I can differ you can differ he can differ we can differ you can differ they can differ
V-ing form
I can be differing you can be differing he can be differing we can be differing you can be differing they can be differing
Perfect
I can have differed you can have differed he 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 he 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 he 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 he 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 he 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 he 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 he differ? can we differ? can you differ? can they differ?
V-ing form
can I be differing? can you be differing? can he be differing? can we be differing? can you be differing? can they be differing?
Perfect
can I have differed? can you have differed? can he 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 he 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 he 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 he 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 he 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 he have been differing? can't we have been differing? can't you have been differing? can't they have been differing?