should undersign
Verbo regular: undersign - undersigned- undersigned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd undersign
you'd undersign
he'd undersign
we'd undersign
you'd undersign
they'd undersign 	I'd be undersigning
you'd be undersigning
he'd be undersigning
we'd be undersigning
you'd be undersigning
they'd be undersigning	I should've undersigned
you should've undersigned
he should've undersigned
we should've undersigned
you should've undersigned
they should've undersigned	I should've been undersigning
you should've been undersigning
he should've been undersigning
we should've been undersigning
you should've been undersigning
they should've been undersigning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't undersign
you shouldn't undersign
he shouldn't undersign
we shouldn't undersign
you shouldn't undersign
they shouldn't undersign 	I shouldn't be undersigning
you shouldn't be undersigning
he shouldn't be undersigning
we shouldn't be undersigning
you shouldn't be undersigning
they shouldn't be undersigning	I shouldn't have undersigned
you shouldn't have undersigned
he shouldn't have undersigned
we shouldn't have undersigned
you shouldn't have undersigned
they shouldn't have undersigned	I shouldn't have been undersigning
you shouldn't have been undersigning
he shouldn't have been undersigning
we shouldn't have been undersigning
you shouldn't have been undersigning
they shouldn't have been undersigning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I undersign?
should you undersign?
should he undersign?
should we undersign?
should you undersign?
should they undersign? 	should I be undersigning?
should you be undersigning?
should he be undersigning?
should we be undersigning?
should you be undersigning?
should they be undersigning? 	should I have undersigned?
should you have undersigned?
should he have undersigned?
should we have undersigned?
should you have undersigned?
should they have undersigned? 	should I have been undersigning?
should you have been undersigning?
should he have been undersigning?
should we have been undersigning?
should you have been undersigning?
should they have been undersigning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I undersign?
shouldn't you undersign?
shouldn't he undersign?
shouldn't we undersign?
shouldn't you undersign?
shouldn't they undersign? 	shouldn't I be undersigning?
shouldn't you be undersigning?
shouldn't he be undersigning?
shouldn't we be undersigning?
shouldn't you be undersigning?
shouldn't they be undersigning? 	shouldn't I have undersigned?
shouldn't you have undersigned?
shouldn't he have undersigned?
shouldn't we have undersigned?
shouldn't you have undersigned?
shouldn't they have undersigned? 	shouldn't I have been undersigning?
shouldn't you have been undersigning?
shouldn't he have been undersigning?
shouldn't we have been undersigning?
shouldn't you have been undersigning?
shouldn't they have been undersigning?