Conjugação do verbo inglês
COULD UNDERTAIN

Verbo regular: undertain - undertained - undertained

Afirmação

Forma simple	Forma com V-ing
I could undertain you could undertain he could undertain we could undertain you could undertain they could undertain	I could be undertaining you could be undertaining he could be undertaining we could be undertaining you could be undertaining they could be undertaining
Perfeito	Perfeito com V-ing
I could have undertained you could have undertained he could have undertained we could have undertained you could have undertained they could have undertained	I could have been undertaining you could have been undertaining he could have been undertaining we could have been undertaining you could have been undertaining they could have been undertaining

Negação

Forma simple	Forma com V-ing
I couldn't undertain you couldn't undertain he couldn't undertain we couldn't undertain you couldn't undertain they couldn't undertain	I couldn't be undertaining you couldn't be undertaining he couldn't be undertaining we couldn't be undertaining you couldn't be undertaining they couldn't be undertaining
Perfeito	Perfeito com V-ing
I couldn't have undertained you couldn't have undertained he couldn't have undertained we couldn't have undertained you couldn't have undertained they couldn't have undertained	I couldn't have been undertaining you couldn't have been undertaining he couldn't have been undertaining we couldn't have been undertaining you couldn't have been undertaining they couldn't have been undertaining

Forma interrogativa

Forma simple	Forma com V-ing
could I undertain? could you undertain? could he undertain? could we undertain? could you undertain? could they undertain?	could I be undertaining? could you be undertaining? could he be undertaining? could we be undertaining? could you be undertaining? could they be undertaining?
Perfeito	Perfeito com V-ing
could I have undertained? could you have undertained? could he have undertained? could we have undertained? could you have undertained? could they have undertained?	could I have been undertaining? could you have been undertaining? could he have been undertaining? could we have been undertaining? could you have been undertaining? could they have been undertaining?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I undertain? couldn't you undertain? couldn't he undertain? couldn't we undertain? couldn't you undertain? couldn't they undertain?	couldn't I be undertaining? couldn't you be undertaining? couldn't he be undertaining? couldn't we be undertaining? couldn't you be undertaining? couldn't they be undertaining?
Perfeito	Perfeito com V-ing
couldn't I have undertained? couldn't you have undertained? couldn't he have undertained? couldn't we have undertained? couldn't you have undertained? couldn't they have undertained?	couldn't I have been undertaining? couldn't you have been undertaining? couldn't he have been undertaining? couldn't we have been undertaining? couldn't you have been undertaining? couldn't they have been undertaining?