could unshift
Verbo regular: unshift - unshifted- unshifted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could unshift
you could unshift
she could unshift
we could unshift
you could unshift
they could unshift 	I could be unshifting
you could be unshifting
she could be unshifting
we could be unshifting
you could be unshifting
they could be unshifting	I could have unshifted
you could have unshifted
she could have unshifted
we could have unshifted
you could have unshifted
they could have unshifted	I could have been unshifting
you could have been unshifting
she could have been unshifting
we could have been unshifting
you could have been unshifting
they could have been unshifting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not unshift
you could not unshift
she could not unshift
we could not unshift
you could not unshift
they could not unshift 	I could not be unshifting
you could not be unshifting
she could not be unshifting
we could not be unshifting
you could not be unshifting
they could not be unshifting	I could not have unshifted
you could not have unshifted
she could not have unshifted
we could not have unshifted
you could not have unshifted
they could not have unshifted	I could not have been unshifting
you could not have been unshifting
she could not have been unshifting
we could not have been unshifting
you could not have been unshifting
they could not have been unshifting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I unshift?
could you unshift?
could she unshift?
could we unshift?
could you unshift?
could they unshift? 	could I be unshifting?
could you be unshifting?
could she be unshifting?
could we be unshifting?
could you be unshifting?
could they be unshifting? 	could I have unshifted?
could you have unshifted?
could she have unshifted?
could we have unshifted?
could you have unshifted?
could they have unshifted? 	could I have been unshifting?
could you have been unshifting?
could she have been unshifting?
could we have been unshifting?
could you have been unshifting?
could they have been unshifting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not unshift?
could you not unshift?
could she not unshift?
could we not unshift?
could you not unshift?
could they not unshift? 	could I not be unshifting?
could you not be unshifting?
could she not be unshifting?
could we not be unshifting?
could you not be unshifting?
could they not be unshifting? 	could I not have unshifted?
could you not have unshifted?
could she not have unshifted?
could we not have unshifted?
could you not have unshifted?
could they not have unshifted? 	could I not have been unshifting?
could you not have been unshifting?
could she not have been unshifting?
could we not have been unshifting?
could you not have been unshifting?
could they not have been unshifting?