Conjugación del verbo inglés
COULD POSTFIX

Verbo regular: postfix - postfixed - postfixed

Afirmación

Forma simple	Forma con V-ing
I could postfix you could postfix he could postfix we could postfix you could postfix they could postfix	I could be postfixing you could be postfixing he could be postfixing we could be postfixing you could be postfixing they could be postfixing
Perfecto	Perfecto con V-ing
I could have postfixed you could have postfixed he could have postfixed we could have postfixed you could have postfixed they could have postfixed	I could have been postfixing you could have been postfixing he could have been postfixing we could have been postfixing you could have been postfixing they could have been postfixing

Negación

Forma simple	Forma con V-ing
I couldn't postfix you couldn't postfix he couldn't postfix we couldn't postfix you couldn't postfix they couldn't postfix	I couldn't be postfixing you couldn't be postfixing he couldn't be postfixing we couldn't be postfixing you couldn't be postfixing they couldn't be postfixing
Perfecto	Perfecto con V-ing
I couldn't have postfixed you couldn't have postfixed he couldn't have postfixed we couldn't have postfixed you couldn't have postfixed they couldn't have postfixed	I couldn't have been postfixing you couldn't have been postfixing he couldn't have been postfixing we couldn't have been postfixing you couldn't have been postfixing they couldn't have been postfixing

Forma interrogativa

Forma simple	Forma con V-ing
could I postfix? could you postfix? could he postfix? could we postfix? could you postfix? could they postfix?	could I be postfixing? could you be postfixing? could he be postfixing? could we be postfixing? could you be postfixing? could they be postfixing?
Perfecto	Perfecto con V-ing
could I have postfixed? could you have postfixed? could he have postfixed? could we have postfixed? could you have postfixed? could they have postfixed?	could I have been postfixing? could you have been postfixing? could he have been postfixing? could we have been postfixing? could you have been postfixing? could they have been postfixing?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I postfix? couldn't you postfix? couldn't he postfix? couldn't we postfix? couldn't you postfix? couldn't they postfix?	couldn't I be postfixing? couldn't you be postfixing? couldn't he be postfixing? couldn't we be postfixing? couldn't you be postfixing? couldn't they be postfixing?
Perfecto	Perfecto con V-ing
couldn't I have postfixed? couldn't you have postfixed? couldn't he have postfixed? couldn't we have postfixed? couldn't you have postfixed? couldn't they have postfixed?	couldn't I have been postfixing? couldn't you have been postfixing? couldn't he have been postfixing? couldn't we have been postfixing? couldn't you have been postfixing? couldn't they have been postfixing?