高一英语改错题：改错：Father was sitting on the sofa at ease while mother was preparing for lunch.
问题描述：
高一英语改错题：
改错：Father was sitting on the sofa at ease while mother was preparing for lunch.
答
我认为这个句子没有错
答
Father was sitting on the sofa at ease while mother was prepared for lunch.
答
Father sat on the sofa at ease while mother was preparing lunch.
sit 不需要用进行时,并且prepare是及物动词,不需要加介词for.
答
while两边不能有时态一致，所以应该改动后面的was ing为ed