Conjugación del verbo inglés
COULD FILE

Verbo regular: file - filed - filed

Afirmación

Forma simple	Forma con V-ing
I could file you could file he could file we could file you could file they could file	I could be filing you could be filing he could be filing we could be filing you could be filing they could be filing
Perfecto	Perfecto con V-ing
I could have filed you could have filed he could have filed we could have filed you could have filed they could have filed	I could have been filing you could have been filing he could have been filing we could have been filing you could have been filing they could have been filing

Negación

Forma simple	Forma con V-ing
I couldn't file you couldn't file he couldn't file we couldn't file you couldn't file they couldn't file	I couldn't be filing you couldn't be filing he couldn't be filing we couldn't be filing you couldn't be filing they couldn't be filing
Perfecto	Perfecto con V-ing
I couldn't have filed you couldn't have filed he couldn't have filed we couldn't have filed you couldn't have filed they couldn't have filed	I couldn't have been filing you couldn't have been filing he couldn't have been filing we couldn't have been filing you couldn't have been filing they couldn't have been filing

Forma interrogativa

Forma simple	Forma con V-ing
could I file? could you file? could he file? could we file? could you file? could they file?	could I be filing? could you be filing? could he be filing? could we be filing? could you be filing? could they be filing?
Perfecto	Perfecto con V-ing
could I have filed? could you have filed? could he have filed? could we have filed? could you have filed? could they have filed?	could I have been filing? could you have been filing? could he have been filing? could we have been filing? could you have been filing? could they have been filing?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I file? couldn't you file? couldn't he file? couldn't we file? couldn't you file? couldn't they file?	couldn't I be filing? couldn't you be filing? couldn't he be filing? couldn't we be filing? couldn't you be filing? couldn't they be filing?
Perfecto	Perfecto con V-ing
couldn't I have filed? couldn't you have filed? couldn't he have filed? couldn't we have filed? couldn't you have filed? couldn't they have filed?	couldn't I have been filing? couldn't you have been filing? couldn't he have been filing? couldn't we have been filing? couldn't you have been filing? couldn't they have been filing?