什么是 “It is said that”？
“It is said that...” 是英语中一种常见的被动语态结构，用于转述他人所说的话，而不明确指出说话人是谁。
它相当于中文里的“据说……”、“人们说……”。
基本结构
标准句型为：
It is said that + 主语 + 谓语 + ...
例如：
- It is said that he is a genius.（据说他是个天才。）
- It is said that the temple was built in the 12th century.（据说这座寺庙建于12世纪。）
其他类似表达
除了 “It is said that”，英语中还有许多类似的被动结构，用于表达传闻、观点或普遍看法：
- It is believed that...（人们相信……）
- It is thought that...（人们认为……）
- It is reported that...（据报道……）
- It is known that...（众所周知……）
主动语态与被动语态的转换
“It is said that...” 可以转换为主动语态，但通常会省略主语（如 people, they）：
- People say that he is rich. → It is said that he is rich.
- They believe she has left the country. → It is believed that she has left the country.
注意事项
- 该结构多用于书面语或正式场合。
- 时态可根据上下文变化，如：
It was said that...（过去）。 - 不要与 “He is said to...” 混淆，后者是另一种简化形式（如：He is said to be rich.）。