Conjugación del verbo inglés MUST STIFFEN

Verbo regular: stiffen - stiffened - stiffened

Afirmación

Forma simple

I must stiffen
you must stiffen
he must stiffen
we must stiffen
you must stiffen
they must stiffen

Forma con V-ing

I must be stiffening
you must be stiffening
he must be stiffening
we must be stiffening
you must be stiffening
they must be stiffening

Perfecto

I must have stiffened
you must have stiffened
he must have stiffened
we must have stiffened
you must have stiffened
they must have stiffened

Perfecto con V-ing

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

Negación

Forma simple

I must not stiffen
you must not stiffen
he must not stiffen
we must not stiffen
you must not stiffen
they must not stiffen

Forma con V-ing

I must not be stiffening
you must not be stiffening
he must not be stiffening
we must not be stiffening
you must not be stiffening
they must not be stiffening

Perfecto

I must not have stiffened
you must not have stiffened
he must not have stiffened
we must not have stiffened
you must not have stiffened
they must not have stiffened

Perfecto con V-ing

I must not have been stiffening
you must not have been stiffening
he must not have been stiffening
we must not have been stiffening
you must not have been stiffening
they must not have been stiffening

Forma interrogativa

Forma simple

must I stiffen?
must you stiffen?
must he stiffen?
must we stiffen?
must you stiffen?
must they stiffen?

Forma con V-ing

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

Perfecto

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

Perfecto con V-ing

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

Forma interro-negativa

Forma simple

must I not stiffen?
must you not stiffen?
must he not stiffen?
must we not stiffen?
must you not stiffen?
must they not stiffen?

Forma con V-ing

must I not be stiffening?
must you not be stiffening?
must he not be stiffening?
must we not be stiffening?
must you not be stiffening?
must they not be stiffening?

Perfecto

must I not have stiffened?
must you not have stiffened?
must he not have stiffened?
must we not have stiffened?
must you not have stiffened?
must they not have stiffened?

Perfecto con V-ing

must I not have been stiffening?
must you not have been stiffening?
must he not have been stiffening?
must we not have been stiffening?
must you not have been stiffening?
must they not have been stiffening?

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