Conjugación del verbo inglés
COULD AIL

Verbo regular: ail - ailed - ailed

Afirmación

Forma simple	Forma con V-ing
I could ail you could ail he could ail we could ail you could ail they could ail	I could be ailing you could be ailing he could be ailing we could be ailing you could be ailing they could be ailing
Perfecto	Perfecto con V-ing
I could have ailed you could have ailed he could have ailed we could have ailed you could have ailed they could have ailed	I could have been ailing you could have been ailing he could have been ailing we could have been ailing you could have been ailing they could have been ailing

Negación

Forma simple	Forma con V-ing
I couldn't ail you couldn't ail he couldn't ail we couldn't ail you couldn't ail they couldn't ail	I couldn't be ailing you couldn't be ailing he couldn't be ailing we couldn't be ailing you couldn't be ailing they couldn't be ailing
Perfecto	Perfecto con V-ing
I couldn't have ailed you couldn't have ailed he couldn't have ailed we couldn't have ailed you couldn't have ailed they couldn't have ailed	I couldn't have been ailing you couldn't have been ailing he couldn't have been ailing we couldn't have been ailing you couldn't have been ailing they couldn't have been ailing

Forma interrogativa

Forma simple	Forma con V-ing
could I ail? could you ail? could he ail? could we ail? could you ail? could they ail?	could I be ailing? could you be ailing? could he be ailing? could we be ailing? could you be ailing? could they be ailing?
Perfecto	Perfecto con V-ing
could I have ailed? could you have ailed? could he have ailed? could we have ailed? could you have ailed? could they have ailed?	could I have been ailing? could you have been ailing? could he have been ailing? could we have been ailing? could you have been ailing? could they have been ailing?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I ail? couldn't you ail? couldn't he ail? couldn't we ail? couldn't you ail? couldn't they ail?	couldn't I be ailing? couldn't you be ailing? couldn't he be ailing? couldn't we be ailing? couldn't you be ailing? couldn't they be ailing?
Perfecto	Perfecto con V-ing
couldn't I have ailed? couldn't you have ailed? couldn't he have ailed? couldn't we have ailed? couldn't you have ailed? couldn't they have ailed?	couldn't I have been ailing? couldn't you have been ailing? couldn't he have been ailing? couldn't we have been ailing? couldn't you have been ailing? couldn't they have been ailing?