Conjugación del verbo inglés
COULD GRAFT

Verbo regular: graft - grafted - grafted

Afirmación

Forma simple	Forma con V-ing
I could graft you could graft he could graft we could graft you could graft they could graft	I could be grafting you could be grafting he could be grafting we could be grafting you could be grafting they could be grafting
Perfecto	Perfecto con V-ing
I could have grafted you could have grafted he could have grafted we could have grafted you could have grafted they could have grafted	I could have been grafting you could have been grafting he could have been grafting we could have been grafting you could have been grafting they could have been grafting

Negación

Forma simple	Forma con V-ing
I couldn't graft you couldn't graft he couldn't graft we couldn't graft you couldn't graft they couldn't graft	I couldn't be grafting you couldn't be grafting he couldn't be grafting we couldn't be grafting you couldn't be grafting they couldn't be grafting
Perfecto	Perfecto con V-ing
I couldn't have grafted you couldn't have grafted he couldn't have grafted we couldn't have grafted you couldn't have grafted they couldn't have grafted	I couldn't have been grafting you couldn't have been grafting he couldn't have been grafting we couldn't have been grafting you couldn't have been grafting they couldn't have been grafting

Forma interrogativa

Forma simple	Forma con V-ing
could I graft? could you graft? could he graft? could we graft? could you graft? could they graft?	could I be grafting? could you be grafting? could he be grafting? could we be grafting? could you be grafting? could they be grafting?
Perfecto	Perfecto con V-ing
could I have grafted? could you have grafted? could he have grafted? could we have grafted? could you have grafted? could they have grafted?	could I have been grafting? could you have been grafting? could he have been grafting? could we have been grafting? could you have been grafting? could they have been grafting?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I graft? couldn't you graft? couldn't he graft? couldn't we graft? couldn't you graft? couldn't they graft?	couldn't I be grafting? couldn't you be grafting? couldn't he be grafting? couldn't we be grafting? couldn't you be grafting? couldn't they be grafting?
Perfecto	Perfecto con V-ing
couldn't I have grafted? couldn't you have grafted? couldn't he have grafted? couldn't we have grafted? couldn't you have grafted? couldn't they have grafted?	couldn't I have been grafting? couldn't you have been grafting? couldn't he have been grafting? couldn't we have been grafting? couldn't you have been grafting? couldn't they have been grafting?