Ok, for a lost opportunity, we use "should have + PP"
Ex: You have just missed the train because you woke up late. You should have gone to bed early yesterday.
But What about when the opportunity has lost by 50%?
Ok, see this situation,
Student A has an English class from 7 AM to 9 AM today. Now is 8 AM & Student A has just woke up. His opportunity is lost by 50%. His father should say:
Option 1: You should be studying English.
Option 2: You should have been studying English.
Which option is suitable in this context?