could treat
Verbo regular: treat - treated- treated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could treat
you could treat
he could treat
we could treat
you could treat
they could treat 	I could be treating
you could be treating
he could be treating
we could be treating
you could be treating
they could be treating	I could have treated
you could have treated
he could have treated
we could have treated
you could have treated
they could have treated	I could have been treating
you could have been treating
he could have been treating
we could have been treating
you could have been treating
they could have been treating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not treat
you could not treat
he could not treat
we could not treat
you could not treat
they could not treat 	I could not be treating
you could not be treating
he could not be treating
we could not be treating
you could not be treating
they could not be treating	I could not have treated
you could not have treated
he could not have treated
we could not have treated
you could not have treated
they could not have treated	I could not have been treating
you could not have been treating
he could not have been treating
we could not have been treating
you could not have been treating
they could not have been treating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I treat?
could you treat?
could he treat?
could we treat?
could you treat?
could they treat? 	could I be treating?
could you be treating?
could he be treating?
could we be treating?
could you be treating?
could they be treating? 	could I have treated?
could you have treated?
could he have treated?
could we have treated?
could you have treated?
could they have treated? 	could I have been treating?
could you have been treating?
could he have been treating?
could we have been treating?
could you have been treating?
could they have been treating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not treat?
could you not treat?
could he not treat?
could we not treat?
could you not treat?
could they not treat? 	could I not be treating?
could you not be treating?
could he not be treating?
could we not be treating?
could you not be treating?
could they not be treating? 	could I not have treated?
could you not have treated?
could he not have treated?
could we not have treated?
could you not have treated?
could they not have treated? 	could I not have been treating?
could you not have been treating?
could he not have been treating?
could we not have been treating?
could you not have been treating?
could they not have been treating?