Grammar girl-Neither A nor B

Seaching for the neither which hasn't been figured out before the search, I finally got the answer for my long curiosity. I wasn't sure which verb to use for neither A nor B, but i got the clear image for this. The use of singular verb and plurar verb depend on the closer noun from verb. Before I hear the clear definiton, I just follow the grammar rules for crrelative conjunction. No native speakers are saying why and how to use for this clearly. It could be nothing to others, but it was someting to me to know.!