1
general::
Phrase(s): have to do with something
to be associated with or related to something. • Sally’s unhappiness has to do with the way you insulted her. • My illness has to do with my stomach., Phrase(s): have something to do with something [and] not have anything to do with something; have nothing to do with something
to be associated with or related to something. • Does your dislike for Sally have something to do with the way she insulted you? • My illness has something to do with my lungs.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Be concerned or associated with; deal with. For example, This book has to do with the divisions within the church. [1100s] For the antonym, see HAVE NOTHING TO DO WITH.
American Heritage Idioms