I can finger you can finger he can finger we can finger you can finger they can finger
V-ing form
I can be fingering you can be fingering he can be fingering we can be fingering you can be fingering they can be fingering
Perfect
I can have fingered you can have fingered he can have fingered we can have fingered you can have fingered they can have fingered
V-ing perfect
I can have been fingering you can have been fingering he can have been fingering we can have been fingering you can have been fingering they can have been fingering
Negation
Simple form
I cannot finger you cannot finger he cannot finger we cannot finger you cannot finger they cannot finger
V-ing form
I cannot be fingering you cannot be fingering he cannot be fingering we cannot be fingering you cannot be fingering they cannot be fingering
Perfect
I cannot have fingered you cannot have fingered he cannot have fingered we cannot have fingered you cannot have fingered they cannot have fingered
V-ing perfect
I cannot have been fingering you cannot have been fingering he cannot have been fingering we cannot have been fingering you cannot have been fingering they cannot have been fingering
Interrogative form
Simple form
can I finger? can you finger? can he finger? can we finger? can you finger? can they finger?
V-ing form
can I be fingering? can you be fingering? can he be fingering? can we be fingering? can you be fingering? can they be fingering?
Perfect
can I have fingered? can you have fingered? can he have fingered? can we have fingered? can you have fingered? can they have fingered?
V-ing perfect
can I have been fingering? can you have been fingering? can he have been fingering? can we have been fingering? can you have been fingering? can they have been fingering?
Interro-negative form
Simple form
can I not finger? can you not finger? can he not finger? can we not finger? can you not finger? can they not finger?
V-ing form
can I not be fingering? can you not be fingering? can he not be fingering? can we not be fingering? can you not be fingering? can they not be fingering?
Perfect
can I not have fingered? can you not have fingered? can he not have fingered? can we not have fingered? can you not have fingered? can they not have fingered?
V-ing perfect
can I not have been fingering? can you not have been fingering? can he not have been fingering? can we not have been fingering? can you not have been fingering? can they not have been fingering?