I can graft you can graft he can graft we can graft you can graft they can graft
V-ing form
I can be grafting you can be grafting he can be grafting we can be grafting you can be grafting they can be grafting
Perfect
I can have grafted you can have grafted he can have grafted we can have grafted you can have grafted they can have grafted
V-ing perfect
I can have been grafting you can have been grafting he can have been grafting we can have been grafting you can have been grafting they can have been grafting
Negation
Simple form
I can't graft you can't graft he can't graft we can't graft you can't graft they can't graft
V-ing form
I can't be grafting you can't be grafting he can't be grafting we can't be grafting you can't be grafting they can't be grafting
Perfect
I can't have grafted you can't have grafted he can't have grafted we can't have grafted you can't have grafted they can't have grafted
V-ing perfect
I can't have been grafting you can't have been grafting he can't have been grafting we can't have been grafting you can't have been grafting they can't have been grafting
Interrogative form
Simple form
can I graft? can you graft? can he graft? can we graft? can you graft? can they graft?
V-ing form
can I be grafting? can you be grafting? can he be grafting? can we be grafting? can you be grafting? can they be grafting?
Perfect
can I have grafted? can you have grafted? can he have grafted? can we have grafted? can you have grafted? can they have grafted?
V-ing perfect
can I have been grafting? can you have been grafting? can he have been grafting? can we have been grafting? can you have been grafting? can they have been grafting?
Interro-negative form
Simple form
can't I graft? can't you graft? can't he graft? can't we graft? can't you graft? can't they graft?
V-ing form
can't I be grafting? can't you be grafting? can't he be grafting? can't we be grafting? can't you be grafting? can't they be grafting?
Perfect
can't I have grafted? can't you have grafted? can't he have grafted? can't we have grafted? can't you have grafted? can't they have grafted?
V-ing perfect
can't I have been grafting? can't you have been grafting? can't he have been grafting? can't we have been grafting? can't you have been grafting? can't they have been grafting?