how come you didn't go into class today意思是为什么今天没去上班?要表达为什么今天

1、“上班”在英语中应该用下列俗语：
* go to work
* be on duty
2、come 与 how 连用构成疑问句,表示问话者的诧异,如果谓语动词表示行为,助动词 do 或者省略（come 起感叹词的作用）或者倒装（come 代替 do 起助动词作用）,意思是“怎么就会”.本句正确的说法应该是——
* 倒装：
--how come didn't you go to work today?（行为动词 go）
--how come wasn't you on duty today?（系动词 be）
* 省略：
--how come you not go to work today?
准确的意思是“你今天怎么就没去上课呢?”

应该用why 提问吧。Why you don't go to work today?

你说的这几个词都是学校有关的，上班应该是how come you didn't go to be on the job today

How come you didn't go into class today?----你今天为什么没进班上课？
How come you didn't go TO work today? ---- 你今天为什么没去上班？（注意这里用：go to work，而不是：go into work。同样上学也是：go to school，而不是：go into school）

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