Sb said that 和 It's said that我想了解下这两个句子所接的时态,即"that"后面所接的句子的时态有没有什么规定或限定?

Sb said that 和 It's said that我想了解下这两个句子所接的时态,即"that"后面所接的句子的时态有没有什么规定或限定?
Sb said that 和 It's said that
我想了解下这两个句子所接的时态,即"that"后面所接的句子的时态有没有什么规定或限定?

Sb said that 和 It's said that我想了解下这两个句子所接的时态,即"that"后面所接的句子的时态有没有什么规定或限定?
sb said that的意思是某人说...它所接句子的时态应该是过去时的某种时态.(客观真理除外)例：Lily said that Tom was the top student in his class.
It's said that的意思是据说.它所接句子应该根据具体情况使用相应的时态,不一定就是过去时态的一种.例：(1)It's said that he went to Paris two months ago.(2)It's said that Tom is the top student in his class.
不知道解释的清不清楚?

主句谓语动词是过去式时，从句是过去式的某种时态

过去时