English verb conjugation CAN BIFF

Regular verb: biff - biffed - biffed

Affirmation

Simple form

I can biff
you can biff
he can biff
we can biff
you can biff
they can biff

V-ing form

I can be biffing
you can be biffing
he can be biffing
we can be biffing
you can be biffing
they can be biffing

Perfect

I can have biffed
you can have biffed
he can have biffed
we can have biffed
you can have biffed
they can have biffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I biff?
can you biff?
can he biff?
can we biff?
can you biff?
can they biff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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