could wrack
Verbo regular: wrack - wracked- wracked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could wrack
you could wrack
he could wrack
we could wrack
you could wrack
they could wrack 	I could be wracking
you could be wracking
he could be wracking
we could be wracking
you could be wracking
they could be wracking	I could have wracked
you could have wracked
he could have wracked
we could have wracked
you could have wracked
they could have wracked	I could have been wracking
you could have been wracking
he could have been wracking
we could have been wracking
you could have been wracking
they could have been wracking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't wrack
you couldn't wrack
he couldn't wrack
we couldn't wrack
you couldn't wrack
they couldn't wrack 	I couldn't be wracking
you couldn't be wracking
he couldn't be wracking
we couldn't be wracking
you couldn't be wracking
they couldn't be wracking	I couldn't have wracked
you couldn't have wracked
he couldn't have wracked
we couldn't have wracked
you couldn't have wracked
they couldn't have wracked	I couldn't have been wracking
you couldn't have been wracking
he couldn't have been wracking
we couldn't have been wracking
you couldn't have been wracking
they couldn't have been wracking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I wrack?
could you wrack?
could he wrack?
could we wrack?
could you wrack?
could they wrack? 	could I be wracking?
could you be wracking?
could he be wracking?
could we be wracking?
could you be wracking?
could they be wracking? 	could I have wracked?
could you have wracked?
could he have wracked?
could we have wracked?
could you have wracked?
could they have wracked? 	could I have been wracking?
could you have been wracking?
could he have been wracking?
could we have been wracking?
could you have been wracking?
could they have been wracking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I wrack?
couldn't you wrack?
couldn't he wrack?
couldn't we wrack?
couldn't you wrack?
couldn't they wrack? 	couldn't I be wracking?
couldn't you be wracking?
couldn't he be wracking?
couldn't we be wracking?
couldn't you be wracking?
couldn't they be wracking? 	couldn't I have wracked?
couldn't you have wracked?
couldn't he have wracked?
couldn't we have wracked?
couldn't you have wracked?
couldn't they have wracked? 	couldn't I have been wracking?
couldn't you have been wracking?
couldn't he have been wracking?
couldn't we have been wracking?
couldn't you have been wracking?
couldn't they have been wracking?