English verb conjugation CAN RUFF

Regular verb: ruff - ruffed - ruffed

Affirmation

Simple form

I can ruff
you can ruff
he can ruff
we can ruff
you can ruff
they can ruff

V-ing form

I can be ruffing
you can be ruffing
he can be ruffing
we can be ruffing
you can be ruffing
they can be ruffing

Perfect

I can have ruffed
you can have ruffed
he can have ruffed
we can have ruffed
you can have ruffed
they can have ruffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I ruff?
can you ruff?
can he ruff?
can we ruff?
can you ruff?
can they ruff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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