could regrind
Verbo irregular: regrind - reground- reground

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could regrind
you could regrind
she could regrind
we could regrind
you could regrind
they could regrind 	I could be regrinding
you could be regrinding
she could be regrinding
we could be regrinding
you could be regrinding
they could be regrinding	I could have reground
you could have reground
she could have reground
we could have reground
you could have reground
they could have reground	I could have been regrinding
you could have been regrinding
she could have been regrinding
we could have been regrinding
you could have been regrinding
they could have been regrinding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not regrind
you could not regrind
she could not regrind
we could not regrind
you could not regrind
they could not regrind 	I could not be regrinding
you could not be regrinding
she could not be regrinding
we could not be regrinding
you could not be regrinding
they could not be regrinding	I could not have reground
you could not have reground
she could not have reground
we could not have reground
you could not have reground
they could not have reground	I could not have been regrinding
you could not have been regrinding
she could not have been regrinding
we could not have been regrinding
you could not have been regrinding
they could not have been regrinding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I regrind?
could you regrind?
could she regrind?
could we regrind?
could you regrind?
could they regrind? 	could I be regrinding?
could you be regrinding?
could she be regrinding?
could we be regrinding?
could you be regrinding?
could they be regrinding? 	could I have reground?
could you have reground?
could she have reground?
could we have reground?
could you have reground?
could they have reground? 	could I have been regrinding?
could you have been regrinding?
could she have been regrinding?
could we have been regrinding?
could you have been regrinding?
could they have been regrinding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not regrind?
could you not regrind?
could she not regrind?
could we not regrind?
could you not regrind?
could they not regrind? 	could I not be regrinding?
could you not be regrinding?
could she not be regrinding?
could we not be regrinding?
could you not be regrinding?
could they not be regrinding? 	could I not have reground?
could you not have reground?
could she not have reground?
could we not have reground?
could you not have reground?
could they not have reground? 	could I not have been regrinding?
could you not have been regrinding?
could she not have been regrinding?
could we not have been regrinding?
could you not have been regrinding?
could they not have been regrinding?