动宾关系小问题

with his reward added to,是独立主格结构即：with + 逻辑主语 + 分词，这里的added to 与 reward 成动宾关系，所以要用过去分词，含有被动的意思，也就是“被加上的奖金”
如果改一种说法：That year his total income added up to 1500 dollars, in which his reward is added to.(非限制性定语从句中的被动语态一目了然。)

再举两个例子：
1. The teacher came into the classroom, (with) some students following him.
students和following成主谓关系，因此用现在分词。
2. The teacher came into the classroom, followed by some students.
teacher成了被follow的对象，因此要用过去分词。

因为奖金是被老板加进总工资的，所以是被动意思，用过去分词。

如果是主动意思，就是现在分词。例子：

He likes the boss adding reward.
他喜欢那个加工资的老板。