could rust
Verbe régulier : rust - rusted- rusted
Traduction française : rouiller - rouiller 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could rust
you could rust
she could rust
we could rust
you could rust
they could rust 	I could be rusting
you could be rusting
she could be rusting
we could be rusting
you could be rusting
they could be rusting	I could have rusted
you could have rusted
she 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
she could have been rusting
we could have been rusting
you could have been rusting
they could have been rusting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't rust
you couldn't rust
she couldn't rust
we couldn't rust
you couldn't rust
they couldn't rust 	I couldn't be rusting
you couldn't be rusting
she couldn't be rusting
we couldn't be rusting
you couldn't be rusting
they couldn't be rusting	I couldn't have rusted
you couldn't have rusted
she couldn't have rusted
we couldn't have rusted
you couldn't have rusted
they couldn't have rusted	I couldn't have been rusting
you couldn't have been rusting
she couldn't have been rusting
we couldn't have been rusting
you couldn't have been rusting
they couldn't have been rusting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I rust?
could you rust?
could she rust?
could we rust?
could you rust?
could they rust? 	could I be rusting?
could you be rusting?
could she be rusting?
could we be rusting?
could you be rusting?
could they be rusting? 	could I have rusted?
could you have rusted?
could she 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 she have been rusting?
could we have been rusting?
could you have been rusting?
could they have been rusting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I rust?
couldn't you rust?
couldn't she rust?
couldn't we rust?
couldn't you rust?
couldn't they rust? 	couldn't I be rusting?
couldn't you be rusting?
couldn't she be rusting?
couldn't we be rusting?
couldn't you be rusting?
couldn't they be rusting? 	couldn't I have rusted?
couldn't you have rusted?
couldn't she have rusted?
couldn't we have rusted?
couldn't you have rusted?
couldn't they have rusted? 	couldn't I have been rusting?
couldn't you have been rusting?
couldn't she have been rusting?
couldn't we have been rusting?
couldn't you have been rusting?
couldn't they have been rusting?