Suppose that Bob attends a class at 8 A.M. So if Alice is in the same class at that time she surely sees Bob. But we are not sure whether Alice was at that class yesterday at 8 AM so we don't know whether she saw Bob. I want to tell Alice what would happen according to her presence at that time but I don't know where she was at that time. Conditional sentences type 1 through 3 are used when you are sure about the if clause. What to say when you are not? Are these sentences correct?
If you were in the class at 8 AM you surely saw Bob. If you have been in the class at 8 AM you have surely seen Bob. If you had been in the class at 8 AM you had surely seen Bob.
I am in doubt because we don't know the situation is real or unreal in this case.