Conjugação do verbo inglês
CAN UNDO

Verbo irregular: undo - undid - undone

Afirmação

Forma simple	Forma com 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
Perfeito	Perfeito com 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

Negação

Forma simple	Forma com V-ing
I cannot undo you cannot undo he cannot undo we cannot undo you cannot undo they cannot undo	I cannot be undoing you cannot be undoing he cannot be undoing we cannot be undoing you cannot be undoing they cannot be undoing
Perfeito	Perfeito com V-ing
I cannot have undone you cannot have undone he 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 he cannot have been undoing we cannot have been undoing you cannot have been undoing they cannot have been undoing

Forma interrogativa

Forma simple	Forma com 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?
Perfeito	Perfeito com 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-Negação

Forma simple	Forma com V-ing
can I not undo? can you not undo? can he 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 he not be undoing? can we not be undoing? can you not be undoing? can they not be undoing?
Perfeito	Perfeito com V-ing
can I not have undone? can you not have undone? can he 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 he not have been undoing? can we not have been undoing? can you not have been undoing? can they not have been undoing?