is said 后一定用现在时吗was said后一定用过去式吗?

it is said that不一定的.
It is said that he was back last night.
It was said that倒是用过去时的.
It was said that he had come the night before.
soon当然可以用过去时了.
He was soon released,with a warning not toplay the song again.
他很快就被释放了,但受到警告以后不能再唱这首歌.soon不是将来吗soon很快，不久的意思，可用于将来，也可用于过去时的。如：If you apply yourself to the job in hand,you'll soon finish it.如果你努力做手头的工作，你会很快把它做完的。Soon he fell behind in the race.很快他在赛跑中落在了后面。