正确答案：
It doesn't romn often a cat.
Does it romn often a cat?
解析：无be无情的动词改为否定句需要加助动词,三单用does,非三单用do.然后再加not.疑问句也一样,提前助动词,三单提前助动词,并把后边的动词还原.主语是it 不用改变,
It romns often a cat（变为否定句和一般疑问句）
正确答案：
It doesn't romn often a cat.
Does it romn often a cat?
解析：无be无情的动词改为否定句需要加助动词,三单用does,非三单用do.然后再加not.疑问句也一样,提前助动词,三单提前助动词,并把后边的动词还原.主语是it 不用改变,