as soon as是什么时态的标志

as soon as：一...就...
As soon as I had received the letter,I ringed/called him back.
只要是状语从句，一旦遇到将来时，变为一般现在时
As soon as you arrive,you must call me.
As soon as 强调两个动作几乎是连在一起的

一般现在时

一...就...

一般将来时

将来