I can differ you can differ she can differ we can differ you can differ they can differ
V-ing form
I can be differing you can be differing she can be differing we can be differing you can be differing they can be differing
Perfect
I can have differed you can have differed she can have differed we can have differed you can have differed they can have differed
V-ing perfect
I can have been differing you can have been differing she can have been differing we can have been differing you can have been differing they can have been differing
Negation
Simple form
I can't differ you can't differ she can't differ we can't differ you can't differ they can't differ
V-ing form
I can't be differing you can't be differing she can't be differing we can't be differing you can't be differing they can't be differing
Perfect
I can't have differed you can't have differed she can't have differed we can't have differed you can't have differed they can't have differed
V-ing perfect
I can't have been differing you can't have been differing she can't have been differing we can't have been differing you can't have been differing they can't have been differing
Interrogative form
Simple form
can I differ? can you differ? can she differ? can we differ? can you differ? can they differ?
V-ing form
can I be differing? can you be differing? can she be differing? can we be differing? can you be differing? can they be differing?
Perfect
can I have differed? can you have differed? can she have differed? can we have differed? can you have differed? can they have differed?
V-ing perfect
can I have been differing? can you have been differing? can she have been differing? can we have been differing? can you have been differing? can they have been differing?
Interro-negative form
Simple form
can't I differ? can't you differ? can't she differ? can't we differ? can't you differ? can't they differ?
V-ing form
can't I be differing? can't you be differing? can't she be differing? can't we be differing? can't you be differing? can't they be differing?
Perfect
can't I have differed? can't you have differed? can't she have differed? can't we have differed? can't you have differed? can't they have differed?
V-ing perfect
can't I have been differing? can't you have been differing? can't she have been differing? can't we have been differing? can't you have been differing? can't they have been differing?