Conjugação do verbo inglês
COULD FAST

Verbo regular: fast - fasted - fasted

Afirmação

Forma simple	Forma com V-ing
I could fast you could fast she could fast we could fast you could fast they could fast	I could be fasting you could be fasting she could be fasting we could be fasting you could be fasting they could be fasting
Perfeito	Perfeito com V-ing
I could have fasted you could have fasted she could have fasted we could have fasted you could have fasted they could have fasted	I could have been fasting you could have been fasting she could have been fasting we could have been fasting you could have been fasting they could have been fasting

Negação

Forma simple	Forma com V-ing
I couldn't fast you couldn't fast she couldn't fast we couldn't fast you couldn't fast they couldn't fast	I couldn't be fasting you couldn't be fasting she couldn't be fasting we couldn't be fasting you couldn't be fasting they couldn't be fasting
Perfeito	Perfeito com V-ing
I couldn't have fasted you couldn't have fasted she couldn't have fasted we couldn't have fasted you couldn't have fasted they couldn't have fasted	I couldn't have been fasting you couldn't have been fasting she couldn't have been fasting we couldn't have been fasting you couldn't have been fasting they couldn't have been fasting

Forma interrogativa

Forma simple	Forma com V-ing
could I fast? could you fast? could she fast? could we fast? could you fast? could they fast?	could I be fasting? could you be fasting? could she be fasting? could we be fasting? could you be fasting? could they be fasting?
Perfeito	Perfeito com V-ing
could I have fasted? could you have fasted? could she have fasted? could we have fasted? could you have fasted? could they have fasted?	could I have been fasting? could you have been fasting? could she have been fasting? could we have been fasting? could you have been fasting? could they have been fasting?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I fast? couldn't you fast? couldn't she fast? couldn't we fast? couldn't you fast? couldn't they fast?	couldn't I be fasting? couldn't you be fasting? couldn't she be fasting? couldn't we be fasting? couldn't you be fasting? couldn't they be fasting?
Perfeito	Perfeito com V-ing
couldn't I have fasted? couldn't you have fasted? couldn't she have fasted? couldn't we have fasted? couldn't you have fasted? couldn't they have fasted?	couldn't I have been fasting? couldn't you have been fasting? couldn't she have been fasting? couldn't we have been fasting? couldn't you have been fasting? couldn't they have been fasting?