could scrub
Verbo regular: scrub - scrubbed- scrubbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't scrub
you couldn't scrub
she couldn't scrub
we couldn't scrub
you couldn't scrub
they couldn't scrub 	I couldn't be scrubbing
you couldn't be scrubbing
she couldn't be scrubbing
we couldn't be scrubbing
you couldn't be scrubbing
they couldn't be scrubbing	I couldn't have scrubbed
you couldn't have scrubbed
she couldn't have scrubbed
we couldn't have scrubbed
you couldn't have scrubbed
they couldn't have scrubbed	I couldn't have been scrubbing
you couldn't have been scrubbing
she couldn't have been scrubbing
we couldn't have been scrubbing
you couldn't have been scrubbing
they couldn't have been scrubbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I scrub?
couldn't you scrub?
couldn't she scrub?
couldn't we scrub?
couldn't you scrub?
couldn't they scrub? 	couldn't I be scrubbing?
couldn't you be scrubbing?
couldn't she be scrubbing?
couldn't we be scrubbing?
couldn't you be scrubbing?
couldn't they be scrubbing? 	couldn't I have scrubbed?
couldn't you have scrubbed?
couldn't she have scrubbed?
couldn't we have scrubbed?
couldn't you have scrubbed?
couldn't they have scrubbed? 	couldn't I have been scrubbing?
couldn't you have been scrubbing?
couldn't she have been scrubbing?
couldn't we have been scrubbing?
couldn't you have been scrubbing?
couldn't they have been scrubbing?