could naturalise
Verbo regular: naturalise - naturalised- naturalised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could naturalise
you could naturalise
he could naturalise
we could naturalise
you could naturalise
they could naturalise 	I could be naturalising
you could be naturalising
he could be naturalising
we could be naturalising
you could be naturalising
they could be naturalising	I could have naturalised
you could have naturalised
he could have naturalised
we could have naturalised
you could have naturalised
they could have naturalised	I could have been naturalising
you could have been naturalising
he could have been naturalising
we could have been naturalising
you could have been naturalising
they could have been naturalising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not naturalise
you could not naturalise
he could not naturalise
we could not naturalise
you could not naturalise
they could not naturalise 	I could not be naturalising
you could not be naturalising
he could not be naturalising
we could not be naturalising
you could not be naturalising
they could not be naturalising	I could not have naturalised
you could not have naturalised
he could not have naturalised
we could not have naturalised
you could not have naturalised
they could not have naturalised	I could not have been naturalising
you could not have been naturalising
he could not have been naturalising
we could not have been naturalising
you could not have been naturalising
they could not have been naturalising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I naturalise?
could you naturalise?
could he naturalise?
could we naturalise?
could you naturalise?
could they naturalise? 	could I be naturalising?
could you be naturalising?
could he be naturalising?
could we be naturalising?
could you be naturalising?
could they be naturalising? 	could I have naturalised?
could you have naturalised?
could he have naturalised?
could we have naturalised?
could you have naturalised?
could they have naturalised? 	could I have been naturalising?
could you have been naturalising?
could he have been naturalising?
could we have been naturalising?
could you have been naturalising?
could they have been naturalising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not naturalise?
could you not naturalise?
could he not naturalise?
could we not naturalise?
could you not naturalise?
could they not naturalise? 	could I not be naturalising?
could you not be naturalising?
could he not be naturalising?
could we not be naturalising?
could you not be naturalising?
could they not be naturalising? 	could I not have naturalised?
could you not have naturalised?
could he not have naturalised?
could we not have naturalised?
could you not have naturalised?
could they not have naturalised? 	could I not have been naturalising?
could you not have been naturalising?
could he not have been naturalising?
could we not have been naturalising?
could you not have been naturalising?
could they not have been naturalising?