Conjugação do verbo inglês COULD SUM

Verbo regular: sum - summed - summed

Afirmação

Forma simple

I could sum
you could sum
he could sum
we could sum
you could sum
they could sum

Forma com V-ing

I could be summing
you could be summing
he could be summing
we could be summing
you could be summing
they could be summing

Perfeito

I could have summed
you could have summed
he could have summed
we could have summed
you could have summed
they could have summed

Perfeito com V-ing

I could have been summing
you could have been summing
he could have been summing
we could have been summing
you could have been summing
they could have been summing

Negação

Forma simple

I couldn't sum
you couldn't sum
he couldn't sum
we couldn't sum
you couldn't sum
they couldn't sum

Forma com V-ing

I couldn't be summing
you couldn't be summing
he couldn't be summing
we couldn't be summing
you couldn't be summing
they couldn't be summing

Perfeito

I couldn't have summed
you couldn't have summed
he couldn't have summed
we couldn't have summed
you couldn't have summed
they couldn't have summed

Perfeito com V-ing

I couldn't have been summing
you 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 com 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?

Perfeito

could I have summed?
could you have summed?
could he have summed?
could we have summed?
could you have summed?
could they have summed?

Perfeito com 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-Negação

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 com 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?

Perfeito

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?

Perfeito com 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?

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