some/ something与any/anything的区别和用法

some/something用于肯定句，any／anything用于否定句，上课／教材都对，但是疑问句课堂上就错误
疑问句中通常用any等，但是上课都所can／would提问才使用some／something，其实不然。
Is there something to eat?也对，表示我闻到食物味道。
Is there anything to eat?也对。