Conjugação do verbo inglês
COULD YIP

Verbo regular: yip - yipped - yipped

Afirmação

Forma simple	Forma com V-ing
I could yip you could yip he could yip we could yip you could yip they could yip	I could be yipping you could be yipping he could be yipping we could be yipping you could be yipping they could be yipping
Perfeito	Perfeito com V-ing
I could have yipped you could have yipped he could have yipped we could have yipped you could have yipped they could have yipped	I could have been yipping you could have been yipping he could have been yipping we could have been yipping you could have been yipping they could have been yipping

Negação

Forma simple	Forma com V-ing
I could not yip you could not yip he could not yip we could not yip you could not yip they could not yip	I could not be yipping you could not be yipping he could not be yipping we could not be yipping you could not be yipping they could not be yipping
Perfeito	Perfeito com V-ing
I could not have yipped you could not have yipped he could not have yipped we could not have yipped you could not have yipped they could not have yipped	I could not have been yipping you could not have been yipping he could not have been yipping we could not have been yipping you could not have been yipping they could not have been yipping

Forma interrogativa

Forma simple	Forma com V-ing
could I yip? could you yip? could he yip? could we yip? could you yip? could they yip?	could I be yipping? could you be yipping? could he be yipping? could we be yipping? could you be yipping? could they be yipping?
Perfeito	Perfeito com V-ing
could I have yipped? could you have yipped? could he have yipped? could we have yipped? could you have yipped? could they have yipped?	could I have been yipping? could you have been yipping? could he have been yipping? could we have been yipping? could you have been yipping? could they have been yipping?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not yip? could you not yip? could he not yip? could we not yip? could you not yip? could they not yip?	could I not be yipping? could you not be yipping? could he not be yipping? could we not be yipping? could you not be yipping? could they not be yipping?
Perfeito	Perfeito com V-ing
could I not have yipped? could you not have yipped? could he not have yipped? could we not have yipped? could you not have yipped? could they not have yipped?	could I not have been yipping? could you not have been yipping? could he not have been yipping? could we not have been yipping? could you not have been yipping? could they not have been yipping?