English verb conjugation
CAN DIFFER

Regular verb: differ - differed - differed

Affirmation

Simple form	V-ing form
I can differ you can differ he can differ we can differ you can differ they can differ	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
can I differ? can you differ? can he differ? can we differ? can you differ? can they differ?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?