I could unscrew you could unscrew she could unscrew we could unscrew you could unscrew they could unscrew
Forma con V-ing
I could be unscrewing you could be unscrewing she could be unscrewing we could be unscrewing you could be unscrewing they could be unscrewing
Perfecto
I could have unscrewed you could have unscrewed she could have unscrewed we could have unscrewed you could have unscrewed they could have unscrewed
Perfecto con V-ing
I could have been unscrewing you could have been unscrewing she could have been unscrewing we could have been unscrewing you could have been unscrewing they could have been unscrewing
Negación
Forma simple
I could not unscrew you could not unscrew she could not unscrew we could not unscrew you could not unscrew they could not unscrew
Forma con V-ing
I could not be unscrewing you could not be unscrewing she could not be unscrewing we could not be unscrewing you could not be unscrewing they could not be unscrewing
Perfecto
I could not have unscrewed you could not have unscrewed she could not have unscrewed we could not have unscrewed you could not have unscrewed they could not have unscrewed
Perfecto con V-ing
I could not have been unscrewing you could not have been unscrewing she could not have been unscrewing we could not have been unscrewing you could not have been unscrewing they could not have been unscrewing
Forma interrogativa
Forma simple
could I unscrew? could you unscrew? could she unscrew? could we unscrew? could you unscrew? could they unscrew?
Forma con V-ing
could I be unscrewing? could you be unscrewing? could she be unscrewing? could we be unscrewing? could you be unscrewing? could they be unscrewing?
Perfecto
could I have unscrewed? could you have unscrewed? could she have unscrewed? could we have unscrewed? could you have unscrewed? could they have unscrewed?
Perfecto con V-ing
could I have been unscrewing? could you have been unscrewing? could she have been unscrewing? could we have been unscrewing? could you have been unscrewing? could they have been unscrewing?
Forma interro-negativa
Forma simple
could I not unscrew? could you not unscrew? could she not unscrew? could we not unscrew? could you not unscrew? could they not unscrew?
Forma con V-ing
could I not be unscrewing? could you not be unscrewing? could she not be unscrewing? could we not be unscrewing? could you not be unscrewing? could they not be unscrewing?
Perfecto
could I not have unscrewed? could you not have unscrewed? could she not have unscrewed? could we not have unscrewed? could you not have unscrewed? could they not have unscrewed?
Perfecto con V-ing
could I not have been unscrewing? could you not have been unscrewing? could she not have been unscrewing? could we not have been unscrewing? could you not have been unscrewing? could they not have been unscrewing?