Verbo regular: undertain - undertained - undertained
Afirmación
Forma simple
I could undertain you could undertain she could undertain we could undertain you could undertain they could undertain
Forma con V-ing
I could be undertaining you could be undertaining she could be undertaining we could be undertaining you could be undertaining they could be undertaining
Perfecto
I could have undertained you could have undertained she could have undertained we could have undertained you could have undertained they could have undertained
Perfecto con V-ing
I could have been undertaining you could have been undertaining she could have been undertaining we could have been undertaining you could have been undertaining they could have been undertaining
Negación
Forma simple
I couldn't undertain you couldn't undertain she couldn't undertain we couldn't undertain you couldn't undertain they couldn't undertain
Forma con V-ing
I couldn't be undertaining you couldn't be undertaining she couldn't be undertaining we couldn't be undertaining you couldn't be undertaining they couldn't be undertaining
Perfecto
I couldn't have undertained you couldn't have undertained she couldn't have undertained we couldn't have undertained you couldn't have undertained they couldn't have undertained
Perfecto con V-ing
I couldn't have been undertaining you couldn't have been undertaining she 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
could I undertain? could you undertain? could she undertain? could we undertain? could you undertain? could they undertain?
Forma con V-ing
could I be undertaining? could you be undertaining? could she be undertaining? could we be undertaining? could you be undertaining? could they be undertaining?
Perfecto
could I have undertained? could you have undertained? could she have undertained? could we have undertained? could you have undertained? could they have undertained?
Perfecto con V-ing
could I have been undertaining? could you have been undertaining? could she have been undertaining? could we have been undertaining? could you have been undertaining? could they have been undertaining?
Forma interro-negativa
Forma simple
couldn't I undertain? couldn't you undertain? couldn't she undertain? couldn't we undertain? couldn't you undertain? couldn't they undertain?
Forma con V-ing
couldn't I be undertaining? couldn't you be undertaining? couldn't she be undertaining? couldn't we be undertaining? couldn't you be undertaining? couldn't they be undertaining?
Perfecto
couldn't I have undertained? couldn't you have undertained? couldn't she have undertained? couldn't we have undertained? couldn't you have undertained? couldn't they have undertained?
Perfecto con V-ing
couldn't I have been undertaining? couldn't you have been undertaining? couldn't she have been undertaining? couldn't we have been undertaining? couldn't you have been undertaining? couldn't they have been undertaining?