English verb conjugation CAN SIGN

Regular verb: sign - signed - signed

Affirmation

Simple form

I can sign
you can sign
he can sign
we can sign
you can sign
they can sign

V-ing form

I can be signing
you can be signing
he can be signing
we can be signing
you can be signing
they can be signing

Perfect

I can have signed
you can have signed
he can have signed
we can have signed
you can have signed
they can have signed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I sign?
can you sign?
can he sign?
can we sign?
can you sign?
can they sign?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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