English verb conjugation CAN STIFF

Regular verb: stiff - stiffed - stiffed

Affirmation

Simple form

I can stiff
you can stiff
he can stiff
we can stiff
you can stiff
they can stiff

V-ing form

I can be stiffing
you can be stiffing
he can be stiffing
we can be stiffing
you can be stiffing
they can be stiffing

Perfect

I can have stiffed
you can have stiffed
he can have stiffed
we can have stiffed
you can have stiffed
they can have stiffed

V-ing perfect

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

Negation

Simple form

I can't stiff
you can't stiff
he can't stiff
we can't stiff
you can't stiff
they can't stiff

V-ing form

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

Perfect

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

V-ing perfect

I can't have been stiffing
you can't have been stiffing
he can't have been stiffing
we can't have been stiffing
you can't have been stiffing
they can't have been stiffing

Interrogative form

Simple form

can I stiff?
can you stiff?
can he stiff?
can we stiff?
can you stiff?
can they stiff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

can't I stiff?
can't you stiff?
can't he stiff?
can't we stiff?
can't you stiff?
can't they stiff?

V-ing form

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

Perfect

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

V-ing perfect

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

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