English verb conjugation CAN STIFFER

Regular verb: stiffer - stiffered - stiffered

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

I can stiffer
you can stiffer
he can stiffer
we can stiffer
you can stiffer
they can stiffer

V-ing form

I can be stiffering
you can be stiffering
he can be stiffering
we can be stiffering
you can be stiffering
they can be stiffering

Perfect

I can have stiffered
you can have stiffered
he can have stiffered
we can have stiffered
you can have stiffered
they can have stiffered

V-ing perfect

I can have been stiffering
you can have been stiffering
he can have been stiffering
we can have been stiffering
you can have been stiffering
they can have been stiffering

Negation

Simple form

I cannot stiffer
you cannot stiffer
he cannot stiffer
we cannot stiffer
you cannot stiffer
they cannot stiffer

V-ing form

I cannot be stiffering
you cannot be stiffering
he cannot be stiffering
we cannot be stiffering
you cannot be stiffering
they cannot be stiffering

Perfect

I cannot have stiffered
you cannot have stiffered
he cannot have stiffered
we cannot have stiffered
you cannot have stiffered
they cannot have stiffered

V-ing perfect

I cannot have been stiffering
you cannot have been stiffering
he cannot have been stiffering
we cannot have been stiffering
you cannot have been stiffering
they cannot have been stiffering

Interrogative form

Simple form

can I stiffer?
can you stiffer?
can he stiffer?
can we stiffer?
can you stiffer?
can they stiffer?

V-ing form

can I be stiffering?
can you be stiffering?
can he be stiffering?
can we be stiffering?
can you be stiffering?
can they be stiffering?

Perfect

can I have stiffered?
can you have stiffered?
can he have stiffered?
can we have stiffered?
can you have stiffered?
can they have stiffered?

V-ing perfect

can I have been stiffering?
can you have been stiffering?
can he have been stiffering?
can we have been stiffering?
can you have been stiffering?
can they have been stiffering?

Interro-negative form

Simple form

can I not stiffer?
can you not stiffer?
can he not stiffer?
can we not stiffer?
can you not stiffer?
can they not stiffer?

V-ing form

can I not be stiffering?
can you not be stiffering?
can he not be stiffering?
can we not be stiffering?
can you not be stiffering?
can they not be stiffering?

Perfect

can I not have stiffered?
can you not have stiffered?
can he not have stiffered?
can we not have stiffered?
can you not have stiffered?
can they not have stiffered?

V-ing perfect

can I not have been stiffering?
can you not have been stiffering?
can he not have been stiffering?
can we not have been stiffering?
can you not have been stiffering?
can they not have been stiffering?

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