English verb conjugation CAN UNDERSIGN

Regular verb: undersign - undersigned - undersigned

Affirmation

Simple form

I can undersign
you can undersign
he can undersign
we can undersign
you can undersign
they can undersign

V-ing form

I can be undersigning
you can be undersigning
he can be undersigning
we can be undersigning
you can be undersigning
they can be undersigning

Perfect

I can have undersigned
you can have undersigned
he can have undersigned
we can have undersigned
you can have undersigned
they can have undersigned

V-ing perfect

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

Negation

Simple form

I cannot undersign
you cannot undersign
he cannot undersign
we cannot undersign
you cannot undersign
they cannot undersign

V-ing form

I cannot be undersigning
you cannot be undersigning
he cannot be undersigning
we cannot be undersigning
you cannot be undersigning
they cannot be undersigning

Perfect

I cannot have undersigned
you cannot have undersigned
he cannot have undersigned
we cannot have undersigned
you cannot have undersigned
they cannot have undersigned

V-ing perfect

I cannot have been undersigning
you cannot have been undersigning
he cannot have been undersigning
we cannot have been undersigning
you cannot have been undersigning
they cannot have been undersigning

Interrogative form

Simple form

can I undersign?
can you undersign?
can he undersign?
can we undersign?
can you undersign?
can they undersign?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

can I not undersign?
can you not undersign?
can he not undersign?
can we not undersign?
can you not undersign?
can they not undersign?

V-ing form

can I not be undersigning?
can you not be undersigning?
can he not be undersigning?
can we not be undersigning?
can you not be undersigning?
can they not be undersigning?

Perfect

can I not have undersigned?
can you not have undersigned?
can he not have undersigned?
can we not have undersigned?
can you not have undersigned?
can they not have undersigned?

V-ing perfect

can I not have been undersigning?
can you not have been undersigning?
can he not have been undersigning?
can we not have been undersigning?
can you not have been undersigning?
can they not have been undersigning?

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