Conjugação do verbo inglês
COULD VAIL

Verbo regular: vail - vailed - vailed

Afirmação

Forma simple	Forma com V-ing
I could vail you could vail he could vail we could vail you could vail they could vail	I could be vailing you could be vailing he could be vailing we could be vailing you could be vailing they could be vailing
Perfeito	Perfeito com V-ing
I could have vailed you could have vailed he could have vailed we could have vailed you could have vailed they could have vailed	I could have been vailing you could have been vailing he could have been vailing we could have been vailing you could have been vailing they could have been vailing

Negação

Forma simple	Forma com V-ing
I couldn't vail you couldn't vail he couldn't vail we couldn't vail you couldn't vail they couldn't vail	I couldn't be vailing you couldn't be vailing he couldn't be vailing we couldn't be vailing you couldn't be vailing they couldn't be vailing
Perfeito	Perfeito com V-ing
I couldn't have vailed you couldn't have vailed he couldn't have vailed we couldn't have vailed you couldn't have vailed they couldn't have vailed	I couldn't have been vailing you couldn't have been vailing he couldn't have been vailing we couldn't have been vailing you couldn't have been vailing they couldn't have been vailing

Forma interrogativa

Forma simple	Forma com V-ing
could I vail? could you vail? could he vail? could we vail? could you vail? could they vail?	could I be vailing? could you be vailing? could he be vailing? could we be vailing? could you be vailing? could they be vailing?
Perfeito	Perfeito com V-ing
could I have vailed? could you have vailed? could he have vailed? could we have vailed? could you have vailed? could they have vailed?	could I have been vailing? could you have been vailing? could he have been vailing? could we have been vailing? could you have been vailing? could they have been vailing?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I vail? couldn't you vail? couldn't he vail? couldn't we vail? couldn't you vail? couldn't they vail?	couldn't I be vailing? couldn't you be vailing? couldn't he be vailing? couldn't we be vailing? couldn't you be vailing? couldn't they be vailing?
Perfeito	Perfeito com V-ing
couldn't I have vailed? couldn't you have vailed? couldn't he have vailed? couldn't we have vailed? couldn't you have vailed? couldn't they have vailed?	couldn't I have been vailing? couldn't you have been vailing? couldn't he have been vailing? couldn't we have been vailing? couldn't you have been vailing? couldn't they have been vailing?