English verb conjugation CAN SPIFF

Regular verb: spiff - spiffed - spiffed

Affirmation

Simple form

I can spiff
you can spiff
she can spiff
we can spiff
you can spiff
they can spiff

V-ing form

I can be spiffing
you can be spiffing
she can be spiffing
we can be spiffing
you can be spiffing
they can be spiffing

Perfect

I can have spiffed
you can have spiffed
she can have spiffed
we can have spiffed
you can have spiffed
they can have spiffed

V-ing perfect

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

Negation

Simple form

I cannot spiff
you cannot spiff
she cannot spiff
we cannot spiff
you cannot spiff
they cannot spiff

V-ing form

I cannot be spiffing
you cannot be spiffing
she cannot be spiffing
we cannot be spiffing
you cannot be spiffing
they cannot be spiffing

Perfect

I cannot have spiffed
you cannot have spiffed
she cannot have spiffed
we cannot have spiffed
you cannot have spiffed
they cannot have spiffed

V-ing perfect

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

Interrogative form

Simple form

can I spiff?
can you spiff?
can she spiff?
can we spiff?
can you spiff?
can they spiff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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