it rains sometimes

it rains sometimes sometimes it rains和it rains sometimes 是不是一样的? the it often rains,sometimes it rains quiet______ sometimes it rains 为什么填rains而不填rain? but it rains sometimes.句中rains为何是复数? It rains sometimes可以说It is sometimes rain sometimes when it rains小提琴谱 it sometimes rains in my hometown 神秘园 sometimes when it rains sometimes when it rains谁唱的 Sometimes it rains heavily.可以改写成Sometimes there is___rain but it rains sometimes中it表示的意思