could acknowledge
Verbo regular: acknowledge - acknowledged- acknowledged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could acknowledge
you could acknowledge
he could acknowledge
we could acknowledge
you could acknowledge
they could acknowledge 	I could be acknowledging
you could be acknowledging
he could be acknowledging
we could be acknowledging
you could be acknowledging
they could be acknowledging	I could have acknowledged
you could have acknowledged
he could have acknowledged
we could have acknowledged
you could have acknowledged
they could have acknowledged	I could have been acknowledging
you could have been acknowledging
he could have been acknowledging
we could have been acknowledging
you could have been acknowledging
they could have been acknowledging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not acknowledge
you could not acknowledge
he could not acknowledge
we could not acknowledge
you could not acknowledge
they could not acknowledge 	I could not be acknowledging
you could not be acknowledging
he could not be acknowledging
we could not be acknowledging
you could not be acknowledging
they could not be acknowledging	I could not have acknowledged
you could not have acknowledged
he could not have acknowledged
we could not have acknowledged
you could not have acknowledged
they could not have acknowledged	I could not have been acknowledging
you could not have been acknowledging
he could not have been acknowledging
we could not have been acknowledging
you could not have been acknowledging
they could not have been acknowledging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I acknowledge?
could you acknowledge?
could he acknowledge?
could we acknowledge?
could you acknowledge?
could they acknowledge? 	could I be acknowledging?
could you be acknowledging?
could he be acknowledging?
could we be acknowledging?
could you be acknowledging?
could they be acknowledging? 	could I have acknowledged?
could you have acknowledged?
could he have acknowledged?
could we have acknowledged?
could you have acknowledged?
could they have acknowledged? 	could I have been acknowledging?
could you have been acknowledging?
could he have been acknowledging?
could we have been acknowledging?
could you have been acknowledging?
could they have been acknowledging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not acknowledge?
could you not acknowledge?
could he not acknowledge?
could we not acknowledge?
could you not acknowledge?
could they not acknowledge? 	could I not be acknowledging?
could you not be acknowledging?
could he not be acknowledging?
could we not be acknowledging?
could you not be acknowledging?
could they not be acknowledging? 	could I not have acknowledged?
could you not have acknowledged?
could he not have acknowledged?
could we not have acknowledged?
could you not have acknowledged?
could they not have acknowledged? 	could I not have been acknowledging?
could you not have been acknowledging?
could he not have been acknowledging?
could we not have been acknowledging?
could you not have been acknowledging?
could they not have been acknowledging?