On rain days,they often stay at home哪里错了,怎么改
问题描述：
On rain days,they often stay at home哪里错了,怎么改
答
应该改为On rainy days ,they often stay at home.之所以改为rainy是因为day是名词，前面要用形容词修饰。
答
rain 应该改为rainy
因为形容词修饰名词
答
rain----rainy
形容词修饰名词