Conjugación del verbo inglés
COULD AIRMAIL

Verbo regular: airmail - airmailed - airmailed

Afirmación

Forma simple	Forma con V-ing
I could airmail you could airmail he could airmail we could airmail you could airmail they could airmail	I could be airmailing you could be airmailing he could be airmailing we could be airmailing you could be airmailing they could be airmailing
Perfecto	Perfecto con V-ing
I could have airmailed you could have airmailed he could have airmailed we could have airmailed you could have airmailed they could have airmailed	I could have been airmailing you could have been airmailing he could have been airmailing we could have been airmailing you could have been airmailing they could have been airmailing

Negación

Forma simple	Forma con V-ing
I could not airmail you could not airmail he could not airmail we could not airmail you could not airmail they could not airmail	I could not be airmailing you could not be airmailing he could not be airmailing we could not be airmailing you could not be airmailing they could not be airmailing
Perfecto	Perfecto con V-ing
I could not have airmailed you could not have airmailed he could not have airmailed we could not have airmailed you could not have airmailed they could not have airmailed	I could not have been airmailing you could not have been airmailing he could not have been airmailing we could not have been airmailing you could not have been airmailing they could not have been airmailing

Forma interrogativa

Forma simple	Forma con V-ing
could I airmail? could you airmail? could he airmail? could we airmail? could you airmail? could they airmail?	could I be airmailing? could you be airmailing? could he be airmailing? could we be airmailing? could you be airmailing? could they be airmailing?
Perfecto	Perfecto con V-ing
could I have airmailed? could you have airmailed? could he have airmailed? could we have airmailed? could you have airmailed? could they have airmailed?	could I have been airmailing? could you have been airmailing? could he have been airmailing? could we have been airmailing? could you have been airmailing? could they have been airmailing?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not airmail? could you not airmail? could he not airmail? could we not airmail? could you not airmail? could they not airmail?	could I not be airmailing? could you not be airmailing? could he not be airmailing? could we not be airmailing? could you not be airmailing? could they not be airmailing?
Perfecto	Perfecto con V-ing
could I not have airmailed? could you not have airmailed? could he not have airmailed? could we not have airmailed? could you not have airmailed? could they not have airmailed?	could I not have been airmailing? could you not have been airmailing? could he not have been airmailing? could we not have been airmailing? could you not have been airmailing? could they not have been airmailing?