can undo
Verbo irregular: undo - undid- undone

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can undo
you can undo
she can undo
we can undo
you can undo
they can undo 	I can be undoing
you can be undoing
she can be undoing
we can be undoing
you can be undoing
they can be undoing	I can have undone
you can have undone
she can have undone
we can have undone
you can have undone
they can have undone	I can have been undoing
you can have been undoing
she can have been undoing
we can have been undoing
you can have been undoing
they can have been undoing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot undo
you cannot undo
she cannot undo
we cannot undo
you cannot undo
they cannot undo 	I cannot be undoing
you cannot be undoing
she cannot be undoing
we cannot be undoing
you cannot be undoing
they cannot be undoing	I cannot have undone
you cannot have undone
she cannot have undone
we cannot have undone
you cannot have undone
they cannot have undone	I cannot have been undoing
you cannot have been undoing
she cannot have been undoing
we cannot have been undoing
you cannot have been undoing
they cannot have been undoing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I undo?
can you undo?
can she undo?
can we undo?
can you undo?
can they undo? 	can I be undoing?
can you be undoing?
can she be undoing?
can we be undoing?
can you be undoing?
can they be undoing? 	can I have undone?
can you have undone?
can she have undone?
can we have undone?
can you have undone?
can they have undone? 	can I have been undoing?
can you have been undoing?
can she have been undoing?
can we have been undoing?
can you have been undoing?
can they have been undoing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not undo?
can you not undo?
can she not undo?
can we not undo?
can you not undo?
can they not undo? 	can I not be undoing?
can you not be undoing?
can she not be undoing?
can we not be undoing?
can you not be undoing?
can they not be undoing? 	can I not have undone?
can you not have undone?
can she not have undone?
can we not have undone?
can you not have undone?
can they not have undone? 	can I not have been undoing?
can you not have been undoing?
can she not have been undoing?
can we not have been undoing?
can you not have been undoing?
can they not have been undoing?