That is a lion的一般疑问句形式是Is that a lion?
That is a lion的意思是那是一头狮子。谓语动词用的是be动词，那么在变一般疑问句的时候，be动词可以放在句首。后面的内容抄写下来。但是要注意大小写的形式。句首单词的首字母应该大写。把that变成小写形式。
It is not a lion. He can not ride bike. Those are not ducks. Do they sing and dance ofen? There is no storybook in the library.
