【问】 Seeing everyone is here，we may as well get into the train.

seeing是分词吗?

【答】 seeing是复杂连词seeing that的省略形式，其含义相当于as，since，now(that)，但是，seeing that(鉴于，由于)一般用于正式语体：

1. Seeing that it seems as if it will rain soon，we had better leave now.

好象过一会儿就要下雨，我们最好现在就走。

2. Seeing(that) she’s lawfully old enough to get married，I don’t see how you can stopher. (LDCE)

她已到合法的结婚年龄，我不明白你怎么能阻止她。