immediately用作副词和连词
1. 用作副词，主要表示“立即”“马上”。如：
I answered his letter immediately. 我马上给他回了信。
有时表示在时间或空间方面很接近或直接，此时通常用于形容词、副词、介词短语等之前。如：
He lives immediately next to us. 他就住在我们隔壁。
I left immediately after I heard the news. 我一听到这消息后马上就离开了。
2. 有时可用作连词（尤其在英国英语中），意为“一……就”，相当于 as soon as。如：
Immediately he came I told him the news. 他一来我就把消息告诉了他。
I recognized her immediately I saw her. 我一看见她就立刻认出她来了。