It hasn't got four legs. Has it got four legs? It doesn't eat other animals. Does it eat other animals? It's not smaller than a lion. Is it smaller than a lion? It can't run very fast. Can it run very fast? 否定句：助动词（有do，does，did）或情态动词（有must，can，should，may，shall等）或系动词（有is，are，am）改成否定的就好了，就是加个not 一般疑问句：把助动词拉到句子开头，其他单词语序不变。。。
