male gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation CAN SIGN
Regular verb: sign - signed - signed
Affirmation
Simple form
I can signyou can sign
she can sign
we can sign
you can sign
they can sign
V-ing form
I can be signingyou can be signing
she can be signing
we can be signing
you can be signing
they can be signing
Perfect
I can have signedyou can have signed
she can have signed
we can have signed
you can have signed
they can have signed
V-ing perfect
I can have been signingyou can have been signing
she 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 signyou can't sign
she can't sign
we can't sign
you can't sign
they can't sign
V-ing form
I can't be signingyou can't be signing
she can't be signing
we can't be signing
you can't be signing
they can't be signing
Perfect
I can't have signedyou can't have signed
she 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 signingyou can't have been signing
she 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 she sign?
can we sign?
can you sign?
can they sign?
V-ing form
can I be signing?can you be signing?
can she be signing?
can we be signing?
can you be signing?
can they be signing?
Perfect
can I have signed?can you have signed?
can she 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 she 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 she 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 she 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 she 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 she have been signing?
can't we have been signing?
can't you have been signing?
can't they have been signing?