Conjugación del verbo inglés
CAN UNDO

Verbo irregular: undo - undid - undone

Afirmación

Forma simple	Forma con V-ing
I can undo you can undo he can undo we can undo you can undo they can undo	I can be undoing you can be undoing he can be undoing we can be undoing you can be undoing they can be undoing
Perfecto	Perfecto con V-ing
I can have undone you can have undone he 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 he 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
I can't undo you can't undo he can't undo we can't undo you can't undo they can't undo	I can't be undoing you can't be undoing he can't be undoing we can't be undoing you can't be undoing they can't be undoing
Perfecto	Perfecto con V-ing
I can't have undone you can't have undone he can't have undone we can't have undone you can't have undone they can't have undone	I can't have been undoing you can't have been undoing he can't have been undoing we can't have been undoing you can't have been undoing they can't have been undoing

Forma interrogativa

Forma simple	Forma con V-ing
can I undo? can you undo? can he undo? can we undo? can you undo? can they undo?	can I be undoing? can you be undoing? can he be undoing? can we be undoing? can you be undoing? can they be undoing?
Perfecto	Perfecto con V-ing
can I have undone? can you have undone? can he 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 he 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
can't I undo? can't you undo? can't he undo? can't we undo? can't you undo? can't they undo?	can't I be undoing? can't you be undoing? can't he be undoing? can't we be undoing? can't you be undoing? can't they be undoing?
Perfecto	Perfecto con V-ing
can't I have undone? can't you have undone? can't he have undone? can't we have undone? can't you have undone? can't they have undone?	can't I have been undoing? can't you have been undoing? can't he have been undoing? can't we have been undoing? can't you have been undoing? can't they have been undoing?