It rains sometimes可以说It is sometimes rain 现在正在下雨如何说？It keeps raining now.keep为什么要加S

Sometimes it rains heavily.可以改写成Sometimes there is___rain but it rains sometimes 为什么没有系动词but it's rains sometimes 可以么 sometimes it rains和it rains sometimes 是不是一样的? Sometimes it rains q____ heavily. sometimes it rains 为什么填rains而不填rain? but it rains sometimes.句中rains为何是复数? sometimes when it rains谁唱的 新概念英语1第51课的问题it rains sometimes可以把sometimes放到rains前面吗?为什么?为什么有的副词就能放到动词之前 谢谢! sometimes when it rains小提琴谱神秘园《sometimes when it rains》的小提琴谱 the it often rains,sometimes it rains quiet______A.big B.small C.heavy D.heavily It rains sometimes and trees and grass turn green in it,always,hot,is,summer,and,in,sometimes,rains, Sometimes it rains quite -----.填什么,h 开头的... 填空：sometimes it rains ___in Xi'an in summer It is always warm in April and May,but it rains sometimes就这句话我产生了些疑惑,比如：but it rains sometimes中为什么rain这单词要加s呢?问题2：but it rains sometimes这句话可以把其中的语序位置换一换吗? It sometimes rains in my hometown的同义句___ ___it rains in my hometown. Summer begins in June.The weather is very hot.But sometimes it rains a lot.为什么这里要填“lot”.原因也可以翻译. 神秘园 sometimes when it rains谁有sometimes when it rains这首音乐的英文演唱版有的话发邮箱893960286