People said that the movie was very interesting.
⇒ It was said that the movie was very interesting.
People said that the movie was very interesting.
⇒ It was said that the movie was very interesting.
Said chia ở quá khứ → dùng bị động là was said
Mệnh đề sau ở quá khứ đơn (was very interesting) → giữ nguyên thì.