Conjugação do verbo inglês COULD STIFFEN

Verbo regular: stiffen - stiffened - stiffened

Afirmação

Forma simple

I could stiffen
you could stiffen
she could stiffen
we could stiffen
you could stiffen
they could stiffen

Forma com V-ing

I could be stiffening
you could be stiffening
she could be stiffening
we could be stiffening
you could be stiffening
they could be stiffening

Perfeito

I could have stiffened
you could have stiffened
she could have stiffened
we could have stiffened
you could have stiffened
they could have stiffened

Perfeito com V-ing

I could have been stiffening
you could have been stiffening
she could have been stiffening
we could have been stiffening
you could have been stiffening
they could have been stiffening

Negação

Forma simple

I could not stiffen
you could not stiffen
she could not stiffen
we could not stiffen
you could not stiffen
they could not stiffen

Forma com V-ing

I could not be stiffening
you could not be stiffening
she could not be stiffening
we could not be stiffening
you could not be stiffening
they could not be stiffening

Perfeito

I could not have stiffened
you could not have stiffened
she could not have stiffened
we could not have stiffened
you could not have stiffened
they could not have stiffened

Perfeito com V-ing

I could not have been stiffening
you could not have been stiffening
she could not have been stiffening
we could not have been stiffening
you could not have been stiffening
they could not have been stiffening

Forma interrogativa

Forma simple

could I stiffen?
could you stiffen?
could she stiffen?
could we stiffen?
could you stiffen?
could they stiffen?

Forma com V-ing

could I be stiffening?
could you be stiffening?
could she be stiffening?
could we be stiffening?
could you be stiffening?
could they be stiffening?

Perfeito

could I have stiffened?
could you have stiffened?
could she have stiffened?
could we have stiffened?
could you have stiffened?
could they have stiffened?

Perfeito com V-ing

could I have been stiffening?
could you have been stiffening?
could she have been stiffening?
could we have been stiffening?
could you have been stiffening?
could they have been stiffening?

Forma interro-Negação

Forma simple

could I not stiffen?
could you not stiffen?
could she not stiffen?
could we not stiffen?
could you not stiffen?
could they not stiffen?

Forma com V-ing

could I not be stiffening?
could you not be stiffening?
could she not be stiffening?
could we not be stiffening?
could you not be stiffening?
could they not be stiffening?

Perfeito

could I not have stiffened?
could you not have stiffened?
could she not have stiffened?
could we not have stiffened?
could you not have stiffened?
could they not have stiffened?

Perfeito com V-ing

could I not have been stiffening?
could you not have been stiffening?
could she not have been stiffening?
could we not have been stiffening?
could you not have been stiffening?
could they not have been stiffening?

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