So here you are at last.（你们终于来到了）一句中的so到底作何解释?是什么用法?

So here you are at last.（你们终于来到了）一句中的so到底作何解释?是什么用法? you are here at last,here you are at last A man was killed at around 10 o’clock last night.Here are so I'm so glad you are here. 英语短文填空,You are so --1-- at night,but you can't sleep.Here ar There are so many （ ）signs here you have so many photos.( Here you are 有关so do I、so you are、so am I这类句型的用法?简明! so 倒装句用法 If so ,you are here in the right place! 赤壁赋中“知不可乎骤得”中的“乎”作何解释?是什么用法? 一首英文歌you are so beatiful