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 cannot riff
you cannot riff
he cannot riff
we cannot riff
you cannot riff
they cannot riff

V-ing form

I cannot be riffing
you cannot be riffing
he cannot be riffing
we cannot be riffing
you cannot be riffing
they cannot be riffing

Perfect

I cannot have riffed
you cannot have riffed
he cannot have riffed
we cannot have riffed
you cannot have riffed
they cannot have riffed

V-ing perfect

I cannot have been riffing
you cannot have been riffing
he cannot have been riffing
we cannot have been riffing
you cannot have been riffing
they cannot 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 I not riff?
can you not riff?
can he not riff?
can we not riff?
can you not riff?
can they not riff?

V-ing form

can I not be riffing?
can you not be riffing?
can he not be riffing?
can we not be riffing?
can you not be riffing?
can they not be riffing?

Perfect

can I not have riffed?
can you not have riffed?
can he not have riffed?
can we not have riffed?
can you not have riffed?
can they not have riffed?

V-ing perfect

can I not have been riffing?
can you not have been riffing?
can he not have been riffing?
can we not have been riffing?
can you not have been riffing?
can they not have been riffing?

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