Conjugação do verbo inglês
COULD UNDO

Verbo irregular: undo - undid - undone

Afirmação

Forma simple	Forma com V-ing
I could undo you could undo he could undo we could undo you could undo they could undo	I could be undoing you could be undoing he could be undoing we could be undoing you could be undoing they could be undoing
Perfeito	Perfeito com V-ing
I could have undone you could have undone he could have undone we could have undone you could have undone they could have undone	I could have been undoing you could have been undoing he could have been undoing we could have been undoing you could have been undoing they could have been undoing

Negação

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

Forma interrogativa

Forma simple	Forma com V-ing
could I undo? could you undo? could he undo? could we undo? could you undo? could they undo?	could I be undoing? could you be undoing? could he be undoing? could we be undoing? could you be undoing? could they be undoing?
Perfeito	Perfeito com V-ing
could I have undone? could you have undone? could he have undone? could we have undone? could you have undone? could they have undone?	could I have been undoing? could you have been undoing? could he have been undoing? could we have been undoing? could you have been undoing? could they have been undoing?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I undo? couldn't you undo? couldn't he undo? couldn't we undo? couldn't you undo? couldn't they undo?	couldn't I be undoing? couldn't you be undoing? couldn't he be undoing? couldn't we be undoing? couldn't you be undoing? couldn't they be undoing?
Perfeito	Perfeito com V-ing
couldn't I have undone? couldn't you have undone? couldn't he have undone? couldn't we have undone? couldn't you have undone? couldn't they have undone?	couldn't I have been undoing? couldn't you have been undoing? couldn't he have been undoing? couldn't we have been undoing? couldn't you have been undoing? couldn't they have been undoing?