have been summing?