could yackety-yack
Verbo regular: yackety-yack - yackety-yacked- yackety-yacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could yackety-yack
you could yackety-yack
he could yackety-yack
we could yackety-yack
you could yackety-yack
they could yackety-yack 	I could be yackety-yacking
you could be yackety-yacking
he could be yackety-yacking
we could be yackety-yacking
you could be yackety-yacking
they could be yackety-yacking	I could have yackety-yacked
you could have yackety-yacked
he could have yackety-yacked
we could have yackety-yacked
you could have yackety-yacked
they could have yackety-yacked	I could have been yackety-yacking
you could have been yackety-yacking
he could have been yackety-yacking
we could have been yackety-yacking
you could have been yackety-yacking
they could have been yackety-yacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not yackety-yack
you could not yackety-yack
he could not yackety-yack
we could not yackety-yack
you could not yackety-yack
they could not yackety-yack 	I could not be yackety-yacking
you could not be yackety-yacking
he could not be yackety-yacking
we could not be yackety-yacking
you could not be yackety-yacking
they could not be yackety-yacking	I could not have yackety-yacked
you could not have yackety-yacked
he could not have yackety-yacked
we could not have yackety-yacked
you could not have yackety-yacked
they could not have yackety-yacked	I could not have been yackety-yacking
you could not have been yackety-yacking
he could not have been yackety-yacking
we could not have been yackety-yacking
you could not have been yackety-yacking
they could not have been yackety-yacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I yackety-yack?
could you yackety-yack?
could he yackety-yack?
could we yackety-yack?
could you yackety-yack?
could they yackety-yack? 	could I be yackety-yacking?
could you be yackety-yacking?
could he be yackety-yacking?
could we be yackety-yacking?
could you be yackety-yacking?
could they be yackety-yacking? 	could I have yackety-yacked?
could you have yackety-yacked?
could he have yackety-yacked?
could we have yackety-yacked?
could you have yackety-yacked?
could they have yackety-yacked? 	could I have been yackety-yacking?
could you have been yackety-yacking?
could he have been yackety-yacking?
could we have been yackety-yacking?
could you have been yackety-yacking?
could they have been yackety-yacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not yackety-yack?
could you not yackety-yack?
could he not yackety-yack?
could we not yackety-yack?
could you not yackety-yack?
could they not yackety-yack? 	could I not be yackety-yacking?
could you not be yackety-yacking?
could he not be yackety-yacking?
could we not be yackety-yacking?
could you not be yackety-yacking?
could they not be yackety-yacking? 	could I not have yackety-yacked?
could you not have yackety-yacked?
could he not have yackety-yacked?
could we not have yackety-yacked?
could you not have yackety-yacked?
could they not have yackety-yacked? 	could I not have been yackety-yacking?
could you not have been yackety-yacking?
could he not have been yackety-yacking?
could we not have been yackety-yacking?
could you not have been yackety-yacking?
could they not have been yackety-yacking?