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 can't undersign
you can't undersign
he can't undersign
we can't undersign
you can't undersign
they can't undersign

V-ing form

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

Perfect

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

V-ing perfect

I can't have been undersigning
you can't have been undersigning
he can't have been undersigning
we can't have been undersigning
you can't have been undersigning
they can't 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't I undersign?
can't you undersign?
can't he undersign?
can't we undersign?
can't you undersign?
can't they undersign?

V-ing form

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

Perfect

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

V-ing perfect

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

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