English verb conjugation CAN RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form

I can riff
you can riff
she can riff
we can riff
you can riff
they can riff

V-ing form

I can be riffing
you can be riffing
she can be riffing
we can be riffing
you can be riffing
they can be riffing

Perfect

I can have riffed
you can have riffed
she can have riffed
we can have riffed
you can have riffed
they can have riffed

V-ing perfect

I can have been riffing
you can have been riffing
she can have been riffing
we can have been riffing
you can have been riffing
they can have been riffing

Negation

Simple form

I can't riff
you can't riff
she can't riff
we can't riff
you can't riff
they can't riff

V-ing form

I can't be riffing
you can't be riffing
she can't be riffing
we can't be riffing
you can't be riffing
they can't be riffing

Perfect

I can't have riffed
you can't have riffed
she can't have riffed
we can't have riffed
you can't have riffed
they can't have riffed

V-ing perfect

I can't have been riffing
you can't have been riffing
she can't have been riffing
we can't have been riffing
you can't have been riffing
they can't have been riffing

Interrogative form

Simple form

can I riff?
can you riff?
can she riff?
can we riff?
can you riff?
can they riff?

V-ing form

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

Perfect

can I have riffed?
can you have riffed?
can she have riffed?
can we have riffed?
can you have riffed?
can they have riffed?

V-ing perfect

can I have been riffing?
can you have been riffing?
can she have been riffing?
can we have been riffing?
can you have been riffing?
can they have been riffing?

Interro-negative form

Simple form

can't I riff?
can't you riff?
can't she riff?
can't we riff?
can't you riff?
can't they riff?

V-ing form

can't I be riffing?
can't you be riffing?
can't she be riffing?
can't we be riffing?
can't you be riffing?
can't they be riffing?

Perfect

can't I have riffed?
can't you have riffed?
can't she have riffed?
can't we have riffed?
can't you have riffed?
can't they have riffed?

V-ing perfect

can't I have been riffing?
can't you have been riffing?
can't she have been riffing?
can't we have been riffing?
can't you have been riffing?
can't they have been riffing?

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