could scrub
Verbo regular: scrub - scrubbed- scrubbed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could scrub
you could scrub
she could scrub
we could scrub
you could scrub
they could scrub 	I could be scrubbing
you could be scrubbing
she could be scrubbing
we could be scrubbing
you could be scrubbing
they could be scrubbing	I could have scrubbed
you could have scrubbed
she could have scrubbed
we could have scrubbed
you could have scrubbed
they could have scrubbed	I could have been scrubbing
you could have been scrubbing
she could have been scrubbing
we could have been scrubbing
you could have been scrubbing
they could have been scrubbing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not scrub
you could not scrub
she could not scrub
we could not scrub
you could not scrub
they could not scrub 	I could not be scrubbing
you could not be scrubbing
she could not be scrubbing
we could not be scrubbing
you could not be scrubbing
they could not be scrubbing	I could not have scrubbed
you could not have scrubbed
she could not have scrubbed
we could not have scrubbed
you could not have scrubbed
they could not have scrubbed	I could not have been scrubbing
you could not have been scrubbing
she could not have been scrubbing
we could not have been scrubbing
you could not have been scrubbing
they could not have been scrubbing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I scrub?
could you scrub?
could she scrub?
could we scrub?
could you scrub?
could they scrub? 	could I be scrubbing?
could you be scrubbing?
could she be scrubbing?
could we be scrubbing?
could you be scrubbing?
could they be scrubbing? 	could I have scrubbed?
could you have scrubbed?
could she have scrubbed?
could we have scrubbed?
could you have scrubbed?
could they have scrubbed? 	could I have been scrubbing?
could you have been scrubbing?
could she have been scrubbing?
could we have been scrubbing?
could you have been scrubbing?
could they have been scrubbing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not scrub?
could you not scrub?
could she not scrub?
could we not scrub?
could you not scrub?
could they not scrub? 	could I not be scrubbing?
could you not be scrubbing?
could she not be scrubbing?
could we not be scrubbing?
could you not be scrubbing?
could they not be scrubbing? 	could I not have scrubbed?
could you not have scrubbed?
could she not have scrubbed?
could we not have scrubbed?
could you not have scrubbed?
could they not have scrubbed? 	could I not have been scrubbing?
could you not have been scrubbing?
could she not have been scrubbing?
could we not have been scrubbing?
could you not have been scrubbing?
could they not have been scrubbing?