英语会话翻译

我想问一下:
I like to ask about some matters:

我们是么时候有课，需要去学校啊？
When will we have classes and we have to go to school?

为什么我按照课表，今天下午去学校，却没有人？
According to our class schedule， I went to school this afternoon, why I didn't see anyone appear at school?

我是B周的Module，那A周的其他课程还用来吗？
My module is supposed to be on week B, must I have to attend other classes that scheduled on week A?

When am I supposed to go to school? Can you explain the fact that I went to the campus this afternoon according to my schedule but there was no one? Do I have to come for others lessons in week A if I am assigned the week B module?
请放心