as soon as引导时间状语从句，表过去，又可以表示将来。
例句
Wed like it as soon as possible.
我们希望越快越好。
Ill call you as soon as I get home.
我一到家就给你打电话。
As soon as he got home, the phone rang.
他一到家，电话就响了。
I unpacked my bags as soon as I arrived.
我一到达就打开行李，整理衣物。
The dogs ran off as soon as we appeared.
我们一露面狗就跑了。
