正确答案:
Are your friends fine?Yes they are.No,they aren't.
Is there a book in the bag? Yes ,there is .No,there isn't.变
解析:含有be 的句子在改为一般疑问句时,首先提前be,再改变人称,如果主语是第三人称或者there be时,不用变。肯定回答,Yes,主语+be.there be结构用Yes,there be回答;否定回答:No,主语+be +not.there be结构用No,.there be+not.这样讲可以吗?