This is a fat boy. 怎么改为否定句
问题描述：
This is a fat boy. 怎么改为否定句
答
This isn't a fat boy.This is a fat boy 一般疑问句，肯定回答不谢
This is a fat boy. 怎么改为否定句
This isn't a fat boy.This is a fat boy 一般疑问句，肯定回答不谢