could demonstrate
Verbo regolare: demonstrate - demonstrated- demonstrated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could demonstrate
you could demonstrate
she could demonstrate
we could demonstrate
you could demonstrate
they could demonstrate 	I could be demonstrating
you could be demonstrating
she could be demonstrating
we could be demonstrating
you could be demonstrating
they could be demonstrating	I could have demonstrated
you could have demonstrated
she could have demonstrated
we could have demonstrated
you could have demonstrated
they could have demonstrated	I could have been demonstrating
you could have been demonstrating
she could have been demonstrating
we could have been demonstrating
you could have been demonstrating
they could have been demonstrating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not demonstrate
you could not demonstrate
she could not demonstrate
we could not demonstrate
you could not demonstrate
they could not demonstrate 	I could not be demonstrating
you could not be demonstrating
she could not be demonstrating
we could not be demonstrating
you could not be demonstrating
they could not be demonstrating	I could not have demonstrated
you could not have demonstrated
she could not have demonstrated
we could not have demonstrated
you could not have demonstrated
they could not have demonstrated	I could not have been demonstrating
you could not have been demonstrating
she could not have been demonstrating
we could not have been demonstrating
you could not have been demonstrating
they could not have been demonstrating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I demonstrate?
could you demonstrate?
could she demonstrate?
could we demonstrate?
could you demonstrate?
could they demonstrate? 	could I be demonstrating?
could you be demonstrating?
could she be demonstrating?
could we be demonstrating?
could you be demonstrating?
could they be demonstrating? 	could I have demonstrated?
could you have demonstrated?
could she have demonstrated?
could we have demonstrated?
could you have demonstrated?
could they have demonstrated? 	could I have been demonstrating?
could you have been demonstrating?
could she have been demonstrating?
could we have been demonstrating?
could you have been demonstrating?
could they have been demonstrating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not demonstrate?
could you not demonstrate?
could she not demonstrate?
could we not demonstrate?
could you not demonstrate?
could they not demonstrate? 	could I not be demonstrating?
could you not be demonstrating?
could she not be demonstrating?
could we not be demonstrating?
could you not be demonstrating?
could they not be demonstrating? 	could I not have demonstrated?
could you not have demonstrated?
could she not have demonstrated?
could we not have demonstrated?
could you not have demonstrated?
could they not have demonstrated? 	could I not have been demonstrating?
could you not have been demonstrating?
could she not have been demonstrating?
could we not have been demonstrating?
could you not have been demonstrating?
could they not have been demonstrating?