I could graft you could graft he could graft we could graft you could graft they could graft
Forma com V-ing
I could be grafting you could be grafting he could be grafting we could be grafting you could be grafting they could be grafting
Perfeito
I could have grafted you could have grafted he could have grafted we could have grafted you could have grafted they could have grafted
Perfeito com V-ing
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
Negação
Forma simple
I couldn't graft you couldn't graft he couldn't graft we couldn't graft you couldn't graft they couldn't graft
Forma com V-ing
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
Perfeito
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
Perfeito com V-ing
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
could I graft? could you graft? could he graft? could we graft? could you graft? could they graft?
Forma com V-ing
could I be grafting? could you be grafting? could he be grafting? could we be grafting? could you be grafting? could they be grafting?
Perfeito
could I have grafted? could you have grafted? could he have grafted? could we have grafted? could you have grafted? could they have grafted?
Perfeito com V-ing
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-Negação
Forma simple
couldn't I graft? couldn't you graft? couldn't he graft? couldn't we graft? couldn't you graft? couldn't they graft?
Forma com V-ing
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?
Perfeito
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?
Perfeito com V-ing
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?