could yock
Verbo regular: yock - yocked- yocked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could yock
you could yock
he could yock
we could yock
you could yock
they could yock 	I could be yocking
you could be yocking
he could be yocking
we could be yocking
you could be yocking
they could be yocking	I could have yocked
you could have yocked
he could have yocked
we could have yocked
you could have yocked
they could have yocked	I could have been yocking
you could have been yocking
he could have been yocking
we could have been yocking
you could have been yocking
they could have been yocking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not yock
you could not yock
he could not yock
we could not yock
you could not yock
they could not yock 	I could not be yocking
you could not be yocking
he could not be yocking
we could not be yocking
you could not be yocking
they could not be yocking	I could not have yocked
you could not have yocked
he could not have yocked
we could not have yocked
you could not have yocked
they could not have yocked	I could not have been yocking
you could not have been yocking
he could not have been yocking
we could not have been yocking
you could not have been yocking
they could not have been yocking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I yock?
could you yock?
could he yock?
could we yock?
could you yock?
could they yock? 	could I be yocking?
could you be yocking?
could he be yocking?
could we be yocking?
could you be yocking?
could they be yocking? 	could I have yocked?
could you have yocked?
could he have yocked?
could we have yocked?
could you have yocked?
could they have yocked? 	could I have been yocking?
could you have been yocking?
could he have been yocking?
could we have been yocking?
could you have been yocking?
could they have been yocking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not yock?
could you not yock?
could he not yock?
could we not yock?
could you not yock?
could they not yock? 	could I not be yocking?
could you not be yocking?
could he not be yocking?
could we not be yocking?
could you not be yocking?
could they not be yocking? 	could I not have yocked?
could you not have yocked?
could he not have yocked?
could we not have yocked?
could you not have yocked?
could they not have yocked? 	could I not have been yocking?
could you not have been yocking?
could he not have been yocking?
could we not have been yocking?
could you not have been yocking?
could they not have been yocking?