could rust
Verbo regolare: rust - rusted- rusted

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could rust
you could rust
he could rust
we could rust
you could rust
they could rust 	I could be rusting
you could be rusting
he could be rusting
we could be rusting
you could be rusting
they could be rusting	I could have rusted
you could have rusted
he could have rusted
we could have rusted
you could have rusted
they could have rusted	I could have been rusting
you could have been rusting
he could have been rusting
we could have been rusting
you could have been rusting
they could have been rusting	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not rust
you could not rust
he could not rust
we could not rust
you could not rust
they could not rust 	I could not be rusting
you could not be rusting
he could not be rusting
we could not be rusting
you could not be rusting
they could not be rusting	I could not have rusted
you could not have rusted
he could not have rusted
we could not have rusted
you could not have rusted
they could not have rusted	I could not have been rusting
you could not have been rusting
he could not have been rusting
we could not have been rusting
you could not have been rusting
they could not have been rusting	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I rust?
could you rust?
could he rust?
could we rust?
could you rust?
could they rust? 	could I be rusting?
could you be rusting?
could he be rusting?
could we be rusting?
could you be rusting?
could they be rusting? 	could I have rusted?
could you have rusted?
could he have rusted?
could we have rusted?
could you have rusted?
could they have rusted? 	could I have been rusting?
could you have been rusting?
could he have been rusting?
could we have been rusting?
could you have been rusting?
could they have been rusting? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not rust?
could you not rust?
could he not rust?
could we not rust?
could you not rust?
could they not rust? 	could I not be rusting?
could you not be rusting?
could he not be rusting?
could we not be rusting?
could you not be rusting?
could they not be rusting? 	could I not have rusted?
could you not have rusted?
could he not have rusted?
could we not have rusted?
could you not have rusted?
could they not have rusted? 	could I not have been rusting?
could you not have been rusting?
could he not have been rusting?
could we not have been rusting?
could you not have been rusting?
could they not have been rusting?