如题

因为你没有给出任何句子，只是问一个句型，就很难解释了：

况且if 有“如果”，还有“是否”的意思

所以我只能把这个句型相关用法列出来，这句子本身的意思“据说。。。”本来就是很虚拟了

It is said that...

　　据说······

　　要表达你听来、看来的没有确凿证据的事情，用这个句型最方便了。这个句型也表示你开始陈述。

　　范例

　　1. It is said that we'll have a new manager.

　　听说我们要有新经理了。

　　2. It is said by the Bible that Adam is the very first human being in the world.

　　据《圣经》说亚当是世间的第一个人。

　　3. It is said that drinking much pure water is good for health.

　　据说多喝净水有益健康。

　　会话记忆

　　A: Why don't we Chinese have our own Valentine's Day?

　　我们中国为什么没有自己的情人节呢？

　　B: Of course we have. It's on the seventh day of the seventh lunar month.

　　我们当然有，考试大是在农历七月初七。

　　A: Oh? Why is that day?

　　哦？为什么是那天？

　　B: It is said that the Cowherd and the Spinster, the lover stars in heaven, can only meet on the seventh Eve, so this day has become the Lover's Day.

　　据说牛郎星、织女星只能在七夕相会，所以这天就成了情人节

先给一个例句吧～～你想表达什么意思？

it is said that.....