could slub
Verbo regular: slub - slubed- slubed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could slub
you could slub
he could slub
we could slub
you could slub
they could slub 	I could be slubing
you could be slubing
he could be slubing
we could be slubing
you could be slubing
they could be slubing	I could have slubed
you could have slubed
he could have slubed
we could have slubed
you could have slubed
they could have slubed	I could have been slubing
you could have been slubing
he could have been slubing
we could have been slubing
you could have been slubing
they could have been slubing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not slub
you could not slub
he could not slub
we could not slub
you could not slub
they could not slub 	I could not be slubing
you could not be slubing
he could not be slubing
we could not be slubing
you could not be slubing
they could not be slubing	I could not have slubed
you could not have slubed
he could not have slubed
we could not have slubed
you could not have slubed
they could not have slubed	I could not have been slubing
you could not have been slubing
he could not have been slubing
we could not have been slubing
you could not have been slubing
they could not have been slubing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I slub?
could you slub?
could he slub?
could we slub?
could you slub?
could they slub? 	could I be slubing?
could you be slubing?
could he be slubing?
could we be slubing?
could you be slubing?
could they be slubing? 	could I have slubed?
could you have slubed?
could he have slubed?
could we have slubed?
could you have slubed?
could they have slubed? 	could I have been slubing?
could you have been slubing?
could he have been slubing?
could we have been slubing?
could you have been slubing?
could they have been slubing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not slub?
could you not slub?
could he not slub?
could we not slub?
could you not slub?
could they not slub? 	could I not be slubing?
could you not be slubing?
could he not be slubing?
could we not be slubing?
could you not be slubing?
could they not be slubing? 	could I not have slubed?
could you not have slubed?
could he not have slubed?
could we not have slubed?
could you not have slubed?
could they not have slubed? 	could I not have been slubing?
could you not have been slubing?
could he not have been slubing?
could we not have been slubing?
could you not have been slubing?
could they not have been slubing?