I could dirty you could dirty he could dirty we could dirty you could dirty they could dirty
Forma con V-ing
I could be dirtying you could be dirtying he could be dirtying we could be dirtying you could be dirtying they could be dirtying
Perfecto
I could have dirtied you could have dirtied he could have dirtied we could have dirtied you could have dirtied they could have dirtied
Perfecto con V-ing
I could have been dirtying you could have been dirtying he could have been dirtying we could have been dirtying you could have been dirtying they could have been dirtying
Negación
Forma simple
I couldn't dirty you couldn't dirty he couldn't dirty we couldn't dirty you couldn't dirty they couldn't dirty
Forma con V-ing
I couldn't be dirtying you couldn't be dirtying he couldn't be dirtying we couldn't be dirtying you couldn't be dirtying they couldn't be dirtying
Perfecto
I couldn't have dirtied you couldn't have dirtied he couldn't have dirtied we couldn't have dirtied you couldn't have dirtied they couldn't have dirtied
Perfecto con V-ing
I couldn't have been dirtying you couldn't have been dirtying he couldn't have been dirtying we couldn't have been dirtying you couldn't have been dirtying they couldn't have been dirtying
Forma interrogativa
Forma simple
could I dirty? could you dirty? could he dirty? could we dirty? could you dirty? could they dirty?
Forma con V-ing
could I be dirtying? could you be dirtying? could he be dirtying? could we be dirtying? could you be dirtying? could they be dirtying?
Perfecto
could I have dirtied? could you have dirtied? could he have dirtied? could we have dirtied? could you have dirtied? could they have dirtied?
Perfecto con V-ing
could I have been dirtying? could you have been dirtying? could he have been dirtying? could we have been dirtying? could you have been dirtying? could they have been dirtying?
Forma interro-negativa
Forma simple
couldn't I dirty? couldn't you dirty? couldn't he dirty? couldn't we dirty? couldn't you dirty? couldn't they dirty?
Forma con V-ing
couldn't I be dirtying? couldn't you be dirtying? couldn't he be dirtying? couldn't we be dirtying? couldn't you be dirtying? couldn't they be dirtying?
Perfecto
couldn't I have dirtied? couldn't you have dirtied? couldn't he have dirtied? couldn't we have dirtied? couldn't you have dirtied? couldn't they have dirtied?
Perfecto con V-ing
couldn't I have been dirtying? couldn't you have been dirtying? couldn't he have been dirtying? couldn't we have been dirtying? couldn't you have been dirtying? couldn't they have been dirtying?