English verb conjugation CAN RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form

I can riff
you can riff
he can riff
we can riff
you can riff
they can riff

V-ing form

I can be riffing
you can be riffing
he can be riffing
we can be riffing
you can be riffing
they can be riffing

Perfect

I can have riffed
you can have riffed
he 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
he 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
he 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
he 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
he 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
he 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 he riff?
can we riff?
can you riff?
can they riff?

V-ing form

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

Perfect

can I have riffed?
can you have riffed?
can he 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 he 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 he 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 he 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 he 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 he 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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