could reference
Verbo regolare: reference - referenced- referenced

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could reference
you could reference
he could reference
we could reference
you could reference
they could reference 	I could be referencing
you could be referencing
he could be referencing
we could be referencing
you could be referencing
they could be referencing	I could have referenced
you could have referenced
he could have referenced
we could have referenced
you could have referenced
they could have referenced	I could have been referencing
you could have been referencing
he could have been referencing
we could have been referencing
you could have been referencing
they could have been referencing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't reference
you couldn't reference
he couldn't reference
we couldn't reference
you couldn't reference
they couldn't reference 	I couldn't be referencing
you couldn't be referencing
he couldn't be referencing
we couldn't be referencing
you couldn't be referencing
they couldn't be referencing	I couldn't have referenced
you couldn't have referenced
he couldn't have referenced
we couldn't have referenced
you couldn't have referenced
they couldn't have referenced	I couldn't have been referencing
you couldn't have been referencing
he couldn't have been referencing
we couldn't have been referencing
you couldn't have been referencing
they couldn't have been referencing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I reference?
could you reference?
could he reference?
could we reference?
could you reference?
could they reference? 	could I be referencing?
could you be referencing?
could he be referencing?
could we be referencing?
could you be referencing?
could they be referencing? 	could I have referenced?
could you have referenced?
could he have referenced?
could we have referenced?
could you have referenced?
could they have referenced? 	could I have been referencing?
could you have been referencing?
could he have been referencing?
could we have been referencing?
could you have been referencing?
could they have been referencing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I reference?
couldn't you reference?
couldn't he reference?
couldn't we reference?
couldn't you reference?
couldn't they reference? 	couldn't I be referencing?
couldn't you be referencing?
couldn't he be referencing?
couldn't we be referencing?
couldn't you be referencing?
couldn't they be referencing? 	couldn't I have referenced?
couldn't you have referenced?
couldn't he have referenced?
couldn't we have referenced?
couldn't you have referenced?
couldn't they have referenced? 	couldn't I have been referencing?
couldn't you have been referencing?
couldn't he have been referencing?
couldn't we have been referencing?
couldn't you have been referencing?
couldn't they have been referencing?