English verb conjugation CAN RUFF

Regular verb: ruff - ruffed - ruffed

Affirmation

Simple form

I can ruff
you can ruff
she can ruff
we can ruff
you can ruff
they can ruff

V-ing form

I can be ruffing
you can be ruffing
she can be ruffing
we can be ruffing
you can be ruffing
they can be ruffing

Perfect

I can have ruffed
you can have ruffed
she 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
she can have been ruffing
we can have been ruffing
you can have been ruffing
they can have been ruffing

Negation

Simple form

I cannot ruff
you cannot ruff
she cannot ruff
we cannot ruff
you cannot ruff
they cannot ruff

V-ing form

I cannot be ruffing
you cannot be ruffing
she cannot be ruffing
we cannot be ruffing
you cannot be ruffing
they cannot be ruffing

Perfect

I cannot have ruffed
you cannot have ruffed
she cannot have ruffed
we cannot have ruffed
you cannot have ruffed
they cannot have ruffed

V-ing perfect

I cannot have been ruffing
you cannot have been ruffing
she cannot have been ruffing
we cannot have been ruffing
you cannot have been ruffing
they cannot have been ruffing

Interrogative form

Simple form

can I ruff?
can you ruff?
can she ruff?
can we ruff?
can you ruff?
can they ruff?

V-ing form

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

Perfect

can I have ruffed?
can you have ruffed?
can she 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 she have been ruffing?
can we have been ruffing?
can you have been ruffing?
can they have been ruffing?

Interro-negative form

Simple form

can I not ruff?
can you not ruff?
can she not ruff?
can we not ruff?
can you not ruff?
can they not ruff?

V-ing form

can I not be ruffing?
can you not be ruffing?
can she not be ruffing?
can we not be ruffing?
can you not be ruffing?
can they not be ruffing?

Perfect

can I not have ruffed?
can you not have ruffed?
can she not have ruffed?
can we not have ruffed?
can you not have ruffed?
can they not have ruffed?

V-ing perfect

can I not have been ruffing?
can you not have been ruffing?
can she not have been ruffing?
can we not have been ruffing?
can you not have been ruffing?
can they not have been ruffing?

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