题目内容：

同义句 原句：It is said that there is no life on the moon.
变句：There ___ ___ to be no life on the moon.帮我看下啊

优质解答

填入
is said
be done 被动语态

追问：

有 there be done 的句式吗

追答：

不是 there be done 这里 is said to be 是插入语，去掉的话不影响句子。There is no life on the moon. 去掉to 之后，be动词还原为 is 短语中的is said 表示被动. it is said 是常见的插入语，it is said to do 据说..