It is said that 主詞+動詞
簡言之，It is said that+完整句子
ex:It is said that Ray is a famous teacher.
亦可主詞在前
現在推測:
主詞+be+said to +原V
Ray is said to be a famous teacher。
過去推測:
主詞+be+said+to have Vp.p
Ray is said to have been a good teacher(據說Ray以前是好老師)
謝謝你^^
網路上的解釋
附註1.過去推測也是現在be動詞+ to have Vp.p
也就是說主詞在前的話，那個be 只能寫is 或are