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 can't stiffer
you can't stiffer
he can't stiffer
we can't stiffer
you can't stiffer
they can't stiffer

V-ing form

I can't be stiffering
you can't be stiffering
he can't be stiffering
we can't be stiffering
you can't be stiffering
they can't be stiffering

Perfect

I can't have stiffered
you can't have stiffered
he can't have stiffered
we can't have stiffered
you can't have stiffered
they can't have stiffered

V-ing perfect

I can't have been stiffering
you can't have been stiffering
he can't have been stiffering
we can't have been stiffering
you can't have been stiffering
they can't 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't I stiffer?
can't you stiffer?
can't he stiffer?
can't we stiffer?
can't you stiffer?
can't they stiffer?

V-ing form

can't I be stiffering?
can't you be stiffering?
can't he be stiffering?
can't we be stiffering?
can't you be stiffering?
can't they be stiffering?

Perfect

can't I have stiffered?
can't you have stiffered?
can't he have stiffered?
can't we have stiffered?
can't you have stiffered?
can't they have stiffered?

V-ing perfect

can't I have been stiffering?
can't you have been stiffering?
can't he have been stiffering?
can't we have been stiffering?
can't you have been stiffering?
can't they have been stiffering?

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