英语这句话有什么错误？

1.The books in the bag is kake's.

首先，books 是复数，那么谓语动词应该是are，即The books in the bag are kake's.意思是：包里面的书是kake的；其次，若想表达：包上面的书是kake的，则为 The books on the bag are kake's.

2.There are five girl's names on the paper.

首先，翻译成汉语是：纸上有五个女孩的名字。应该用名词girl做定语，即 将girl's改为girl；其次，名字是写在纸的上面的，应该用in，故正确的写法是：There are five girl names in the paper.

3.We sang English songs and do same Chinese dance last night.

and前后应该连接两个形式相同的词，前面动词过去式，那后面也应该用过去式did，正确的写法是：We sang English songs and did same Chinese dance last night.