English verb conjugation CAN BIFF

Regular verb: biff - biffed - biffed

Affirmation

Simple form

I can biff
you can biff
she can biff
we can biff
you can biff
they can biff

V-ing form

I can be biffing
you can be biffing
she can be biffing
we can be biffing
you can be biffing
they can be biffing

Perfect

I can have biffed
you can have biffed
she 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
she can have been biffing
we can have been biffing
you can have been biffing
they can have been biffing

Negation

Simple form

I cannot biff
you cannot biff
she cannot biff
we cannot biff
you cannot biff
they cannot biff

V-ing form

I cannot be biffing
you cannot be biffing
she cannot be biffing
we cannot be biffing
you cannot be biffing
they cannot be biffing

Perfect

I cannot have biffed
you cannot have biffed
she cannot have biffed
we cannot have biffed
you cannot have biffed
they cannot have biffed

V-ing perfect

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

Interrogative form

Simple form

can I biff?
can you biff?
can she biff?
can we biff?
can you biff?
can they biff?

V-ing form

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

Perfect

can I have biffed?
can you have biffed?
can she 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 she have been biffing?
can we have been biffing?
can you have been biffing?
can they have been biffing?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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