Conjugación del verbo inglés
COULD RUST

Verbo regular: rust - rusted - rusted

Afirmación

Forma simple	Forma 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
Perfecto	Perfecto con V-ing
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

Negación

Forma simple	Forma con V-ing
I couldn't rust you couldn't rust he 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 he couldn't be rusting we couldn't be rusting you couldn't be rusting they couldn't be rusting
Perfecto	Perfecto con V-ing
I couldn't have rusted you couldn't have rusted he 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 he couldn't have been rusting we couldn't have been rusting you couldn't have been rusting they couldn't have been rusting

Forma interrogativa

Forma simple	Forma 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?
Perfecto	Perfecto con V-ing
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 simple	Forma con V-ing
couldn't I rust? couldn't you rust? couldn't he 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 he be rusting? couldn't we be rusting? couldn't you be rusting? couldn't they be rusting?
Perfecto	Perfecto con V-ing
couldn't I have rusted? couldn't you have rusted? couldn't he 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 he have been rusting? couldn't we have been rusting? couldn't you have been rusting? couldn't they have been rusting?