could still
Verbo regular: still - stilled- stilled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could still
you could still
he could still
we could still
you could still
they could still 	I could be stilling
you could be stilling
he could be stilling
we could be stilling
you could be stilling
they could be stilling	I could have stilled
you could have stilled
he could have stilled
we could have stilled
you could have stilled
they could have stilled	I could have been stilling
you could have been stilling
he could have been stilling
we could have been stilling
you could have been stilling
they could have been stilling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not still
you could not still
he could not still
we could not still
you could not still
they could not still 	I could not be stilling
you could not be stilling
he could not be stilling
we could not be stilling
you could not be stilling
they could not be stilling	I could not have stilled
you could not have stilled
he could not have stilled
we could not have stilled
you could not have stilled
they could not have stilled	I could not have been stilling
you could not have been stilling
he could not have been stilling
we could not have been stilling
you could not have been stilling
they could not have been stilling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I still?
could you still?
could he still?
could we still?
could you still?
could they still? 	could I be stilling?
could you be stilling?
could he be stilling?
could we be stilling?
could you be stilling?
could they be stilling? 	could I have stilled?
could you have stilled?
could he have stilled?
could we have stilled?
could you have stilled?
could they have stilled? 	could I have been stilling?
could you have been stilling?
could he have been stilling?
could we have been stilling?
could you have been stilling?
could they have been stilling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not still?
could you not still?
could he not still?
could we not still?
could you not still?
could they not still? 	could I not be stilling?
could you not be stilling?
could he not be stilling?
could we not be stilling?
could you not be stilling?
could they not be stilling? 	could I not have stilled?
could you not have stilled?
could he not have stilled?
could we not have stilled?
could you not have stilled?
could they not have stilled? 	could I not have been stilling?
could you not have been stilling?
could he not have been stilling?
could we not have been stilling?
could you not have been stilling?
could they not have been stilling?