could grab
Verbo regular: grab - grabbed- grabbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could grab
you could grab
she could grab
we could grab
you could grab
they could grab 	I could be grabbing
you could be grabbing
she could be grabbing
we could be grabbing
you could be grabbing
they could be grabbing	I could have grabbed
you could have grabbed
she could have grabbed
we could have grabbed
you could have grabbed
they could have grabbed	I could have been grabbing
you could have been grabbing
she could have been grabbing
we could have been grabbing
you could have been grabbing
they could have been grabbing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not grab
you could not grab
she could not grab
we could not grab
you could not grab
they could not grab 	I could not be grabbing
you could not be grabbing
she could not be grabbing
we could not be grabbing
you could not be grabbing
they could not be grabbing	I could not have grabbed
you could not have grabbed
she could not have grabbed
we could not have grabbed
you could not have grabbed
they could not have grabbed	I could not have been grabbing
you could not have been grabbing
she could not have been grabbing
we could not have been grabbing
you could not have been grabbing
they could not have been grabbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I grab?
could you grab?
could she grab?
could we grab?
could you grab?
could they grab? 	could I be grabbing?
could you be grabbing?
could she be grabbing?
could we be grabbing?
could you be grabbing?
could they be grabbing? 	could I have grabbed?
could you have grabbed?
could she have grabbed?
could we have grabbed?
could you have grabbed?
could they have grabbed? 	could I have been grabbing?
could you have been grabbing?
could she have been grabbing?
could we have been grabbing?
could you have been grabbing?
could they have been grabbing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not grab?
could you not grab?
could she not grab?
could we not grab?
could you not grab?
could they not grab? 	could I not be grabbing?
could you not be grabbing?
could she not be grabbing?
could we not be grabbing?
could you not be grabbing?
could they not be grabbing? 	could I not have grabbed?
could you not have grabbed?
could she not have grabbed?
could we not have grabbed?
could you not have grabbed?
could they not have grabbed? 	could I not have been grabbing?
could you not have been grabbing?
could she not have been grabbing?
could we not have been grabbing?
could you not have been grabbing?
could they not have been grabbing?