snow boarding是两个单词还是一个单词?还是中间有一杠（连字符）?

snow boarding是两个单词还是一个单词?还是中间有一杠（连字符）? snow-boarding什么意思? 有没有snow hard?这里的snow是个动词是snow heavy 还是hard?好像两个都是副词~是不是都可以? boarding 英语有的单词后加's有的加s',理由是?例:Linda's book boys'boarding school为什么?有什么要求么?怎么区分? 不经常下雪用英语怎么说?是It often doesn't snow here 还是It often isn't snow here? 英语翻译安徒生的 The Snow Queen 应该怎么翻译?是“白雪公主”还是“雪之女王”?那Snow White 英语翻译是两个单词 “girls boarding snow 加heavily还是heavy He came into the house snow covered and shivered?还是shivering?后面应该是填shivering?还是shivered?,这里snow covered是修饰the house 还是he? 英语中冬天是第几季 是in snow in winter还是on sonw in winter compaign与campaign的区别是两个单词,还是同意词,还是英美习惯问题,还是误写误传? snow snow snow snow 请问It is snowing.的述谓结构是什么?是BE(SNOWING)吗?还是（SNOW）?