下面句子中介词over的用法

(1) "over long distances" = over = 介词 (preposition) =across (遍及/通过).
(a) You find people like him all over the world.遍及
(b) He spoke to her over the telephone .通过
(c) My friend lives over the street.在...的另一边
(2) "over" =across 越过 = He went over and spoke to them = 副词 (adverb) !