Conjugação do verbo inglês
COULD YES

Verbo regular: yes - yesed - yesed

Afirmação

Forma simple	Forma com V-ing
I could yes you could yes he could yes we could yes you could yes they could yes	I could be yesing you could be yesing he could be yesing we could be yesing you could be yesing they could be yesing
Perfeito	Perfeito com V-ing
I could have yesed you could have yesed he could have yesed we could have yesed you could have yesed they could have yesed	I could have been yesing you could have been yesing he could have been yesing we could have been yesing you could have been yesing they could have been yesing

Negação

Forma simple	Forma com V-ing
I couldn't yes you couldn't yes he couldn't yes we couldn't yes you couldn't yes they couldn't yes	I couldn't be yesing you couldn't be yesing he couldn't be yesing we couldn't be yesing you couldn't be yesing they couldn't be yesing
Perfeito	Perfeito com V-ing
I couldn't have yesed you couldn't have yesed he couldn't have yesed we couldn't have yesed you couldn't have yesed they couldn't have yesed	I couldn't have been yesing you couldn't have been yesing he couldn't have been yesing we couldn't have been yesing you couldn't have been yesing they couldn't have been yesing

Forma interrogativa

Forma simple	Forma com V-ing
could I yes? could you yes? could he yes? could we yes? could you yes? could they yes?	could I be yesing? could you be yesing? could he be yesing? could we be yesing? could you be yesing? could they be yesing?
Perfeito	Perfeito com V-ing
could I have yesed? could you have yesed? could he have yesed? could we have yesed? could you have yesed? could they have yesed?	could I have been yesing? could you have been yesing? could he have been yesing? could we have been yesing? could you have been yesing? could they have been yesing?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I yes? couldn't you yes? couldn't he yes? couldn't we yes? couldn't you yes? couldn't they yes?	couldn't I be yesing? couldn't you be yesing? couldn't he be yesing? couldn't we be yesing? couldn't you be yesing? couldn't they be yesing?
Perfeito	Perfeito com V-ing
couldn't I have yesed? couldn't you have yesed? couldn't he have yesed? couldn't we have yesed? couldn't you have yesed? couldn't they have yesed?	couldn't I have been yesing? couldn't you have been yesing? couldn't he have been yesing? couldn't we have been yesing? couldn't you have been yesing? couldn't they have been yesing?