[译] 除了小王，还有两个男孩值日。
[误] Two other boys were on duty except Xiao Wang.

[正] Two other boys were on duty besides Xiao Wang.
[注] besides 表示在一个部分上再加上一部分，如同 with 或 plus ( + )。except 是从一个整体中减去一部分，如同 without 或 minus( - )。