Conjugação do verbo inglês MUST STIFFEN

Verbo regular: stiffen - stiffened - stiffened

Afirmação

Forma simple

I must stiffen
you must stiffen
she must stiffen
we must stiffen
you must stiffen
they must stiffen

Forma com V-ing

I must be stiffening
you must be stiffening
she must be stiffening
we must be stiffening
you must be stiffening
they must be stiffening

Perfeito

I must have stiffened
you must have stiffened
she must have stiffened
we must have stiffened
you must have stiffened
they must have stiffened

Perfeito com V-ing

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

Negação

Forma simple

I mustn't stiffen
you mustn't stiffen
she mustn't stiffen
we mustn't stiffen
you mustn't stiffen
they mustn't stiffen

Forma com V-ing

I mustn't be stiffening
you mustn't be stiffening
she mustn't be stiffening
we mustn't be stiffening
you mustn't be stiffening
they mustn't be stiffening

Perfeito

I mustn't have stiffened
you mustn't have stiffened
she mustn't have stiffened
we mustn't have stiffened
you mustn't have stiffened
they mustn't have stiffened

Perfeito com V-ing

I mustn't have been stiffening
you mustn't have been stiffening
she mustn't have been stiffening
we mustn't have been stiffening
you mustn't have been stiffening
they mustn't have been stiffening

Forma interrogativa

Forma simple

must I stiffen?
must you stiffen?
must she stiffen?
must we stiffen?
must you stiffen?
must they stiffen?

Forma com V-ing

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

Perfeito

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

Perfeito com V-ing

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

Forma interro-Negação

Forma simple

mustn't I stiffen?
mustn't you stiffen?
mustn't she stiffen?
mustn't we stiffen?
mustn't you stiffen?
mustn't they stiffen?

Forma com V-ing

mustn't I be stiffening?
mustn't you be stiffening?
mustn't she be stiffening?
mustn't we be stiffening?
mustn't you be stiffening?
mustn't they be stiffening?

Perfeito

mustn't I have stiffened?
mustn't you have stiffened?
mustn't she have stiffened?
mustn't we have stiffened?
mustn't you have stiffened?
mustn't they have stiffened?

Perfeito com V-ing

mustn't I have been stiffening?
mustn't you have been stiffening?
mustn't she have been stiffening?
mustn't we have been stiffening?
mustn't you have been stiffening?
mustn't they have been stiffening?

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